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authorDean Camera <dean@fourwalledcubicle.com>2009-07-21 13:31:21 +0000
committerDean Camera <dean@fourwalledcubicle.com>2009-07-21 13:31:21 +0000
commite071f3897a0946c6be1e1b5e1f78eda8dcbf6fc7 (patch)
tree51ac5c80564fd76c93a357ee4d52a347384ac84b /Demos/Device/LowLevel/CDC/CDC.c
parent44179abcf85acb14fb3aff72ce50ae84281c0f2e (diff)
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Added new USB_DeviceState variable to keep track of the current Device mode USB state.
Added new Endpoint_ClearStatusStage() convenience function to assist with the status stages of control transfers. Removed vague USB_IsConnected global - test USB_DeviceState or USB_HostState explicitly to gain previous functionality. Removed USB_IsSuspended global - test USB_DeviceState against DEVICE_STATE_Suspended instead. Fixed possible enumeration errors from spinloops which may fail to exit if the USB connection is severed before the exit condition becomes true.
Diffstat (limited to 'Demos/Device/LowLevel/CDC/CDC.c')
-rw-r--r--Demos/Device/LowLevel/CDC/CDC.c51
1 files changed, 28 insertions, 23 deletions
diff --git a/Demos/Device/LowLevel/CDC/CDC.c b/Demos/Device/LowLevel/CDC/CDC.c
index d8263b11f..e63257dbd 100644
--- a/Demos/Device/LowLevel/CDC/CDC.c
+++ b/Demos/Device/LowLevel/CDC/CDC.c
@@ -56,12 +56,15 @@ CDC_Line_Coding_t LineCoding = { .BaudRateBPS = 9600,
*/
static int CDC_putchar (char c, FILE *stream)
-{
- if (!(USB_IsConnected))
- return -1;
-
+{
Endpoint_SelectEndpoint(CDC_TX_EPNUM);
- while (!(Endpoint_IsReadWriteAllowed()));
+
+ while (!(Endpoint_IsReadWriteAllowed()))
+ {
+ if (USB_DeviceState != DEVICE_STATE_Configured)
+ return -1;
+ }
+
Endpoint_Write_Byte(c);
Endpoint_ClearIN();
@@ -76,10 +79,11 @@ static int CDC_getchar (FILE *stream)
for (;;)
{
- if (!(USB_IsConnected))
- return -1;
-
- while (!(Endpoint_IsReadWriteAllowed()));
+ while (!(Endpoint_IsReadWriteAllowed()))
+ {
+ if (USB_DeviceState != DEVICE_STATE_Configured)
+ return -1;
+ }
if (!(Endpoint_BytesInEndpoint()))
{
@@ -229,9 +233,7 @@ void EVENT_USB_UnhandledControlPacket(void)
CONTROL_LINE_OUT_* masks to determine the RTS and DTR line states using the following code:
*/
- /* Acknowledge status stage */
- while (!(Endpoint_IsINReady()));
- Endpoint_ClearIN();
+ Endpoint_ClearStatusStage();
}
break;
@@ -244,18 +246,17 @@ void CDC_Task(void)
char* ReportString = NULL;
uint8_t JoyStatus_LCL = Joystick_GetStatus();
static bool ActionSent = false;
-
- char* JoystickStrings[] =
- {
- "Joystick Up\r\n",
- "Joystick Down\r\n",
- "Joystick Left\r\n",
- "Joystick Right\r\n",
- "Joystick Pressed\r\n",
- };
+ char* JoystickStrings[] =
+ {
+ "Joystick Up\r\n",
+ "Joystick Down\r\n",
+ "Joystick Left\r\n",
+ "Joystick Right\r\n",
+ "Joystick Pressed\r\n",
+ };
/* Device must be connected and configured for the task to run */
- if (!(USB_IsConnected) || !(USB_ConfigurationNumber))
+ if (USB_DeviceState != DEVICE_STATE_Configured)
return;
#if 0
@@ -319,7 +320,11 @@ void CDC_Task(void)
if (IsFull)
{
/* Wait until the endpoint is ready for another packet */
- while (!(Endpoint_IsINReady()));
+ while (!(Endpoint_IsINReady()))
+ {
+ if (USB_DeviceState == DEVICE_STATE_Unattached)
+ return;
+ }
/* Send an empty packet to ensure that the host does not buffer data sent to it */
Endpoint_ClearIN();