sama5d3 环境检测 adc测试

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>

//逻辑通道和物理通道的对应关系
//channel7 ain0

//channel6 ain1

//channel3 ain2

//channel4 ain3

//channel5 ain4

//channel2 ain5

//channel1 ain6

//channel0 ain7

int main(int argc, char *argv)
{

    int i, n, fd;
        int ret;
        unsigned short val[8];
       
        fd = open("/dev/ad7927", O_RDWR);               //打开设备
        
    if (fd < 0)
        {
            printf("can't open /dev/ad7927! ");
            exit(1);
        }

        ret = read(fd, val, 8*sizeof(unsigned short)); //读取

        if(ret > 0)
        {

            for(i=0;i<8;i++)

             printf("channel=%d,result = %x ",
            (val[i]&0xe000)>>13, val[i]&0x1fff);

        }
   
    sleep(10);
    return 0;
 }