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feat(PeriphDrivers): Add DMA error handling to UART driver #1464

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Merged
merged 1 commit into from
Nov 28, 2025
Merged

feat(PeriphDrivers): Add DMA error handling to UART driver #1464

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11 changes: 9 additions & 2 deletions Libraries/PeriphDrivers/Source/UART/uart_revb.c
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Original file line number Diff line number Diff line change
Expand Up @@ -382,11 +382,15 @@ int MXC_UART_RevB_AbortTransmission(mxc_uart_revb_regs_t *uart)
MXC_UART_ClearTXFIFO((mxc_uart_regs_t *)uart);
int uart_num = MXC_UART_GET_IDX((mxc_uart_regs_t *)uart);

MXC_UART_RevB_AsyncStop(uart);

if (states[uart_num].channelTx >= 0) {
MXC_DMA_Stop(states[uart_num].channelTx);
MXC_UART_RevB_DMACallback(states[uart_num].channelTx, E_ABORT);
}
if (states[uart_num].channelRx >= 0) {
MXC_DMA_Stop(states[uart_num].channelRx);
MXC_UART_RevB_DMACallback(states[uart_num].channelRx, E_ABORT);
}

if (states[uart_num].auto_dma_handlers) {
Expand Down Expand Up @@ -1121,6 +1125,9 @@ int MXC_UART_RevB_TransactionDMA(mxc_uart_revb_req_t *req, mxc_dma_regs_t *dma)
MXC_DMA_Init();
#endif

// All error interrupts are related to RX
MXC_UART_EnableInt((mxc_uart_regs_t *)(req->uart), MXC_UART_REVB_ERRINT_EN);

// Reset rx/tx counters,
req->rxCnt = 0;
req->txCnt = 0;
Expand Down Expand Up @@ -1182,7 +1189,7 @@ void MXC_UART_RevB_DMACallback(int ch, int error)
/* Only call TX callback if RX component is complete/disabled. Note that
we are checking the request associated with the _channel_ assignment, not
the other side of the state struct. */
temp_req->callback((mxc_uart_req_t *)temp_req, E_NO_ERROR);
temp_req->callback((mxc_uart_req_t *)temp_req, error);
}
break;
} else if (states[i].channelRx == ch) {
Expand All @@ -1197,7 +1204,7 @@ void MXC_UART_RevB_DMACallback(int ch, int error)
if (temp_req->callback != NULL &&
((states[i].rx_req->txCnt == states[i].rx_req->txLen) ||
states[i].rx_req->txData == NULL)) {
temp_req->callback((mxc_uart_req_t *)temp_req, E_NO_ERROR);
temp_req->callback((mxc_uart_req_t *)temp_req, error);
}
break;
}
Expand Down
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