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USBtoSerial demo now discards all Rx data when not connected to a USB host, rather than buffering characters for transmission next time the device is attached to a host.

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This commit is contained in:
Dean Camera 2009-02-23 09:30:29 +00:00
parent 8aeab06457
commit fa456ce531
2 changed files with 12 additions and 2 deletions
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12
Demos/USBtoSerial/USBtoSerial.c
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@ -116,6 +116,10 @@ EVENT_HANDLER(USB_Disconnect)
/* Stop running CDC and USB management tasks */
Scheduler_SetTaskMode(CDC_Task, TASK_STOP);
Scheduler_SetTaskMode(USB_USBTask, TASK_STOP);
/* Reset Tx and Rx buffers, device disconnected */
Buffer_Initialize(&Rx_Buffer);
Buffer_Initialize(&Tx_Buffer);
/* Indicate USB not ready */
UpdateStatus(Status_USBNotReady);
@ -322,8 +326,12 @@ ISR(USART1_TX_vect, ISR_BLOCK)
*/
ISR(USART1_RX_vect, ISR_BLOCK)
{
/* Character received, store it into the buffer */
Buffer_StoreElement(&Tx_Buffer, UDR1);
/* Only store received characters if the USB interface is connected */
if (USB_IsConnected)
{
/* Character received, store it into the buffer */
Buffer_StoreElement(&Tx_Buffer, UDR1);
}
}
/** Function to manage status updates to the user. This is done via LEDs on the given board, if available, but may be changed to