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[M487] Refine serial PDMA code

pull/4608/head
ccli8 2017-03-08 17:09:10 +08:00
parent 422871ab4d
commit 898a4bb4bd
1 changed files with 12 additions and 4 deletions
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16
targets/TARGET_NUVOTON/TARGET_M480/serial_api.c
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@ -591,7 +591,9 @@ int serial_tx_asynch(serial_t *obj, const void *tx, size_t tx_length, uint8_t tx
MBED_ASSERT(modinit != NULL);
MBED_ASSERT(modinit->modname == obj->serial.uart);
PDMA->CHCTL |= 1 << obj->serial.dma_chn_id_tx; // Enable this DMA channel
PDMA_T *pdma_base = dma_modbase();
pdma_base->CHCTL |= 1 << obj->serial.dma_chn_id_tx; // Enable this DMA channel
PDMA_SetTransferMode(obj->serial.dma_chn_id_tx,
((struct nu_uart_var *) modinit->var)->pdma_perp_tx, // Peripheral connected to this PDMA
0, // Scatter-gather disabled
@ -653,7 +655,9 @@ void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, uint8_t rx_widt
MBED_ASSERT(modinit != NULL);
MBED_ASSERT(modinit->modname == obj->serial.uart);
PDMA->CHCTL |= 1 << obj->serial.dma_chn_id_rx; // Enable this DMA channel
PDMA_T *pdma_base = dma_modbase();
pdma_base->CHCTL |= 1 << obj->serial.dma_chn_id_rx; // Enable this DMA channel
PDMA_SetTransferMode(obj->serial.dma_chn_id_rx,
((struct nu_uart_var *) modinit->var)->pdma_perp_rx, // Peripheral connected to this PDMA
0, // Scatter-gather disabled
@ -687,11 +691,13 @@ void serial_tx_abort_asynch(serial_t *obj)
while (! UART_IS_TX_EMPTY((UART_T *) NU_MODBASE(obj->serial.uart)));
if (obj->serial.dma_usage_tx != DMA_USAGE_NEVER) {
PDMA_T *pdma_base = dma_modbase();
if (obj->serial.dma_chn_id_tx != DMA_ERROR_OUT_OF_CHANNELS) {
PDMA_DisableInt(obj->serial.dma_chn_id_tx, PDMA_INT_TRANS_DONE);
// FIXME: On NUC472, next PDMA transfer will fail with PDMA_STOP() called. Cause is unknown.
//PDMA_STOP(obj->serial.dma_chn_id_tx);
PDMA->CHCTL &= ~(1 << obj->serial.dma_chn_id_tx);
pdma_base->CHCTL &= ~(1 << obj->serial.dma_chn_id_tx);
}
UART_DISABLE_INT(((UART_T *) NU_MODBASE(obj->serial.uart)), UART_INTEN_TXPDMAEN_Msk);
}
@ -706,11 +712,13 @@ void serial_tx_abort_asynch(serial_t *obj)
void serial_rx_abort_asynch(serial_t *obj)
{
if (obj->serial.dma_usage_rx != DMA_USAGE_NEVER) {
PDMA_T *pdma_base = dma_modbase();
if (obj->serial.dma_chn_id_rx != DMA_ERROR_OUT_OF_CHANNELS) {
PDMA_DisableInt(obj->serial.dma_chn_id_rx, PDMA_INT_TRANS_DONE);
// FIXME: On NUC472, next PDMA transfer will fail with PDMA_STOP() called. Cause is unknown.
//PDMA_STOP(obj->serial.dma_chn_id_rx);
PDMA->CHCTL &= ~(1 << obj->serial.dma_chn_id_rx);
pdma_base->CHCTL &= ~(1 << obj->serial.dma_chn_id_rx);
}
UART_DISABLE_INT(((UART_T *) NU_MODBASE(obj->serial.uart)), UART_INTEN_RXPDMAEN_Msk);
}