关于3.5寸触摸屏（型号：K350QVG-V1-F）在TOUCH.C程序里：
//*****************************************************************************
//
// The coefficients used to convert from the ADC touch screen readings to the
// screen pixel positions.
//
//*****************************************************************************
#ifdef PORTRAIT//纵向
#define M0 480
#define M1 77856
#define M2 -22165152
#define M3 86656
#define M4 1792
#define M5 -19209728
#define M6 199628
#endif
#ifdef LANDSCAPE//横向
#define M0 86784
#define M1 -1536
#define M2 -17357952
#define M3 -144
#define M4 -78576
#define M5 69995856
#define M6 201804
#endif
#ifdef PORTRAIT_FLIP//纵向 翻转
#define M0 -864
#define M1 -79200
#define M2 70274016
#define M3 -85088
#define M4 1056
#define M5 80992576
#define M6 199452
#endif
#ifdef LANDSCAPE_FLIP//横向 翻转
#define M0 -83328
#define M1 1664
#define M2 78919456
#define M3 -336
#define M4 80328
#define M5 -22248408
#define M6 198065
#endif
//*****************************************************************************
请问M0到M6的值是如何确定？
