diff options
| -rw-r--r-- | os/hal/platforms/STM32/uart_lld.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/os/hal/platforms/STM32/uart_lld.c b/os/hal/platforms/STM32/uart_lld.c index 8b9330fdc..7f55fabb0 100644 --- a/os/hal/platforms/STM32/uart_lld.c +++ b/os/hal/platforms/STM32/uart_lld.c @@ -371,9 +371,10 @@ void uart_lld_stop(UARTDriver *uartp) { */
void uart_lld_start_send(UARTDriver *uartp, size_t n, const void *txbuf) {
- (void)uartp;
- (void)n;
- (void)txbuf;
+ /* TX DMA channel preparation and start.*/
+ dmaSetupChannel(uartp->ud_dmap, uartp->ud_dmatx, n, &uartp->ud_txbuf,
+ uartp->ud_dmaccr | DMA_CCR1_TEIE | DMA_CCR1_TCIE);
+ dmaEnableChannel(uartp->ud_dmap, uartp->ud_dmatx);
}
/**
@@ -384,7 +385,8 @@ void uart_lld_start_send(UARTDriver *uartp, size_t n, const void *txbuf) { */
void uart_lld_stop_send(UARTDriver *uartp) {
- (void)uartp;
+ dmaDisableChannel(uartp->ud_dmap, uartp->ud_dmatx);
+ dmaClearChannel(uartp->ud_dmap, uartp->ud_dmatx);
}
/**
|