/* DMA routine for example_uart */
static void App_DMA_Test(void)
{
uint8_t receiveBuffer[16];
App_DMA_Init();
dmaChannelNumTx = Chip_DMA_GetFreeChannel(LPC_GPDMA, _GPDMA_CONN_UART_Tx);
isDMATx = ENABLE;
channelTC = channelTCErr = 0;
Chip_DMA_Transfer(LPC_GPDMA, dmaChannelNumTx,
(uint32_t) &uartDMA_menu[0],
_GPDMA_CONN_UART_Tx,
GPDMA_TRANSFERTYPE_M2P_CONTROLLER_DMA,
sizeof(uartDMA_menu));
while (!channelTC) {}
dmaChannelNumRx = Chip_DMA_GetFreeChannel(LPC_GPDMA, _GPDMA_CONN_UART_Rx);
isDMATx = DISABLE;
channelTC = channelTCErr = 0;
Chip_DMA_Transfer(LPC_GPDMA, dmaChannelNumRx,
_GPDMA_CONN_UART_Rx,
(uint32_t) &receiveBuffer[0],
GPDMA_TRANSFERTYPE_P2M_CONTROLLER_DMA,
10);
while (!channelTC) {}
isDMATx = ENABLE;
channelTC = channelTCErr = 0;
Chip_DMA_Transfer(LPC_GPDMA, dmaChannelNumTx,
(uint32_t) &receiveBuffer[0],
_GPDMA_CONN_UART_Tx,
GPDMA_TRANSFERTYPE_M2P_CONTROLLER_DMA,
10);
while (!channelTC) {}
App_DMA_DeInit();
}
/* DMA routine for DAC example */
static void App_DMA_Test(void)
{
uint32_t tmp = 0;
volatile uint32_t i = 0;
/* Initialize GPDMA controller */
Chip_GPDMA_Init(LPC_GPDMA);
/* Setting GPDMA interrupt */
NVIC_DisableIRQ(DMA_IRQn);
NVIC_SetPriority(DMA_IRQn, ((0x01 << 3) | 0x01));
NVIC_EnableIRQ(DMA_IRQn);
/* Get the free channel for DMA transfer */
dmaChannelNum = Chip_DMA_GetFreeChannel(LPC_GPDMA, GPDMA_CONN_DAC);
/* Output DAC value until get 'x' character */
while (DEBUGIN() != 'x') {
/* Start D/A conversion */
tmp++;
if (tmp == (DATA_SIZE - 1)) {
tmp = 0;
}
/* pre-format the data to DACR register */
DMAbuffer = (uint32_t) (DAC_VALUE(tmp) | DAC_BIAS_EN);
for (i = 0; i < 0x10000; i++) ;
channelTC = 0;
Chip_DMA_Transfer(LPC_GPDMA, dmaChannelNum,
(uint32_t) &DMAbuffer,
GPDMA_CONN_DAC,
GPDMA_TRANSFERTYPE_M2P_CONTROLLER_DMA,
1);
/* Waiting for writing DAC value completed */
while (channelTC == 0) {}
}
/* Disable interrupts, release DMA channel */
Chip_DMA_Stop(LPC_GPDMA, dmaChannelNum);
NVIC_DisableIRQ(DMA_IRQn);
}
