编写STM32采集ADS1256数据通过DMA直接传输程序

好的，这里是一个简单的参考实现，仅供参考：

#include "stm32f10x.h"
#include "stm32f10x_spi.h"
#include "stm32f10x_dma.h"

#define SPI_CLK  1000000  // SPI时钟频率
#define DMA_BUF_SIZE  1024  // DMA传输缓冲区大小

uint8_t dma_buffer[DMA_BUF_SIZE];  // DMA传输缓冲区

void SPI_Configuration(void)
{
    SPI_InitTypeDef SPI_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1, ENABLE);

    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    SPI_Cmd(SPI1, DISABLE);

    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    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_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_32;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(SPI1, &SPI_InitStructure);

    SPI_Cmd(SPI1, ENABLE);
}

void DMA_Configuration(void)
{
    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) dma_buffer;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
    DMA_InitStructure.DMA_BufferSize = DMA_BUF_SIZE;
    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_Circular;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA1_Channel3, &DMA_InitStructure);

    DMA_Cmd(DMA1_Channel3, ENABLE);
}

void ADS1256_Configuration(void)
{
    // 根据ADS1256芯片的通信协议，配置SPI控制寄存器
    // ...

    // 发送启动转换命令
    // ...
}

void Data_Processing(uint8_t *data, uint16_t size)
{
    // 处理采集到的数据
    // ...
}

int main(void)
{
    SPI_Configuration();
    DMA_Configuration();
    ADS1256_Configuration();

    while (1)
    {
        // 等待DMA传输完成
        while (DMA_GetFlagStatus(DMA1_FLAG_TC3) == RESET);

        // 处理采集到的数据
        Data_Processing(dma_buffer, DMA_BUF_SIZE);

        // 重置DMA传输标志位
        DMA_ClearFlag(DMA1_FLAG_TC3);
    }
}

需要注意的是，该实现仅为参考，具体实现需要根据具体芯片型号和通信协议进行调整。建议您参考相关资料和官方文档进行开发。