基于32F103配置AD7689依次读取7通道数据程序

以下是基于STM32F103配置AD7689并依次读取7个通道数据的示例程序：

#include "stm32f10x.h"

#define SPI_RCC           RCC_APB2Periph_SPI1
#define SPI_GPIO_RCC      RCC_APB2Periph_GPIOA
#define SPI_PORT          GPIOA
#define SPI_PIN_SCK       GPIO_Pin_5
#define SPI_PIN_MISO      GPIO_Pin_6
#define SPI_PIN_MOSI      GPIO_Pin_7

void SPI_Configuration(void)
{
    SPI_InitTypeDef SPI_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(SPI_RCC | SPI_GPIO_RCC, ENABLE);

    GPIO_InitStructure.GPIO_Pin = SPI_PIN_SCK | SPI_PIN_MOSI;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(SPI_PORT, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = SPI_PIN_MISO;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(SPI_PORT, &GPIO_InitStructure);

    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
    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_2;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(SPI1, &SPI_InitStructure);

    SPI_Cmd(SPI1, ENABLE);
}

uint16_t SPI_ReadWrite(uint16_t data)
{
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
    SPI_I2S_SendData(SPI1, data);

    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
    return SPI_I2S_ReceiveData(SPI1);
}

void AD7689_Configuration(void)
{
    // 这里根据AD7689的配置要求设置相应的寄存器值
    // 参考AD7689的数据手册进行配置
    uint16_t configByte = 0xF324;

    // 发送配置字节到AD7689
    GPIO_ResetBits(GPIOA, GPIO_Pin_4);  // 选中AD7689
    SPI_ReadWrite(configByte);           // 发送配置字节
    GPIO_SetBits(GPIOA, GPIO_Pin_4);    // 取消选中AD7689
}

uint16_t AD7689_ReadChannel(uint8_t channel)
{
    uint16_t readCommand = 0x8000 | (channel << 12);
    uint16_t result;

    GPIO_ResetBits(GPIOA, GPIO_Pin_4);    // 选中AD7689
    SPI_ReadWrite(readCommand);            // 发送读取命令

    // 等待转换完成
    while (GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_3) == Bit_RESET);

    result = SPI_ReadWrite(0x0000);        // 读取转换结果
    GPIO_SetBits(GPIOA, GPIO_Pin_4);      // 取消选中AD7689

    return result;
}

int main(void)
{
    uint8_t channel;
    uint16_t data;

    // 初始化SPI和AD7689
    SPI_Configuration();
    AD7689_Configuration();

    while (1)
    {
        for (channel = 0; channel <= 6; channel++)
        {
            data = AD7689_ReadChannel(channel);
            // 这里可以对读取到的数据进行处理或存储
        }
    }
}

请注意，以上示例程序仅供参考，并且假设您已正确连接STM32F103和AD7689，并正确配置了引脚和寄存器。具体的引脚配置和寄存器设置可能会根据您的硬件环境和需求而有所不同。在实际使用时，请根据STM32F103和AD7689的数据手册进行相应的调整和修改。