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Fix USBtoSerial device demos -- ensure the UDR1 register contents is read in under all circumstances which fire the ISR, so that the receive complete interrupt is cleared correctly to prevent freezes.

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This commit is contained in:
Dean Camera 2009-08-16 10:57:47 +00:00
parent b71ff7c8cd
commit 3a85962f94
2 changed files with 6 additions and 2 deletions
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4
Demos/Device/ClassDriver/USBtoSerial/USBtoSerial.c
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@ -147,8 +147,10 @@ void EVENT_USB_Device_UnhandledControlPacket(void)
*/
ISR(USART1_RX_vect, ISR_BLOCK)
{
uint8_t ReceivedByte = UDR1;
if (USB_DeviceState == DEVICE_STATE_Configured)
Buffer_StoreElement(&Tx_Buffer, UDR1);
Buffer_StoreElement(&Tx_Buffer, ReceivedByte);
}
/** Event handler for the CDC Class driver Line Encoding Changed event.