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Fix UART TX DMA corruption

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- Use ATOMIC while examining and updating DMA status
- Mask premature TC interrupt by examining transfer count register
(CNTDR/NTDR) for F1 and F4.
This commit is contained in:
jflyper 2017-06-25 17:21:29 +09:00
parent 4bacbdcc91
commit 697e5d3925
8 changed files with 94 additions and 46 deletions
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7
src/main/drivers/serial_uart_stm32f10x.c
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@ -109,12 +109,9 @@ void uart_tx_dma_IRQHandler(dmaChannelDescriptor_t* descriptor)
{
uartPort_t *s = (uartPort_t*)(descriptor->userParam);
DMA_CLEAR_FLAG(descriptor, DMA_IT_TCIF);
DMA_Cmd(descriptor->ref, DISABLE);
DMA_Cmd(descriptor->channel, DISABLE); // XXX F1 needs this!!!
if (s->port.txBufferHead != s->port.txBufferTail)
uartStartTxDMA(s);
else
s->txDMAEmpty = true;
uartTryStartTxDMA(s);
}
// XXX Should serialUART be consolidated?