diff options
| author | Dean Camera <dean@fourwalledcubicle.com> | 2009-07-21 13:31:21 +0000 |
|---|---|---|
| committer | Dean Camera <dean@fourwalledcubicle.com> | 2009-07-21 13:31:21 +0000 |
| commit | e071f3897a0946c6be1e1b5e1f78eda8dcbf6fc7 (patch) | |
| tree | 51ac5c80564fd76c93a357ee4d52a347384ac84b /Bootloaders/CDC/BootloaderCDC.c | |
| parent | 44179abcf85acb14fb3aff72ce50ae84281c0f2e (diff) | |
| download | lufa-e071f3897a0946c6be1e1b5e1f78eda8dcbf6fc7.tar.gz lufa-e071f3897a0946c6be1e1b5e1f78eda8dcbf6fc7.tar.bz2 lufa-e071f3897a0946c6be1e1b5e1f78eda8dcbf6fc7.zip | |
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 'Bootloaders/CDC/BootloaderCDC.c')
| -rw-r--r-- | Bootloaders/CDC/BootloaderCDC.c | 47 |
1 files changed, 32 insertions, 15 deletions
diff --git a/Bootloaders/CDC/BootloaderCDC.c b/Bootloaders/CDC/BootloaderCDC.c index d875b842d..cbcfd7e6c 100644 --- a/Bootloaders/CDC/BootloaderCDC.c +++ b/Bootloaders/CDC/BootloaderCDC.c @@ -165,9 +165,7 @@ void EVENT_USB_UnhandledControlPacket(void) Endpoint_ClearIN();
- /* Acknowledge status stage */
- while (!(Endpoint_IsOUTReceived()));
- Endpoint_ClearOUT();
+ Endpoint_ClearStatusStage();
}
break;
@@ -176,16 +174,18 @@ void EVENT_USB_UnhandledControlPacket(void) {
Endpoint_ClearSETUP();
- while (!(Endpoint_IsOUTReceived()));
-
+ while (!(Endpoint_IsOUTReceived()))
+ {
+ if (USB_DeviceState == DEVICE_STATE_Unattached)
+ return;
+ }
+
for (uint8_t i = 0; i < sizeof(LineCoding); i++)
*(LineCodingData++) = Endpoint_Read_Byte();
Endpoint_ClearOUT();
- /* Acknowledge status stage */
- while (!(Endpoint_IsINReady()));
- Endpoint_ClearIN();
+ Endpoint_ClearStatusStage();
}
break;
@@ -194,9 +194,7 @@ void EVENT_USB_UnhandledControlPacket(void) {
Endpoint_ClearSETUP();
- /* Acknowledge status stage */
- while (!(Endpoint_IsINReady()));
- Endpoint_ClearIN();
+ Endpoint_ClearStatusStage();
}
break;
@@ -333,7 +331,12 @@ static uint8_t FetchNextCommandByte(void) while (!(Endpoint_IsReadWriteAllowed()))
{
Endpoint_ClearOUT();
- while (!(Endpoint_IsOUTReceived()));
+
+ while (!(Endpoint_IsOUTReceived()))
+ {
+ if (USB_DeviceState == DEVICE_STATE_Unattached)
+ return 0;
+ }
}
/* Fetch the next byte from the OUT endpoint */
@@ -354,7 +357,12 @@ static void WriteNextResponseByte(const uint8_t Response) if (!(Endpoint_IsReadWriteAllowed()))
{
Endpoint_ClearIN();
- while (!(Endpoint_IsINReady()));
+
+ while (!(Endpoint_IsINReady()))
+ {
+ if (USB_DeviceState == DEVICE_STATE_Unattached)
+ return;
+ }
}
/* Write the next byte to the OUT endpoint */
@@ -563,12 +571,21 @@ void CDC_Task(void) /* If a full endpoint's worth of data was sent, we need to send an empty packet afterwards to signal end of transfer */
if (IsEndpointFull)
{
- while (!(Endpoint_IsINReady()));
+ while (!(Endpoint_IsINReady()))
+ {
+ if (USB_DeviceState == DEVICE_STATE_Unattached)
+ return;
+ }
+
Endpoint_ClearIN();
}
/* Wait until the data has been sent to the host */
- while (!(Endpoint_IsINReady()));
+ while (!(Endpoint_IsINReady()))
+ {
+ if (USB_DeviceState == DEVICE_STATE_Unattached)
+ return;
+ }
/* Select the OUT endpoint */
Endpoint_SelectEndpoint(CDC_RX_EPNUM);
|