有Ch32V305 spi作為從機dma通訊的例子嗎?

官方例程只有發(fā)送是用dma的,接收不是。

我自己寫了一個,但是會卡住

void Spi1_InitSlave()

{

? ? printf("Spi1_InitSlave\r\n");

? ? GPIO_InitTypeDef GPIO_InitStructure={0};

? ? SPI_InitTypeDef SPI_InitStructure={0};


? ? RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1, ENABLE );


? ? //cs

? ? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;

? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

//? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;

? ? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

? ? GPIO_Init(GPIOA, &GPIO_InitStructure );


? ? //clk

? ? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;

? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

? ? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

? ? GPIO_Init(GPIOA, &GPIO_InitStructure );


? ? //miso

? ? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;? //MISO

? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

? ? GPIO_Init(GPIOA, &GPIO_InitStructure );


? ? //mosi

? ? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;

? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

? ? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

? ? GPIO_Init(GPIOA, &GPIO_InitStructure );


? ? SPI_SSOutputCmd(SPI1, ENABLE );


? ? SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;

? ? SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;

? ? SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;

? ? SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;

? ? SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;

? ? SPI_InitStructure.SPI_NSS = SPI_NSS_Hard;

? ? SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16;

? ? SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;

? ? SPI_InitStructure.SPI_CRCPolynomial = 7;

? ? SPI_Init(SPI1, &SPI_InitStructure );


? ? SPI_Cmd(SPI1, ENABLE );

//? ? //PC4:LCD_DC

//? ? //PC5:LCD_RESET

//? ? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;

//? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

//? ? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

//? ? GPIO_Init(GPIOC, &GPIO_InitStructure);

//? ? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;

//? ? GPIO_Init(GPIOC, &GPIO_InitStructure);

}

void DMA_Tx_Init(DMA_Channel_TypeDef *DMA_CHx, u32 ppadr, u32 memadr, u16 bufsize)

{

? ? DMA_InitTypeDef DMA_InitStructure = {0};


? ? RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);


? ? DMA_DeInit(DMA_CHx);


? ? DMA_InitStructure.DMA_PeripheralBaseAddr = ppadr;

? ? DMA_InitStructure.DMA_MemoryBaseAddr = memadr;

? ? DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;

? ? DMA_InitStructure.DMA_BufferSize = bufsize;

? ? DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

? ? DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;

? ? DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;

? ? DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;

? ? DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;

? ? DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;

? ? DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

? ? DMA_Init(DMA_CHx, &DMA_InitStructure);


? ? DMA_ClearFlag(DMA1_FLAG_TC5);

}

void DMA_Rx_Init( DMA_Channel_TypeDef* DMA_CHx, u32 ppadr, u32 memadr, u16 bufsize )

{

? ? DMA_InitTypeDef DMA_InitStructure={0};


? ? RCC_AHBPeriphClockCmd( RCC_AHBPeriph_DMA1, ENABLE );


? ? DMA_DeInit(DMA_CHx);


? ? DMA_InitStructure.DMA_PeripheralBaseAddr = ppadr;

? ? DMA_InitStructure.DMA_MemoryBaseAddr = memadr;

? ? DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;

? ? DMA_InitStructure.DMA_BufferSize = bufsize;

? ? 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_Circular;

? ? DMA_InitStructure.DMA_Priority = DMA_Priority_High;

? ? DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

? ? DMA_Init( DMA_CHx, &DMA_InitStructure );


//? ? DMA_ITConfig(DMA_CHx, DMA_IT_TC, ENABLE);

}

void TestSpi()

{

? ? u8 TxData[32];

? ? u8 RxData[32];

? ? for (u8 i = 0;i<32; i ++)

? ? ? ? TxData[i] = 0xC0+i;

? ? Spi1_InitSlave();

? ? printf("TestSpi\r\n");


? ? while (1)

? ? {

? ? ? ? DMA_Tx_Init( DMA1_Channel3, (u32)&SPI1->DATAR, (u32)TxData, 32);

? ? ? ? DMA_Rx_Init( DMA1_Channel2, (u32)&SPI1->DATAR, (u32)RxData, 32);

? ? ? ? DMA_Cmd( DMA1_Channel3, ENABLE );

? ? ? ? DMA_Cmd( DMA1_Channel2, ENABLE );

? ? ? ? printf("wait TC2&TC3\r\n");

//? ? ? ? while (DMA_GetITStatus(DMA1_IT_TC2) == RESET) ;

? ? ? ? while( (!DMA_GetFlagStatus(DMA1_FLAG_TC2)) &&? (!DMA_GetFlagStatus(DMA1_FLAG_TC3)) ); <---這里卡住了

? ? ? ? printf("wait BSY\r\n");

? ? ? ? while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY)) ;

? ? ? ? Dump_HexLine(RxData,? 32);

? ? ? ? Delay_Ms(500);


? ? }

}



熱門產(chǎn)品 : USB3.0 HUB控制器:CH634

您好,附件例程是V203作為SPI從機使用DMA接收的例程,V305基本也是一樣的,可以參考一下。后續(xù)若有問題可郵箱(lzs@wch.cn)溝通

icon_rar.gifCH32V203 SPI2從機DMA接收.zip



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