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| author | Dean Camera <dean@fourwalledcubicle.com> | 2009-02-23 09:30:29 +0000 |
|---|---|---|
| committer | Dean Camera <dean@fourwalledcubicle.com> | 2009-02-23 09:30:29 +0000 |
| commit | fa456ce531b75e2dd3c7c0ecb971e3ede36f5d35 (patch) | |
| tree | 36e7c477f1686c3b4259706cf411105dba5147f3 /Demos/USBtoSerial | |
| parent | 8aeab064575a9ad0742129e2763e2a93e3cb9a33 (diff) | |
| download | lufa-fa456ce531b75e2dd3c7c0ecb971e3ede36f5d35.tar.gz lufa-fa456ce531b75e2dd3c7c0ecb971e3ede36f5d35.tar.bz2 lufa-fa456ce531b75e2dd3c7c0ecb971e3ede36f5d35.zip | |
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.
Diffstat (limited to 'Demos/USBtoSerial')
| -rw-r--r-- | Demos/USBtoSerial/USBtoSerial.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/Demos/USBtoSerial/USBtoSerial.c b/Demos/USBtoSerial/USBtoSerial.c index 7c06007a3..0cef8d193 100644 --- a/Demos/USBtoSerial/USBtoSerial.c +++ b/Demos/USBtoSerial/USBtoSerial.c @@ -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
|