Fixed bug related to spurious interrupt
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@11533 35acf78f-673a-0410-8e92-d51de3d6d3f4
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@ -1343,6 +1343,13 @@ void uart_lld_stop(UARTDriver *uartp) {
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*/
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void uart_lld_start_send(UARTDriver *uartp, size_t n, const void *txbuf) {
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/* TX DMA channel preparation.*/
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dmaChannelSetSource(uartp->dmatx, txbuf);
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dmaChannelSetTransactionSize(uartp->dmatx, n);
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/* Starting transfer.*/
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dmaChannelEnable(uartp->dmatx);
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/* Only enable TC interrupt if there's a callback attached to it.
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Also we need to clear TC flag which could be set before. */
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if (uartp->config->txend2_cb != NULL) {
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@ -1355,13 +1362,6 @@ void uart_lld_start_send(UARTDriver *uartp, size_t n, const void *txbuf) {
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uartp->usart->US_IER = US_IER_TXEMPTY;
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#endif
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}
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/* TX DMA channel preparation.*/
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dmaChannelSetSource(uartp->dmatx, txbuf);
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dmaChannelSetTransactionSize(uartp->dmatx, n);
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/* Starting transfer.*/
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dmaChannelEnable(uartp->dmatx);
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}
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/**
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@ -1378,8 +1378,8 @@ void uart_lld_start_send(UARTDriver *uartp, size_t n, const void *txbuf) {
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size_t uart_lld_stop_send(UARTDriver *uartp) {
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dmaChannelDisable(uartp->dmatx);
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/* number of data frames not transmitted is always zero */
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return 0;
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return dmaChannelGetTransactionSize(uartp->dmatx);
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}
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/**
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@ -1400,7 +1400,7 @@ void uart_lld_start_receive(UARTDriver *uartp, size_t n, void *rxbuf) {
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/* Enabling BIE interrupt if disabled */
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if ((uartp->dmarx->xdmac->XDMAC_CHID[uartp->dmarx->chid].XDMAC_CIM & XDMAC_CIM_BIM) == 0) {
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uartp->dmarx->xdmac->XDMAC_CHID[uartp->dmarx->chid].XDMAC_CIE = XDMAC_CIE_BIE;
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uartp->dmarx->xdmac->XDMAC_CHID[uartp->dmarx->chid].XDMAC_CIE = XDMAC_CIE_BIE;
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}
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/* Resetting the XDMAC_CNCDAx */
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@ -1440,7 +1440,7 @@ size_t uart_lld_stop_receive(UARTDriver *uartp) {
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size_t n;
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dmaChannelDisable(uartp->dmarx);
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n = 0;
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n = dmaChannelGetTransactionSize(uartp->dmarx);
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uart_enter_rx_idle_loop(uartp);
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return n;
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