ucgui移植触摸屏为什么鼠标一直不动

定时器中断
void tiM3_IRQHandler(void)   //TIM3????
{
static u8 j=0;
j++;
   
    if(0!=global_t) global_t--;
   
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET)  //?ì?éTIM3?ü??????·??ú??·?
{
TIM_ClearITPendingBit(TIM3, TIM_IT_Update  );  //????TIMx?ü??????±ê??
GUI_TOUCH_Exec();
//GUI_Exec();//GUI?????ü??
if(j>=50)
{
LED1=!LED1;
j=0;
}
}
}
ucgui触摸屏配置
#ifndef GUITOUCH_CONF_H
#define GUITOUCH_CONF_H
#include "ili93xx.h"
#define GUI_TOUCH_AD_LEFT    210//×?×ó±?x?á??A/D?? ·?×?±ê??
#define GUI_TOUCH_AD_RIGHT   3880   //×???±?x?á??A/D?? ·?×?±ê??
#define GUI_TOUCH_AD_TOP    190//×?×ó±?y?á??A/D?? ·?×?±ê??
#define GUI_TOUCH_AD_BOTTOM  3910//×???±?y?á??A/D?? ·?×?±ê??   
#define GUI_TOUCH_SWAP_XY    1
#define GUI_TOUCH_MIRROR_X   0
#define GUI_TOUCH_MIRROR_Y   1
int  GUI_TOUCH_X_MeasureX(void) {
// u16 x,y;
tp_dev.scan(0);//?¨?è
  return tp_dev.x[0];
}
int  GUI_TOUCH_X_MeasureY(void) {
// u16 x,y;
tp_dev.scan(0);//?¨?è
  return tp_dev.y[0];
}
主程序：
U16 global_t=0;
int main(void)
{
delay_init();      
NVIC_Configuration();
uart_init(9600);
LED_Init();  
KEY_Init();
TP_Init();
TIM3_Int_Init(99,7199);//10Khz,10ms;
GUI_Init();
  GUI_SetBkColor(GUI_BLACK);
GUI_SetColor(GUI_WHITE);
GUI_Clear();
GUI_SetFont(&GUI_Font24_ASCII);
  GUI_DispStringAt("- - STM32F103ZET6 - -",4,10);
  GUI_DispStringAt("- - UCGUI3.98 - -",4,40);
  GUI_DispStringAt("- - SUCCESSFULLY - -",4,70);
  GUI_DispStringAt("- - 2015/03/30 - -",4,100);
  global_t=200;//2S
  while(global_t);
  GUI_Clear();
  GUI_SetFont(&GUI_Font32_ASCII);
  GUI_DispStringHCenterAt("Start Test", 160, 100);
GUI_CURSOR_Show();
while(1)
{
LED0=!LED0;
    GUI_Exec();
}
}