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msp432p401lp-cc256x: setup dma for complete transfer

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This commit is contained in:
Matthias Ringwald 2020-11-11 18:48:09 +01:00
parent 5fd0122a3e
commit 9faef3b010
1 changed files with 18 additions and 0 deletions
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18
port/msp432p401lp-cc256x/main.c
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@ -192,6 +192,7 @@ static DMA_ControlTable MSP_EXP432P401RLP_DMAControlTable[32];
// RX Ping Pong Buffer - similar to circular buffer on other MCUs
#define HAL_DMA_RX_BUFFER_SIZE 2
static uint8_t hal_dma_rx_ping_pong_buffer[2 * HAL_DMA_RX_BUFFER_SIZE];
static uint8_t hal_dam_rx_active_buffer = 0;
// rx state
static uint16_t bytes_to_read = 0;
@ -287,6 +288,23 @@ void DMA_INT2_IRQHandler(void)
MAP_DMA_clearInterruptFlag(DMA_CH5_EUSCIA2RX & 0x0F);
GPIO_setOutputHighOnPin(GPIO_PORT_P5, GPIO_PIN6);
GPIO_setOutputLowOnPin(GPIO_PORT_P5, GPIO_PIN6);
// reset transfer
if (hal_dam_rx_active_buffer == 0){
hal_dam_rx_active_buffer = 1;
MAP_DMA_setChannelTransfer(DMA_CH5_EUSCIA2RX | UDMA_PRI_SELECT,
UDMA_MODE_PINGPONG,
(void *) UART_getReceiveBufferAddressForDMA(EUSCI_A2_BASE),
(uint8_t *) &hal_dma_rx_ping_pong_buffer[0],
HAL_DMA_RX_BUFFER_SIZE);
} else {
hal_dam_rx_active_buffer = 0;
MAP_DMA_setChannelTransfer(DMA_CH5_EUSCIA2RX | UDMA_ALT_SELECT,
UDMA_MODE_PINGPONG,
(void *) UART_getReceiveBufferAddressForDMA(EUSCI_A2_BASE),
(uint8_t *) &hal_dma_rx_ping_pong_buffer[HAL_DMA_RX_BUFFER_SIZE],
HAL_DMA_RX_BUFFER_SIZE);
}
}
#if 0