Oops - fix missing constants in the TempDataLogger FatFS diskio.h header file.

Add const to all project descriptor definitions for safety.

30 files changed, 169 insertions, 169 deletions

diff --git a/Demos/Device/ClassDriver/AudioInput/Descriptors.c b/Demos/Device/ClassDriver/AudioInput/Descriptors.c
index e21785881..9706d5506 100644
--- a/Demos/Device/ClassDriver/AudioInput/Descriptors.c
+++ b/Demos/Device/ClassDriver/AudioInput/Descriptors.c
@@ -42,7 +42,7 @@
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -69,7 +69,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -236,7 +236,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -247,7 +247,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -258,7 +258,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(18), .Type = DTYPE_String},
 
diff --git a/Demos/Device/ClassDriver/AudioOutput/Descriptors.c b/Demos/Device/ClassDriver/AudioOutput/Descriptors.c
index 0dd547728..0b1e8c111 100644
--- a/Demos/Device/ClassDriver/AudioOutput/Descriptors.c
+++ b/Demos/Device/ClassDriver/AudioOutput/Descriptors.c
@@ -42,7 +42,7 @@
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -69,7 +69,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -236,7 +236,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -247,7 +247,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -258,7 +258,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(19), .Type = DTYPE_String},
 
diff --git a/Demos/Device/ClassDriver/DualVirtualSerial/Descriptors.c b/Demos/Device/ClassDriver/DualVirtualSerial/Descriptors.c
index 006d46857..8265a1626 100644
--- a/Demos/Device/ClassDriver/DualVirtualSerial/Descriptors.c
+++ b/Demos/Device/ClassDriver/DualVirtualSerial/Descriptors.c
@@ -54,7 +54,7 @@
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -81,7 +81,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -305,7 +305,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -316,7 +316,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -327,7 +327,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(13), .Type = DTYPE_String},
 
diff --git a/Demos/Device/ClassDriver/GenericHID/Descriptors.c b/Demos/Device/ClassDriver/GenericHID/Descriptors.c
index 761e904ea..d36ee4989 100644
--- a/Demos/Device/ClassDriver/GenericHID/Descriptors.c
+++ b/Demos/Device/ClassDriver/GenericHID/Descriptors.c
@@ -43,7 +43,7 @@
  *  the device will send, and what it may be sent back from the host. Refer to the HID specification for
  *  more details on HID report descriptors.
  */
-USB_Descriptor_HIDReport_Datatype_t PROGMEM GenericReport[] =
+const USB_Descriptor_HIDReport_Datatype_t PROGMEM GenericReport[] =
 {
 	/* Use the HID class driver's standard Vendor HID report.
 	 *  Vendor Usage Page: 1
@@ -60,7 +60,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM GenericReport[] =
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -87,7 +87,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -146,7 +146,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -157,7 +157,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -168,7 +168,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(21), .Type = DTYPE_String},
 
diff --git a/Demos/Device/ClassDriver/Joystick/Descriptors.c b/Demos/Device/ClassDriver/Joystick/Descriptors.c
index 5adac0ff8..fc8d99b47 100644
--- a/Demos/Device/ClassDriver/Joystick/Descriptors.c
+++ b/Demos/Device/ClassDriver/Joystick/Descriptors.c
@@ -43,7 +43,7 @@
  *  the device will send, and what it may be sent back from the host. Refer to the HID specification for
  *  more details on HID report descriptors.
  */ 
-USB_Descriptor_HIDReport_Datatype_t PROGMEM JoystickReport[] =
+const USB_Descriptor_HIDReport_Datatype_t PROGMEM JoystickReport[] =
 {
 	/* Use the HID class driver's standard Joystick report.
 	 *   Min X/Y Axis values: -100
@@ -60,7 +60,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM JoystickReport[] =
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -87,7 +87,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -146,7 +146,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -157,7 +157,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -168,7 +168,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(18), .Type = DTYPE_String},
 
diff --git a/Demos/Device/ClassDriver/Keyboard/Descriptors.c b/Demos/Device/ClassDriver/Keyboard/Descriptors.c
index 5f3f14592..24db9781f 100644
--- a/Demos/Device/ClassDriver/Keyboard/Descriptors.c
+++ b/Demos/Device/ClassDriver/Keyboard/Descriptors.c
@@ -43,7 +43,7 @@
  *  the device will send, and what it may be sent back from the host. Refer to the HID specification for
  *  more details on HID report descriptors.
  */
-USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
+const USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
 {
 	/* Use the HID class driver's standard Keyboard report.
 	 *   Max simultaneous keys: 6
@@ -56,7 +56,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -83,7 +83,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -142,7 +142,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -153,7 +153,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -164,7 +164,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(18), .Type = DTYPE_String},
 
diff --git a/Demos/Device/ClassDriver/KeyboardMouse/Descriptors.c b/Demos/Device/ClassDriver/KeyboardMouse/Descriptors.c
index 6c7b06dc0..4b1e802f2 100644
--- a/Demos/Device/ClassDriver/KeyboardMouse/Descriptors.c
+++ b/Demos/Device/ClassDriver/KeyboardMouse/Descriptors.c
@@ -45,7 +45,7 @@
  *
  *  This descriptor describes the mouse HID interface's report structure.
  */
-USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
+const USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
 {
 	/* Use the HID class driver's standard Mouse report.
 	 *   Min X/Y Axis values: -1
@@ -59,7 +59,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
 };
 
 /** Same as the MouseReport structure, but defines the keyboard HID interface's report structure. */
-USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
+const USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
 {
 	/* Use the HID class driver's standard Keyboard report.
 	 *   Max simultaneous keys: 6
@@ -72,7 +72,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -99,7 +99,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -195,7 +195,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -206,7 +206,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -217,7 +217,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(28), .Type = DTYPE_String},
 
diff --git a/Demos/Device/ClassDriver/KeyboardMouseMultiReport/Descriptors.c b/Demos/Device/ClassDriver/KeyboardMouseMultiReport/Descriptors.c
index 19f282f37..03a6618e6 100644
--- a/Demos/Device/ClassDriver/KeyboardMouseMultiReport/Descriptors.c
+++ b/Demos/Device/ClassDriver/KeyboardMouseMultiReport/Descriptors.c
@@ -45,7 +45,7 @@
  *

  *  This descriptor describes the multiple possible reports of the HID interface's report structure.

  */

-USB_Descriptor_HIDReport_Datatype_t PROGMEM HIDReport[] =

+const USB_Descriptor_HIDReport_Datatype_t PROGMEM HIDReport[] =

 {

 	/* Mouse Report */

 	HID_RI_USAGE_PAGE(8, 0x01), /* Generic Desktop */

@@ -119,7 +119,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM HIDReport[] =
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration

  *  process begins.

  */

-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =

+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =

 {

 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},

 

@@ -146,7 +146,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting

  *  a configuration so that the host may correctly communicate with the USB device.

  */

-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =

+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =

 {

 	.Config =

 		{

@@ -205,7 +205,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate

  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.

  */

-USB_Descriptor_String_t PROGMEM LanguageString =

+const USB_Descriptor_String_t PROGMEM LanguageString =

 {

 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},

 

@@ -216,7 +216,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device

  *  Descriptor.

  */

-USB_Descriptor_String_t PROGMEM ManufacturerString =

+const USB_Descriptor_String_t PROGMEM ManufacturerString =

 {

 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},

 

@@ -227,7 +227,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device

  *  Descriptor.

  */

-USB_Descriptor_String_t PROGMEM ProductString =

+const USB_Descriptor_String_t PROGMEM ProductString =

 {

 	.Header                 = {.Size = USB_STRING_LEN(26), .Type = DTYPE_String},

 

diff --git a/Demos/Device/ClassDriver/MIDI/Descriptors.c b/Demos/Device/ClassDriver/MIDI/Descriptors.c
index 4b6c7d617..0c7e63446 100644
--- a/Demos/Device/ClassDriver/MIDI/Descriptors.c
+++ b/Demos/Device/ClassDriver/MIDI/Descriptors.c
@@ -42,7 +42,7 @@
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -69,7 +69,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -248,7 +248,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -259,7 +259,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -270,7 +270,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(14), .Type = DTYPE_String},
 
diff --git a/Demos/Device/ClassDriver/MassStorage/Descriptors.c b/Demos/Device/ClassDriver/MassStorage/Descriptors.c
index 127928b41..fc9c87edf 100644
--- a/Demos/Device/ClassDriver/MassStorage/Descriptors.c
+++ b/Demos/Device/ClassDriver/MassStorage/Descriptors.c
@@ -54,7 +54,7 @@
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -81,7 +81,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -139,7 +139,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -150,7 +150,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -161,7 +161,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(22), .Type = DTYPE_String},
 
diff --git a/Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c b/Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c
index 577721e01..62aeef881 100644
--- a/Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c
+++ b/Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c
@@ -56,7 +56,7 @@
  *  the device will send, and what it may be sent back from the host. Refer to the HID specification for
  *  more details on HID report descriptors.
  */
-USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
+const USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
 {
 	/* Use the HID class driver's standard Keyboard report.
 	 *   Max simultaneous keys: 6
@@ -69,7 +69,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -96,7 +96,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -191,7 +191,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -202,7 +202,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -213,7 +213,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(35), .Type = DTYPE_String},
 
diff --git a/Demos/Device/ClassDriver/Mouse/Descriptors.c b/Demos/Device/ClassDriver/Mouse/Descriptors.c
index 75efb09a6..b3c9e38c4 100644
--- a/Demos/Device/ClassDriver/Mouse/Descriptors.c
+++ b/Demos/Device/ClassDriver/Mouse/Descriptors.c
@@ -43,7 +43,7 @@
  *  the device will send, and what it may be sent back from the host. Refer to the HID specification for
  *  more details on HID report descriptors.
  */
-USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
+const USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
 {
 	/* Use the HID class driver's standard Mouse report.
 	 *   Min X/Y Axis values: -1
@@ -61,7 +61,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -88,7 +88,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -147,7 +147,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -158,7 +158,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -169,7 +169,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(15), .Type = DTYPE_String},
 
diff --git a/Demos/Device/ClassDriver/RNDISEthernet/Descriptors.c b/Demos/Device/ClassDriver/RNDISEthernet/Descriptors.c
index 8822a2079..c6feb866b 100644
--- a/Demos/Device/ClassDriver/RNDISEthernet/Descriptors.c
+++ b/Demos/Device/ClassDriver/RNDISEthernet/Descriptors.c
@@ -42,7 +42,7 @@
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -69,7 +69,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -178,7 +178,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -189,7 +189,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -200,7 +200,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(19), .Type = DTYPE_String},
 
diff --git a/Demos/Device/ClassDriver/VirtualSerial/Descriptors.c b/Demos/Device/ClassDriver/VirtualSerial/Descriptors.c
index 0f52646e0..f84083e61 100644
--- a/Demos/Device/ClassDriver/VirtualSerial/Descriptors.c
+++ b/Demos/Device/ClassDriver/VirtualSerial/Descriptors.c
@@ -54,7 +54,7 @@
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -81,7 +81,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -190,7 +190,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -201,7 +201,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -212,7 +212,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(13), .Type = DTYPE_String},
 
diff --git a/Demos/Device/ClassDriver/VirtualSerialMouse/Descriptors.c b/Demos/Device/ClassDriver/VirtualSerialMouse/Descriptors.c
index 4e0e2b747..ac53f962f 100644
--- a/Demos/Device/ClassDriver/VirtualSerialMouse/Descriptors.c
+++ b/Demos/Device/ClassDriver/VirtualSerialMouse/Descriptors.c
@@ -55,7 +55,7 @@
  *  the device will send, and what it may be sent back from the host. Refer to the HID specification for
  *  more details on HID report descriptors.
  */
-USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
+const USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
 {
 	/* Use the HID class driver's standard Mouse report.
 	 *   Min X/Y Axis values: -1
@@ -73,7 +73,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -100,7 +100,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -260,7 +260,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -271,7 +271,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -282,7 +282,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(23), .Type = DTYPE_String},
 
diff --git a/Demos/Device/Incomplete/Sideshow/Descriptors.c b/Demos/Device/Incomplete/Sideshow/Descriptors.c
index ca5697c04..b19888d3c 100644
--- a/Demos/Device/Incomplete/Sideshow/Descriptors.c
+++ b/Demos/Device/Incomplete/Sideshow/Descriptors.c
@@ -30,7 +30,7 @@
 
 #include "Descriptors.h"
 
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	Header:                 {Size: sizeof(USB_Descriptor_Device_t), Type: DTYPE_Device},
 
@@ -52,7 +52,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 	NumberOfConfigurations: 1
 };
 
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -106,35 +106,35 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 		}
 };
 
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	Header:                 {Size: USB_STRING_LEN(1), Type: DTYPE_String},
 
 	UnicodeString:          {LANGUAGE_ID_ENG}
 };
 
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	Header:                 {Size: USB_STRING_LEN(11), Type: DTYPE_String},
 
 	UnicodeString:          L"Dean Camera"
 };
 
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	Header:                 {Size: USB_STRING_LEN(22), Type: DTYPE_String},
 
 	UnicodeString:          L"LUFA Sideshow Demo"
 };
 
-USB_Descriptor_String_t PROGMEM SerialNumberString =
+const USB_Descriptor_String_t PROGMEM SerialNumberString =
 {
 	Header:                 {Size: USB_STRING_LEN(12), Type: DTYPE_String},
 
 	UnicodeString:          L"000000000000"
 };
 
-USB_OSDescriptor_t PROGMEM OSDescriptorString =
+const USB_OSDescriptor_t PROGMEM OSDescriptorString =
 {
 	Header:                 {Size: sizeof(USB_OSDescriptor_t), Type: DTYPE_String},
 
@@ -142,7 +142,7 @@ USB_OSDescriptor_t PROGMEM OSDescriptorString =
 	VendorCode:             REQ_GetOSFeatureDescriptor
 };
 
-USB_OSCompatibleIDDescriptor_t PROGMEM DevCompatIDs =
+const USB_OSCompatibleIDDescriptor_t PROGMEM DevCompatIDs =
 {
 	TotalLength:            sizeof(USB_OSCompatibleIDDescriptor_t),
 	Version:                0x0100,
diff --git a/Demos/Device/Incomplete/TestAndMeasurement/Descriptors.c b/Demos/Device/Incomplete/TestAndMeasurement/Descriptors.c
index 93381b4e4..8cc6138f1 100644
--- a/Demos/Device/Incomplete/TestAndMeasurement/Descriptors.c
+++ b/Demos/Device/Incomplete/TestAndMeasurement/Descriptors.c
@@ -55,7 +55,7 @@
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -82,7 +82,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -150,7 +150,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -161,7 +161,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -172,7 +172,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(13), .Type = DTYPE_String},
 
diff --git a/Demos/Device/LowLevel/AudioInput/Descriptors.c b/Demos/Device/LowLevel/AudioInput/Descriptors.c
index 087b10126..f645d088e 100644
--- a/Demos/Device/LowLevel/AudioInput/Descriptors.c
+++ b/Demos/Device/LowLevel/AudioInput/Descriptors.c
@@ -42,7 +42,7 @@
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -69,7 +69,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -236,7 +236,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -247,7 +247,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -258,7 +258,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(18), .Type = DTYPE_String},
 
diff --git a/Demos/Device/LowLevel/AudioOutput/Descriptors.c b/Demos/Device/LowLevel/AudioOutput/Descriptors.c
index 78b93234d..3ac23c944 100644
--- a/Demos/Device/LowLevel/AudioOutput/Descriptors.c
+++ b/Demos/Device/LowLevel/AudioOutput/Descriptors.c
@@ -42,7 +42,7 @@
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -69,7 +69,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -236,7 +236,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -247,7 +247,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -258,7 +258,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(19), .Type = DTYPE_String},
 
diff --git a/Demos/Device/LowLevel/DualVirtualSerial/Descriptors.c b/Demos/Device/LowLevel/DualVirtualSerial/Descriptors.c
index 006d46857..8265a1626 100644
--- a/Demos/Device/LowLevel/DualVirtualSerial/Descriptors.c
+++ b/Demos/Device/LowLevel/DualVirtualSerial/Descriptors.c
@@ -54,7 +54,7 @@
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -81,7 +81,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -305,7 +305,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -316,7 +316,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -327,7 +327,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(13), .Type = DTYPE_String},
 
diff --git a/Demos/Device/LowLevel/GenericHID/Descriptors.c b/Demos/Device/LowLevel/GenericHID/Descriptors.c
index ed93277a3..abc9e8016 100644
--- a/Demos/Device/LowLevel/GenericHID/Descriptors.c
+++ b/Demos/Device/LowLevel/GenericHID/Descriptors.c
@@ -43,7 +43,7 @@
  *  the device will send, and what it may be sent back from the host. Refer to the HID specification for
  *  more details on HID report descriptors.
  */
-USB_Descriptor_HIDReport_Datatype_t PROGMEM GenericReport[] =
+const USB_Descriptor_HIDReport_Datatype_t PROGMEM GenericReport[] =
 {
 	HID_RI_USAGE_PAGE(16, 0xFF00), /* Vendor Page 1 */
 	HID_RI_USAGE(8, 0x01), /* Vendor Usage 1 */
@@ -68,7 +68,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM GenericReport[] =
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -95,7 +95,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -164,7 +164,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -175,7 +175,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -186,7 +186,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(21), .Type = DTYPE_String},
 
diff --git a/Demos/Device/LowLevel/Joystick/Descriptors.c b/Demos/Device/LowLevel/Joystick/Descriptors.c
index 5db6b0d28..09e86e71e 100644
--- a/Demos/Device/LowLevel/Joystick/Descriptors.c
+++ b/Demos/Device/LowLevel/Joystick/Descriptors.c
@@ -43,7 +43,7 @@
  *  the device will send, and what it may be sent back from the host. Refer to the HID specification for
  *  more details on HID report descriptors.
  */
-USB_Descriptor_HIDReport_Datatype_t PROGMEM JoystickReport[] =
+const USB_Descriptor_HIDReport_Datatype_t PROGMEM JoystickReport[] =
 {
 	HID_RI_USAGE_PAGE(8, 0x01), /* Generic Desktop */
 	HID_RI_USAGE(8, 0x04), /* Joystick */
@@ -79,7 +79,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM JoystickReport[] =
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -106,7 +106,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -165,7 +165,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -176,7 +176,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -187,7 +187,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(18), .Type = DTYPE_String},
 
diff --git a/Demos/Device/LowLevel/Keyboard/Descriptors.c b/Demos/Device/LowLevel/Keyboard/Descriptors.c
index 50d4fe3bc..9f29da827 100644
--- a/Demos/Device/LowLevel/Keyboard/Descriptors.c
+++ b/Demos/Device/LowLevel/Keyboard/Descriptors.c
@@ -44,7 +44,7 @@
  *  the device will send, and what it may be sent back from the host. Refer to the HID specification for
  *  more details on HID report descriptors.
  */
-USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
+const USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
 {
 	HID_RI_USAGE_PAGE(8, 0x01), /* Generic Desktop */
 	HID_RI_USAGE(8, 0x06), /* Keyboard */
@@ -85,7 +85,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -112,7 +112,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -181,7 +181,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -192,7 +192,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -203,7 +203,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(18), .Type = DTYPE_String},
 
diff --git a/Demos/Device/LowLevel/KeyboardMouse/Descriptors.c b/Demos/Device/LowLevel/KeyboardMouse/Descriptors.c
index 5de7afb33..2abbd406d 100644
--- a/Demos/Device/LowLevel/KeyboardMouse/Descriptors.c
+++ b/Demos/Device/LowLevel/KeyboardMouse/Descriptors.c
@@ -46,7 +46,7 @@
  *
  *  This descriptor describes the mouse HID interface's report structure.
  */
-USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
+const USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
 {
 	HID_RI_USAGE_PAGE(8, 0x01), /* Generic Desktop */
 	HID_RI_USAGE(8, 0x02), /* Mouse */
@@ -79,7 +79,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
 };
 
 /** Same as the MouseReport structure, but defines the keyboard HID interface's report structure. */
-USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
+const USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
 {
 	HID_RI_USAGE_PAGE(8, 0x01), /* Generic Desktop */
 	HID_RI_USAGE(8, 0x06), /* Keyboard */
@@ -120,7 +120,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -147,7 +147,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -253,7 +253,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -264,7 +264,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -275,7 +275,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(28), .Type = DTYPE_String},
 
diff --git a/Demos/Device/LowLevel/MIDI/Descriptors.c b/Demos/Device/LowLevel/MIDI/Descriptors.c
index 4b6c7d617..0c7e63446 100644
--- a/Demos/Device/LowLevel/MIDI/Descriptors.c
+++ b/Demos/Device/LowLevel/MIDI/Descriptors.c
@@ -42,7 +42,7 @@
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -69,7 +69,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -248,7 +248,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -259,7 +259,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -270,7 +270,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(14), .Type = DTYPE_String},
 
diff --git a/Demos/Device/LowLevel/MassStorage/Descriptors.c b/Demos/Device/LowLevel/MassStorage/Descriptors.c
index 127928b41..fc9c87edf 100644
--- a/Demos/Device/LowLevel/MassStorage/Descriptors.c
+++ b/Demos/Device/LowLevel/MassStorage/Descriptors.c
@@ -54,7 +54,7 @@
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -81,7 +81,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -139,7 +139,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -150,7 +150,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -161,7 +161,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(22), .Type = DTYPE_String},
 
diff --git a/Demos/Device/LowLevel/Mouse/Descriptors.c b/Demos/Device/LowLevel/Mouse/Descriptors.c
index c1ade26b7..fb1156a9e 100644
--- a/Demos/Device/LowLevel/Mouse/Descriptors.c
+++ b/Demos/Device/LowLevel/Mouse/Descriptors.c
@@ -43,7 +43,7 @@
  *  the device will send, and what it may be sent back from the host. Refer to the HID specification for
  *  more details on HID report descriptors.
  */
-USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
+const USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
 {
 	HID_RI_USAGE_PAGE(8, 0x01), /* Generic Desktop */
 	HID_RI_USAGE(8, 0x02), /* Mouse */
@@ -80,7 +80,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -107,7 +107,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -166,7 +166,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -177,7 +177,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -188,7 +188,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(15), .Type = DTYPE_String},
 
diff --git a/Demos/Device/LowLevel/RNDISEthernet/Descriptors.c b/Demos/Device/LowLevel/RNDISEthernet/Descriptors.c
index 8822a2079..c6feb866b 100644
--- a/Demos/Device/LowLevel/RNDISEthernet/Descriptors.c
+++ b/Demos/Device/LowLevel/RNDISEthernet/Descriptors.c
@@ -42,7 +42,7 @@
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -69,7 +69,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -178,7 +178,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -189,7 +189,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -200,7 +200,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(19), .Type = DTYPE_String},
 
diff --git a/Demos/Device/LowLevel/VirtualSerial/Descriptors.c b/Demos/Device/LowLevel/VirtualSerial/Descriptors.c
index 0f52646e0..f84083e61 100644
--- a/Demos/Device/LowLevel/VirtualSerial/Descriptors.c
+++ b/Demos/Device/LowLevel/VirtualSerial/Descriptors.c
@@ -54,7 +54,7 @@
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -81,7 +81,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -190,7 +190,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -201,7 +201,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -212,7 +212,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(13), .Type = DTYPE_String},
 
diff --git a/Demos/DualRole/ClassDriver/MouseHostDevice/Descriptors.c b/Demos/DualRole/ClassDriver/MouseHostDevice/Descriptors.c
index 541626e5a..7e47a3769 100644
--- a/Demos/DualRole/ClassDriver/MouseHostDevice/Descriptors.c
+++ b/Demos/DualRole/ClassDriver/MouseHostDevice/Descriptors.c
@@ -43,7 +43,7 @@
  *  the device will send, and what it may be sent back from the host. Refer to the HID specification for
  *  more details on HID report descriptors.
  */
-USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
+const USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
 {
 	/* Use the HID class driver's standard Mouse report.
 	 *   Min X/Y Axis values: -1
@@ -61,7 +61,7 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM MouseReport[] =
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
 	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -88,7 +88,7 @@ USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
 {
 	.Config =
 		{
@@ -147,7 +147,7 @@ USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t PROGMEM LanguageString =
+const USB_Descriptor_String_t PROGMEM LanguageString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -158,7 +158,7 @@ USB_Descriptor_String_t PROGMEM LanguageString =
  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ManufacturerString =
+const USB_Descriptor_String_t PROGMEM ManufacturerString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 
@@ -169,7 +169,7 @@ USB_Descriptor_String_t PROGMEM ManufacturerString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t PROGMEM ProductString =
+const USB_Descriptor_String_t PROGMEM ProductString =
 {
 	.Header                 = {.Size = USB_STRING_LEN(15), .Type = DTYPE_String},