一段小程序，方便调试I2C_i2c小程序-优快云博客

本文链接：https://blog.youkuaiyun.com/happy_sand/article/details/5893759

本文介绍了一个简单的十六进制字符串转换为十进制数的方法，并通过具体示例展示了如何实现这一转换过程。此外，还提供了一种用于计算两幅图像像素差异的算法，该算法能够量化图像之间的变化程度。

    char param11;
    char param12;
    char param21;
    char param22;

argv[1] = ("a2");
argv[2] = ("fa");

    printf("%x %x /n", atoi(argv[1]), atoi(argv[2]));

    if ( ('a'<=argv[1][0]) && (argv[1][0] <='f') )
    {
        param11 = argv[1][0]-'a'+ 10;
    }
    else
    {
        param11 = argv[1][0]-'0';
    }

    if ( ('a'<=argv[1][1]) && (argv[1][1] <='f') )
    {
        param12 = argv[1][1]-'a'+ 10;
    }
    else
    {
        param12 = argv[1][1]-'0';
    }
////////////////
    if ( ('a'<=argv[2][0]) && (argv[2][0] <='f') )
    {
        param21 = argv[2][0]-'a'+ 10;
    }
    else
    {
        param21 = argv[2][0]-'0';
    }

    if ( ('a'<=argv[2][1]) && (argv[2][1] <='f') )
    {
        param22 = argv[2][1]-'a'+ 10;
    }
    else
    {
        param22 = argv[2][1]-'0';
    }

printf("%x %x", param12 + param11*16, param22 + param21*16);
system("pause &");

typedef struct motionDetectTable
{
int value;
int width;
}motionDetectTable;

motionDetectTable motionTable[]
{
    {12800, 640},
    {12000, 352},
    {12800, 288},
};

int ChzGetMotionDetectValue(const char *pSrcCur, const char *pSrcFormer, const int width, const int height)
{
    int     i;
    int     PixelDiff;
    int     Sum = 0;
    for(i=1; i<width*height;)
    {
        PixelDiff = *(pSrcFormer+i) - *(pSrcCur+i);
        if (PixelDiff >= 0)
        {
            Sum = Sum+PixelDiff;
        }
        else
        {
            Sum = Sum-PixelDiff;
        }
        i = i+2;
    }
    return Sum;
}