GD32 SPI+DMA 发送不了数据

只看该作者 · 2017-10-9 09:30

初始化程序如下，SPI1发送不了数据，不知为什么，这个程序经验证在STM32F103cBT6上运算是可以的,但在GD32F103RBT6上没有反应。

void LED_SPI_DMA_Init(void)
{
uint16_t i = 0;

GPIO_InitTypeDef  GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
   RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
DMA_DeInit(DMA1_Channel3);
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) & (SPI1->DR);
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)PixelBuffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
DMA_InitStructure.DMA_BufferSize = 0;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel3, &DMA_InitStructure);

   DMA_Cmd(DMA1_Channel3, ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
SPI_I2S_DeInit(SPI1);
SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Tx;//µ¥¹¤Í¨ÐÅ Ö»·¢ËÍ
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;//16Î»·¢ËÍ£¬DMAÒ²ÊÇ16Î»´«ËÍÊý¾Ý
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;//9MHZ
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;    //ÏÈ´«¸ß×Ö½Ú
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI1, &SPI_InitStructure);
SPI_Cmd(SPI1, ENABLE);

SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE);

SPI_Cmd(SPI1, ENABLE);

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);

}