用51写tlc2543低位先传

以下是51单片机通过SPI协议驱动TLC2543进行低位先传输的示例代码：

#include <reg51.h>

#define SCK P3_5
#define SDI P3_6
#define SDO P3_7
#define CS P3_4

unsigned char SPI_Read() {
    unsigned char i, dat = 0;
    for (i = 0; i < 8; i++) {
        SCK = 0;
        dat <<= 1;
        if (SDO) dat |= 0x01;
        SCK = 1;
    }
    return dat;
}

void SPI_Write(unsigned char dat) {
    unsigned char i;
    for (i = 0; i < 8; i++) {
        SCK = 0;
        if (dat & 0x80) SDI = 1;
        else SDI = 0;
        dat <<= 1;
        SCK = 1;
    }
}

void TLC2543_Init() {
    CS = 1;
    SCK = 1;
}

unsigned int TLC2543_Read(unsigned char channel) {
    unsigned char i;
    unsigned int result = 0;
    
    CS = 0;  // 使能片选
    SPI_Write(0x80 | (channel << 4));  // 发送指令字节
    for (i = 0; i < 2; i++) {
        result <<= 8;
        result |= SPI_Read();  // 读取数据字节
    }
    CS = 1;  // 禁止片选
    
    return result;
}

void main() {
    unsigned int adc_value;
    
    TLC2543_Init();
    
    while (1) {
        adc_value = TLC2543_Read(0);  // 读取通道0的ADC值
        // 处理ADC值
    }
}