unsigned long ADS1256ReadData(unsigned char channel) { unsigned long sum=0; char i; unsigned long r=0; while(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_1));//当ADS1256_DRDY为低时才能写寄存器 ADS1256WREG(ADS1256_MUX,channel); //设置通道 CS_L;//CS_0(); SPI_WriteByte(ADS1256_CMD_SYNC);//外同步AD信号，启动转换 SPI_WriteByte(ADS1256_CMD_WAKEUP);//完成同步并退出待机模式 while(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_1)); SPI_WriteByte(ADS1256_CMD_RDATA); delay_ms(1); for(i=0;i<3;i++) { sum = sum << 8; r = SPI_ReadByte(); sum |= r; } CS_H;//CS_1(); if (sum>0x7FFFFF) // if MSB=1, { PolarFlag = 1; sum -= 0x1000000; // do 2's complement } else PolarFlag = 0; if( sum & 0x800000 ) { sum = ~(unsigned long)sum; sum &= 0x7fffff; sum += 1; // sum = -sum; } return sum; } 这段代码是由stm32f103c8t6控制的,你能帮我改成用stm32f4zet6控制吗

当然可以帮你修改代码以适配STM32F4ZET6控制器。下面是修改后的代码：

uint32_t ADS1256ReadData(uint8_t channel)
{
    uint32_t sum = 0;
    uint8_t i;
    uint32_t r = 0;

    while(GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_1)); // 当ADS1256_DRDY为低时才能写寄存器
    ADS1256WREG(ADS1256_MUX, channel); // 设置通道
    CS_L; // CS_0();
    SPI_WriteByte(ADS1256_CMD_SYNC); // 外同步AD信号，启动转换
    SPI_WriteByte(ADS1256_CMD_WAKEUP); // 完成同步并退出待机模式
    while(GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_1));
    SPI_WriteByte(ADS1256_CMD_RDATA);
    delay_ms(1);

    for(i = 0; i < 3; i++)
    {
        sum = sum << 8;
        r = SPI_ReadByte();
        sum |= r;
    }

    CS_H; // CS_1();

    if(sum > 0x7FFFFF) // if MSB=1,
    {
        PolarFlag = 1;
        sum -= 0x1000000; // do 2's complement
    }
    else
    {
        PolarFlag = 0;
    }

    if(sum & 0x800000)
    {
        sum = ~(uint32_t)sum;
        sum &= 0x7FFFFF;
        sum += 1;
//      sum = -sum;
    }

    return sum;
}

这段代码只是将数据类型 `unsigned long` 替换为 `uint32_t`，并根据注释中的提示进行相应的修改。请确保你的 `ADS1256WREG`、`SPI_WriteByte`、`SPI_ReadByte` 和 `delay_ms` 函数已经正确实现，并且与STM32F4ZET6控制器相兼容。