菜鸟请教一下mini6410ADC的问题

int fd = open("/dev/adc", 0);
if (fd < 0) {
        perror("open ADC device:");
        return 1;
    }
    for(;;) {
        char buffer[30];
        int len = read(fd, buffer, sizeof buffer -1);
        if (len > 0) {
            buffer[len] = '\0';
            int value = -1;
            sscanf(buffer, "%d", &value);
            printf("ADC Value: %d\n", value);
        } else {
            perror("read ADC device:");
            return 1;
就是6410给的例子程序，换一个AIN口如何修改