C语言实现ADD8编码校验

代码

#include <stdio.h>

// 计算 ADD8 校验和
unsigned char add8_checksum(const unsigned char* data, size_t length) {
    unsigned int sum = 0;
    for (size_t i = 0; i < length; i++) {
        sum += data[i];
    }
    // 取低 8 位
    return (unsigned char)(sum & 0xFF);
}

int main() {
    // 示例数据
    unsigned char data[] = { 0xAA, 0xED, 0x20, 0x01, 0x00, 0x01, 0x19, 0xD1, 0x01, 0x01, 0x01, 0x31,
                             0x01, 0x01, 0x00, 0x05, 0x15, 0x81, 0x12, 0x11, 0x12,
                             0x13, 0x25, 0x02, 0x03, 0x04, 0x00, 0x10, 0x00, 0x04,
                             0x02, 0x04, 0x31, 0x05, 0x00 };
    size_t data_length = sizeof(data) / sizeof(data[0]);

    // 计算 ADD8 校验和
    unsigned char checksum = add8_checksum(data, data_length);

    // 输出结果
    printf("数据: ");
    for (size_t i = 0; i < data_length; i++) {
        printf("%02X ", data[i]);
    }
    printf("\nADD8 校验和: %02X\n", checksum);

    return 0;
}

运行结果

如果不知道程序中ADD8校验是否正确，可以将我们输入的数据在串口调试助手上进行验证。如下图所示：