STM32F205RE SPI DMA 发送不成功

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我使用STM32F205 做SPI DMA 发送数据，总是发送不成功，请大家帮我看看是哪里出问题了，谢谢 ！

1. GPIO_InitTypeDef GPIO_InitStructure;
   
2.         SPI_InitTypeDef  SPI_InitStructure;
   
3.         DMA_InitTypeDef       DMA_InitStructure;
   
4.     //int ii =0;
   
5.         /*!< Enable SPI2 clocks */
   
6.         RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE);
   
7.         /*!< Enable GPIO clocks */
   
8.         RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
   
9.         RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);
   
10.         /*!< Connect SPI pins to AF5 */
    
11.         GPIO_PinAFConfig(GPIOB, GPIO_PinSource13,GPIO_AF_SPI2);
    
12.         GPIO_PinAFConfig(GPIOB, GPIO_PinSource14,GPIO_AF_SPI2);
    
13.         GPIO_PinAFConfig(GPIOB, GPIO_PinSource15,GPIO_AF_SPI2);
    
14. 
    
15.         GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    
16.         GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    
17.         GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    
18.         GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_DOWN;
    
19.         GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
    
20.         GPIO_Init(GPIOB, &GPIO_InitStructure);
    
21. 
    
22.         GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
    
23.         GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
    
24.         GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    
25.         GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    
26.         GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//GPIO_PuPd_NOPULL;
    
27.         GPIO_Init(GPIOB, &GPIO_InitStructure);
    
28.         //Cdfinger_BspCs_HIGH();
    
29.         //Cdfinger_Bspdelay_ms(1);
    
30.     Cdfinger_BspCs_LOW();
    
31. 
    
32.         SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    
33.         SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    
34.         SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    
35.         SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
    
36.         SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
    
37.         SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    
38.         SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
    
39.         SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    
40.         SPI_InitStructure.SPI_CRCPolynomial = 7;
    
41.         SPI_Init(SPI2, &SPI_InitStructure);
    
42.         SPI_Cmd(SPI2, ENABLE);
    
43. 
    
44. 
    
45.         /* DMA1 Stream0 channel4 spi tx configuration **************************************/
    
46.         DMA_DeInit(DMA1_Stream4);
    
47.         DMA_InitStructure.DMA_Channel = DMA_Channel_0;
    
48.         DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(SPI2->DR);
    
49.         DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&cdfingerimgtxbuf[0];
    
50.         DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
    
51.         DMA_InitStructure.DMA_BufferSize = 28*1024;
    
52.         DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//;
    
53.         DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    
54.         DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
    
55.         DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    
56.         DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;// ;
    
57.         DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;//DMA_Priority_High;
    
58.         DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;//DMA_FIFOMode_Enable;
    
59.         DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
    
60.         DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
    
61.         DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
    
62.         DMA_Init(DMA1_Stream4, &DMA_InitStructure);
    
63.         memset(cdfingerimgtxbuf,0x33,28*1024);
    
64. 
    
65.     SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Tx, ENABLE);
    
66.     DMA_Cmd(DMA1_Stream4, ENABLE);
    
67.     while(SPI_I2S_GetFlagStatus(SPI2,SPI_I2S_FLAG_TXE)==RESET);

复制代码

flyleaf

还没试过spi用dma发送

圆周率

flyleaf 发表于 2018-1-10 14:32
还没试过spi用dma发送

我也是第一次用，不知道为啥发不出来。

ZhLeLe

楼主后来找到问题了吗？怎么解决的？方便参考下你的代码吗？
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