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tx_mode=2: compensate phantom BRK

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Susis Strolch
2019-05-27 12:47:06 +02:00
parent 078f89ce7e
commit fdebf6bbdf
1 changed files with 9 additions and 0 deletions
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9
src/emsuart.cpp
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@@ -16,6 +16,7 @@
_EMSRxBuf * pEMSRxBuf; _EMSRxBuf * pEMSRxBuf;
_EMSRxBuf * paEMSRxBuf[EMS_MAXBUFFERS]; _EMSRxBuf * paEMSRxBuf[EMS_MAXBUFFERS];
uint8_t emsRxBufIdx = 0; uint8_t emsRxBufIdx = 0;
uint8_t phantomBrk = 0; // tells Rx about upcoming phantom break from Tx
os_event_t recvTaskQueue[EMSUART_recvTaskQueueLen]; // our Rx queue os_event_t recvTaskQueue[EMSUART_recvTaskQueueLen]; // our Rx queue
@@ -49,6 +50,12 @@ static void emsuart_rx_intr_handler(void * para) {
U0IC = (1 << UIBD); // INT clear the BREAK detect interrupt U0IC = (1 << UIBD); // INT clear the BREAK detect interrupt
// we've send a BRK with loopback enabled, so we must compensate the phantom break
if (phantomBrk) {
length--; // compensate buffer length
phantomBrk = 0; // clear flag
}
// copy data into transfer buffer // copy data into transfer buffer
pEMSRxBuf->writePtr = length; pEMSRxBuf->writePtr = length;
os_memcpy((void *)pEMSRxBuf->buffer, (void *)&uart_buffer, length); os_memcpy((void *)pEMSRxBuf->buffer, (void *)&uart_buffer, length);
@@ -251,6 +258,8 @@ void ICACHE_FLASH_ATTR emsuart_tx_buffer(uint8_t * buf, uint8_t len) {
// otherwise, we send the final Tx-BRK in loopback and enable Rx-INT. // otherwise, we send the final Tx-BRK in loopback and enable Rx-INT.
// worst case, we'll see an additional Rx-BRK... // worst case, we'll see an additional Rx-BRK...
if (!(USIS(EMSUART_UART) & (1 << UIBD))) { if (!(USIS(EMSUART_UART) & (1 << UIBD))) {
phantomBrk = 1; // tell Rx to expect a phantom BRK
// no bus collision - send terminating BRK signal // no bus collision - send terminating BRK signal
emsuart_loopback(true); emsuart_loopback(true);
USC0(EMSUART_UART) |= (1 << UCBRK); // set <BRK> USC0(EMSUART_UART) |= (1 << UCBRK); // set <BRK>