STM32F407+SDIO WIFI模块（8686）使用DMA传输不成功。

flyaway12580

程序运行后卡在while (DMA_GetFlagStatus(DMA2_Stream3,DMA_FLAG_TCIF3) == RESET){}这一句。
此时，部分寄存器状态为SDIO->STA=0x00045000，DMA_GetCurrDataCounter(DMA2_Stream3)=16，

部分内存数据：

DMA配置代码如下：

[mw_shl_code=c,true]static void DMA_TxConfiguration(u32 *BufferSRC, u32 BufferSize) { DMA_InitTypeDef DMA_InitStructure; RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2,ENABLE); DMA_Cmd(DMA2_Stream3, DISABLE); DMA_DeInit(DMA2_Stream3); while (DMA_GetCmdStatus(DMA2_Stream3) != DISABLE){} DMA_ClearFlag(DMA2_Stream3,DMA_FLAG_TCIF3 | DMA_FLAG_HTIF3 | DMA_FLAG_TEIF3 | DMA_FLAG_DMEIF3 | DMA_FLAG_FEIF3); /* DMA2 Channel4 Config */ DMA_InitStructure.DMA_Channel=DMA_Channel_4; DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)SDIO_FIFO_Address; DMA_InitStructure.DMA_Memory0BaseAddr = (u32)BufferSRC; DMA_InitStructure.DMA_DIR =DMA_DIR_MemoryToPeripheral; DMA_InitStructure.DMA_BufferSize = BufferSize / 4; 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_VeryHigh; DMA_InitStructure.DMA_FIFOMode=DMA_FIFOMode_Disable; DMA_InitStructure.DMA_FIFOThreshold=DMA_FIFOThreshold_Full; // DMA_InitStructure.DMA_MemoryBurst=DMA_MemoryBurst_Single; // DMA_InitStructure.DMA_PeripheralBurst=DMA_MemoryBurst_Single; // DMA_FlowControllerConfig(DMA2_Stream3,DMA_FlowCtrl_Peripheral); DMA_Init(DMA2_Stream3, &DMA_InitStructure); DMA_Cmd(DMA2_Stream3, ENABLE); }[/mw_shl_code]

zuoyi

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