写一个详细的stm32F103RC与ADS129X通过SPI通信的代码

好的，下面是一个详细的STM32F103RC与ADS129X通过SPI通信的代码。在此之前，需要先了解ADS129X芯片的寄存器及其功能，以及SPI通信的基本原理。

首先在STM32F103RC上配置SPI总线，以控制ADS129X芯片的通信。

#include "stm32f10x.h"

// SPI总线初始化函数
void SPI_Configuration(void)
{
    SPI_InitTypeDef SPI_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

    // 开启SPI1时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);

    // 开启GPIOA时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    // PA5--SCK, PA6--MISO, PA7--MOSI
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7; 
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // CS引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // SPI参数配置
    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_16;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(SPI1, &SPI_InitStructure);

    // 使能SPI总线
    SPI_Cmd(SPI1, ENABLE);
}

接下来，通过SPI总线完成ADS129X芯片的初始化。

// ADS129X初始化函数
void ADS129X_Init(void)
{
    // 硬件复位ADS129X
    GPIO_ResetBits(GPIOA, GPIO_Pin_4);
    delay_ms(100);
    GPIO_SetBits(GPIOA, GPIO_Pin_4);
    delay_ms(100);

    // 读取ID寄存器，确认芯片正常
    uint8_t id = ADS129X_ReadReg(ADS129X_ID);
    if (id != ADS129X_ID_VALUE)
    {
        // ID寄存器读取错误，芯片异常
        return;
    }

    // 设置配置寄存器
    ADS129X_WriteReg(ADS129X_CONFIG1, ADS129X_CONFIG1_VALUE);
    ADS129X_WriteReg(ADS129X_CONFIG2, ADS129X_CONFIG2_VALUE);
    ADS129X_WriteReg(ADS129X_LOFF, ADS129X_LOFF_VALUE);
    ADS129X_WriteReg(ADS129X_CH1SET, ADS129X_CH1SET_VALUE);
    ADS129X_WriteReg(ADS129X_CH2SET, ADS129X_CH2SET_VALUE);
    ADS129X_WriteReg(ADS129X_RLD_SENS, ADS129X_RLD_SENS_VALUE);
    ADS129X_WriteReg(ADS129X_LOFF_SENS, ADS129X_LOFF_SENS_VALUE);
    ADS129X_WriteReg(ADS129X_LOFF_STAT, ADS129X_LOFF_STAT_VALUE);
    ADS129X_WriteReg(ADS129X_RESP1, ADS129X_RESP1_VALUE);
    ADS129X_WriteReg(ADS129X_RESP2, ADS129X_RESP2_VALUE);
    ADS129X_WriteReg(ADS129X_GPIO, ADS129X_GPIO_VALUE);
    ADS129X_WriteReg(ADS129X_PACE, ADS129X_PACE_VALUE);
    ADS129X_WriteReg(ADS129X_CFG_CAL, ADS129X_CFG_CAL_VALUE);
    ADS129X_WriteReg(ADS129X_MISC1, ADS129X_MISC1_VALUE);
    ADS129X_WriteReg(ADS129X_MISC2, ADS129X_MISC2_VALUE);
    ADS129X_WriteReg(ADS129X_CONFIG3, ADS129X_CONFIG3_VALUE);
    ADS129X_WriteReg(ADS129X_CH3SET, ADS129X_CH3SET_VALUE);
    ADS129X_WriteReg(ADS129X_CH4SET, ADS129X_CH4SET_VALUE);
    ADS129X_WriteReg(ADS129X_RESP3, ADS129X_RESP3_VALUE);
    ADS129X_WriteReg(ADS129X_PACE2, ADS129X_PACE2_VALUE);
    ADS129X_WriteReg(ADS129X_LOFF_SENS2, ADS129X_LOFF_SENS2_VALUE);
    ADS129X_WriteReg(ADS129X_STAT, ADS129X_STAT_VALUE);
    ADS129X_WriteReg(ADS129X_CH5SET, ADS129X_CH5SET_VALUE);
    ADS129X_WriteReg(ADS129X_CH6SET, ADS129X_CH6SET_VALUE);
    ADS129X_WriteReg(ADS129X_LOFF_STAT2, ADS129X_LOFF_STAT2_VALUE);
    ADS129X_WriteReg(ADS129X_MUX, ADS129X_MUX_VALUE);
    ADS129X_WriteReg(ADS129X_CH7SET, ADS129X_CH7SET_VALUE);
    ADS129X_WriteReg(ADS129X_CH8SET, ADS129X_CH8SET_VALUE);
    ADS129X_WriteReg(ADS129X_CFG_EMG, ADS129X_CFG_EMG_VALUE);

    // 启动ADS129X
    ADS129X_WriteReg(ADS129X_CONFIG1, ADS129X_CONFIG1_VALUE | ADS129X_CONFIG1_START);
}

其中，ADS129X_ReadReg和ADS129X_WriteReg函数用于读取和写入ADS129X的寄存器。

// 读取ADS129X的寄存器
uint8_t ADS129X_ReadReg(uint8_t reg)
{
    uint8_t value;

    // 使能ADS129X
    GPIO_ResetBits(GPIOA, GPIO_Pin_4);

    // 发送读取命令和寄存器地址
    SPI_I2S_SendData(SPI1, ADS129X_CMD_RREG | reg);
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);
    SPI_I2S_SendData(SPI1, 0x00);
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);

    // 接收寄存器值
    SPI_I2S_SendData(SPI1, 0x00);
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);
    value = SPI_I2S_ReceiveData(SPI1);

    // 禁用ADS129X
    GPIO_SetBits(GPIOA, GPIO_Pin_4);

    return value;
}

// 写入ADS129X的寄存器
void ADS129X_WriteReg(uint8_t reg, uint8_t value)
{
    // 使能ADS129X
    GPIO_ResetBits(GPIOA, GPIO_Pin_4);

    // 发送写入命令和寄存器地址
    SPI_I2S_SendData(SPI1, ADS129X_CMD_WREG | reg);
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);

    // 发送数据
    SPI_I2S_SendData(SPI1, value);
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);

    // 禁用ADS129X
    GPIO_SetBits(GPIOA, GPIO_Pin_4);
}

最后，可以通过ADS129X_ReadData函数读取ADS129X采集的数据。

// 读取ADS129X采集的数据
void ADS129X_ReadData(uint8_t *data, uint32_t size)
{
    // 使能ADS129X
    GPIO_ResetBits(GPIOA, GPIO_Pin_4);

    // 发送读取命令
    SPI_I2S_SendData(SPI1, ADS129X_CMD_RDATA);
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);

    // 接收数据
    for (uint32_t i = 0; i < size; i++)
    {
        SPI_I2S_SendData(SPI1, 0x00);
        while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);
        data[i] = SPI_I2S_ReceiveData(SPI1);
    }

    // 禁用ADS129X
    GPIO_SetBits(GPIOA, GPIO_Pin_4);
}

以上是一个简单的STM32F103RC与ADS129X通过SPI通信的代码，仅供参考。实际应用中，还需要根据具体需求进行完善和修改。