void PDMA_Init(void)
{
/* Open PDMA Channel */
PDMA_Open(1 << 0); // Channel 0 for UART1 TX
PDMA_Open(1 << 1); // Channel 1 for UART1 RX
// Select basic mode
PDMA_SetTransferMode(0, PDMA_UART1_TX, 0, 0);
PDMA_SetTransferMode(1, PDMA_UART1_RX, 0, 0);
// Set data width and transfer count
PDMA_SetTransferCnt(0, PDMA_WIDTH_8, PDMA_TEST_LENGTH);
PDMA_SetTransferCnt(1, PDMA_WIDTH_8, PDMA_TEST_LENGTH);
//Set PDMA Transfer Address
PDMA_SetTransferAddr(0, ((uint32_t) (&g_u8Tx_Buffer[PDMA_TEST_LENGTH])), PDMA_SAR_INC, UART1_BASE, PDMA_DAR_FIX);
PDMA_SetTransferAddr(1, UART1_BASE, PDMA_SAR_FIX, ((uint32_t) (&g_u8Rx_Buffer[PDMA_TEST_LENGTH])), PDMA_DAR_INC);
//Select Single Request
PDMA_SetBurstType(0, PDMA_REQ_SINGLE, 0);
PDMA_SetBurstType(1, PDMA_REQ_SINGLE, 0);
//Set timeout
//PDMA_SetTimeOut(0, 0, 0x5555);
//PDMA_SetTimeOut(1, 0, 0x5555);
#ifdef ENABLE_PDMA_INTERRUPT
PDMA_EnableInt(0, 0);
PDMA_EnableInt(1, 0);
NVIC_EnableIRQ(PDMA_IRQn);
u32IsTestOver = 0;
#endif
}
/*---------------------------------------------------------------------------------------------------------*/
int PDMA_Example(void)
{
uint32_t u32EndSrc, u32EndDst;
/* Init System, IP clock and multi-function I/O */
SYS_Init(); //In the end of SYS_Init() will issue SYS_LockReg() to lock protected register. If user want to write protected register, please issue SYS_UnlockReg() to unlock protected register.
/* Init UART for printf */
UART0_Init();
printf("\n\nCPU @ %dHz\n", SystemCoreClock);
printf("+------------------------------------------------------+ \n");
printf("| NUC400 PDMA Memory to Memory Driver Sample Code | \n");
printf("+------------------------------------------------------+ \n");
/* Open Channel 2 */
PDMA_Open(1 << 2);
PDMA_SetTransferCnt(2, PDMA_WIDTH_32, PDMA_TEST_LENGTH);
u32EndSrc = (uint32_t)SrcArray + PDMA_TEST_LENGTH * 4;
u32EndDst = (uint32_t)DestArray + PDMA_TEST_LENGTH * 4;
PDMA_SetTransferAddr(2, u32EndSrc, PDMA_SAR_INC, u32EndDst, PDMA_DAR_INC);
PDMA_SetTransferMode(2, PDMA_MEM, 0, 0);
PDMA_SetBurstType(2, PDMA_REQ_BURST, PDMA_BURST_4);
PDMA_SetTimeOut(2, 0, 0x5);
PDMA_EnableInt(2, 0);
NVIC_EnableIRQ(PDMA_IRQn);
u32IsTestOver = 0;
PDMA_Trigger(2);
while(u32IsTestOver == 0);
if (u32IsTestOver == 1)
printf("test done...\n");
else if (u32IsTestOver == 2)
printf("target abort...\n");
else if (u32IsTestOver == 3)
printf("timeout...\n");
PDMA_Close();
}
