Tiny210 V2 一线裸机程序，可以调背光，但读不出触摸数据，附代码

源码修改自：http://aiothome.net/read.php?tid-13182.html

复制代码 #define GPH1CON            (*(volatile unsigned long *)0xE0200C20) #define GPH1DAT            (*(volatile unsigned long *)0xE0200C24) #define        PWMTIMER_BASE            (0xE2500000) #define        TCFG0        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x00)) ) #define        TCFG1        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x04)) ) #define        TCON          ( *((volatile unsigned long *)(PWMTIMER_BASE+0x08)) ) #define        TCNTB0        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x0C)) ) #define        TCMPB0        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x10)) ) #define        TCNTO0        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x14)) ) #define        TCNTB1        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x18)) ) #define        TCMPB1        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x1C)) ) #define        TCNTO1        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x20)) ) #define        TCNTB2        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x24)) ) #define        TCMPB2        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x28)) ) #define        TCNTO2        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x2C)) ) #define        TCNTB3        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x30)) ) #define        TCMPB3        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x34)) ) #define        TCNTO3        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x38)) ) #define        TCNTB4        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x3C)) ) #define        TCNTO4        ( *((volatile unsigned long *)(PWMTIMER_BASE+0x40)) ) #define        TINT_CSTAT     ( *((volatile unsigned long *)(PWMTIMER_BASE+0x44)) ) #define REQ_TS   0x40U #define REQ_INFO 0x60U typedef struct {     unsigned short x;                   //x坐标     unsigned short y;                   //y坐标 }TS_RET; TS_RET TS_points; static void set_pin_as_input(void) {       GPH1CON &= ~ (3<<8); } static void set_pin_as_output(void) {     GPH1CON &= ~ (3<<8);     GPH1CON |= 1<<8; } static void set_pin_value(int v) {     if (v) {         GPH1DAT |= 1<<2;     } else {         GPH1DAT &= ~(1<<2);     } } static int get_pin_value(void) {     if(GPH1DAT & (1<<2))         return 1;     else         return 0; } static void InitTimer(void) {     TCFG0 &= ~0xf0;     TCFG0 |= 65<<8;     TCFG1 &= ~(0xf<<12);     TCNTB3 = 104;     TCMPB3 = 104;     TCON |= 1<<17;     TCON &= ~(1<<17);     TCON &= ~(0x1f<<16);     TCON |= (1<<19);     TINT_CSTAT |= 1<<3; } static void StartTimer(void) {       TCON |= (1<<16); } static void StopTimer(void) {    TCON &= ~(1<<16);/* 停止定时器3 */ } static void WaitTimerTick(void) {     while ((TINT_CSTAT & (1U << 8)) == 0) ;     TINT_CSTAT |= 1<<8; } static unsigned char crc8(unsigned v, unsigned len); static int OneWireSession(unsigned char req, unsigned char res[]) {     unsigned Req;     unsigned *Res;     unsigned int i;     Req = (req << 24) | (crc8(req << 24, 8) << 16);     Res = (unsigned *)res;     set_pin_value(1);     set_pin_as_output();     StartTimer();     for (i = 0; i < 60; i++) {         WaitTimerTick();     }     set_pin_value(0);     for (i = 0; i < 2; i++) {         WaitTimerTick();     }     for (i = 0; i < 16; i++) {         int v = !!(Req & (1U << 31));         Req <<= 1;         set_pin_value(v);         WaitTimerTick();     }     WaitTimerTick();     set_pin_as_input();     WaitTimerTick();     for (i = 0; i < 32; i++) {         (*Res) <<= 1;         (*Res) |= get_pin_value();         WaitTimerTick();     }     StopTimer();     set_pin_value(1);     set_pin_as_output();     return crc8(*Res, 24) == res[0]; } static int TryOneWireSession(unsigned char req, unsigned char res[]) {     int i;     for (i = 0; i < 3; i++) {         if (OneWireSession(req, res)) {             return 1;         }     }     return 0; } void InitOneWire(void) {     InitTimer(); } int GetInfo(unsigned char *Lcd, unsigned short *FirmwareVer) {     unsigned char res[4];     if (!TryOneWireSession(REQ_INFO, res)) {         return 0;     }     *Lcd = res[3];     *FirmwareVer = res[2] * 100 + res[1];     return 1; } int SetBacklightOfLCD(unsigned Brightness) {     unsigned char res[4];     int ret;     if (Brightness > 127) {         Brightness = 127;     }     ret = TryOneWireSession(Brightness | 0x80U, res);     return ret; } static unsigned char crc8(unsigned v, unsigned len) {     unsigned char crc = 0xACU;     while (len--) {         if ((crc & 0x80U) != 0) {             crc <<= 1;             crc ^= 0x7U;         } else {             crc <<= 1;         }         if ((v & (1U << 31)) != 0) {             crc ^= 0x7U;         }         v <<= 1;     }     return crc; } void ARM1Wire_SET_Backlight(unsigned Brightness) {     //InitOneWire();     SetBacklightOfLCD(Brightness); } #define level    ((3770-317)/(480)) #define vertical ((3839-192)/(272)) int ARM1Wire_GET_XY(int *x,int *y) {     int ret;     unsigned char res[4];     unsigned short x1,y1;     //unsigned char pressed;     //unsigned int  ts_status;         ret = TryOneWireSession(0x40U, res);     y1 =  ((res[3] >>   4U) << 8U) + res[2];     x1 =  ((res[3] &  0xFU) << 8U) + res[1];         //pressed = (x != 0xFFFU) && (y != 0xFFFU);     *x= x1;//((x1-200)*480/(3880-200));     *y= y1;//((3772-y1)*272/(3772-324));     //ts_status=((x1 << 16) | (y1)) | (pressed << 31);     return ret; }

InitOneWire（）；                                           // 初始化timer3
ARM1Wire_SET_Backlight(10)   ；             //  屏幕变暗了，证明通信没问题
ARM1Wire_GET_XY(&x,&y)；                     //  但读出的XY总是0xFFF


求教高手如何解决