stm32f4 SPI DMA 通信读取数据，SPI 不发数据，DMA无法中断
这几天一直在搞SPI + DMA 通信，DMA设置成中断时，SPI无法发送数据，同时也无法产生DMA中断。具体SPI 和DMA的配置如下：SPI2 初始化
void SPI2_PeriphInit (void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
//GPIO_PinAFConfig(GPIOB, GPIO_PinSource12, GPIO_AF_SPI2); //PB12 NSS
GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_SPI2); //PB13 SCK
GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_SPI2); //PB14 MISO
GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2); //PB15 MOSI
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOB, GPIO_Pin_12);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd= GPIO_PuPd_DOWN;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_15;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd= GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
GPIO_Init(GPIOB, &GPIO_InitStructure);
SPI_InitTypeDef SPI_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
SPI_I2S_DeInit(SPI2);
SPI_InitStructure.SPI_Direction= SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
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_4;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI2, &SPI_InitStructure);
SPI_CalculateCRC(SPI2, DISABLE);
SPI_Cmd(SPI2, ENABLE);
}
void SPI2_DMAInit (void)
{
DMA_InitTypeDef DMA_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);
DMA_DeInit(DMA1_Stream3);
DMA_DeInit(DMA1_Stream4);
DMA_InitStructure.DMA_Channel= DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&(SPI2->DR));
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)ad7657_revbuf; //ad7657_revbuff 为2维数组 ， 2 x 6
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = AD7656REVDATALEN; //宏定义为6
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_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA1_Stream3, &DMA_InitStructure);
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)ad7657_send; //数组，6个字节
DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
DMA_InitStructure.DMA_BufferSize = AD7656SENDLEN; //宏定义 6
DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
DMA_Init(DMA1_Stream4, &DMA_InitStructure);
SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Tx, ENABLE);
SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Rx, ENABLE);
DMA_ITConfig(DMA1_Stream3, DMA_IT_TC | DMA_IT_TE, ENABLE);
DMA_ITConfig(DMA1_Stream4, DMA_IT_TC | DMA_IT_TE, ENABLE);
NVIC_InitTypeDefNVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Stream3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannel =ENABLE;
NVIC_Init(&NVIC_InitStructure);
DMA_Cmd(DMA1_Stream3, DISABLE);
DMA_Cmd(DMA1_Stream4, DISABLE);
}
定时触发DMA 发送数据
void TIM2_IRQHandler(void)
{
if (TIM_GetITStatus (TIM2, TIM_IT_Update) == SET)
{
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
GPIO_ResetBits(GPIOB, GPIO_Pin_12);
while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET);
DMA_SetCurrDataCounter(DMA1_Stream3, 6);
DMA_SetCurrDataCounter(DMA1_Stream4, 6);
DMA_Cmd(DMA1_Stream4, ENABLE);
DMA_Cmd(DMA1_Stream3, ENABLE);
}
}
DMA 产生中断
void DMA1_Stream3_IRQHandler (void)
{
if (DMA_GetITStatus(DMA1_Stream3, DMA_IT_TCIF3) == SET)
{
DMA_ClearFlag(DMA1_Stream3, DMA_IT_TC);
DMA_ClearFlag(DMA1_Stream4, DMA_IT_TC);
DMA_ClearITPendingBit(DMA1_Stream3, DMA_IT_TCIF3);
DMA_ClearITPendingBit(DMA1_Stream4, DMA_IT_TCIF4);
GPIO_SetBits(GPIOB, GPIO_Pin_12);
SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Tx, DISABLE);
SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Rx, DISABLE);
}
}
又试了一天还是无果，主SPI+DMA传输无法用中断来完成，不得不用阻塞方式。如果哪位看官需要，可以留言。希望有心人看到能够交流交流 单独DMA操作SPI可以吗? 曾经这个怎么搞都没通, dma不开中断，操作spi可以 搞定，过来结帖 东东-424146 发表于 2016-1-6 14:17
搞定，过来结帖
怎么搞好的，能把程序贴一下或者邮箱发我一下吗 125828526
菜鸟一颗 发表于 2016-1-27 15:38
怎么搞好的，能把程序贴一下或者邮箱发我一下吗 125828526
NVIC_InitTypeDefNVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Stream3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannel =ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_IRQChannel 通道设置错误，是要把通道使能的。不知道你问题解决没有 同求 怎么搞的啊 东东-424146 发表于 2016-4-26 14:34
NVIC_InitTypeDefNVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Stream3_IRQn;
NVIC ...
看着和上面的代码一样啊，能发我一份完整的代码吗 ，我在调试这个，一直有问题，谢谢416575202@qq.com 方便留个联系方式吗 最近一直在调SPI DMA发送 一直没出来。
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