Touch x,y coordinates not changing the screen !

[MMARI.1]

hi ,

currently working on touchGFX(without RTOS)+stm32h723zgt6+ltdc display .

First Screen1 is coming  with touchGFX  but touch x,y coordinates not changing the screen2.

touchGFX screen1 interaction made as follows .

i do not attached any touch sensor ! instead of touch sensor i made manual touch x ,y coordinates input by following code . due to manual matrix key button for future use . 

touch.c as follows

#include "Touch_Sensor.h"

bool touch_values(uint32_t *touch_x, uint32_t *touch_y)
{
	if(gate)
	{
		*touch_x=tempx;
		*touch_y=tempy;
		return true;
	}
	return false;

}

 touch.h as follows 

#ifndef TOUCH_SENSOR_H_
#define TOUCH_SENSOR_H_

#ifdef __cplusplus
extern "C" {
#endif

#include "stdint.h"
#include "stdbool.h"

extern volatile uint32_t tempx;
extern volatile	uint32_t tempy;
extern volatile uint32_t gate;

extern bool touch_values(uint32_t *touch_x, uint32_t *touch_y);


#ifdef __cplusplus
}
#endif


#endif /* TOUCH_SENSOR_H_ */

STM32touchController.CPP as follows 

bool STM32TouchController::sampleTouch(int32_t& x, int32_t& y)
{
    /**
     * By default sampleTouch returns false,
     * return true if a touch has been detected, otherwise false.
     *
     * Coordinates are passed to the caller by reference by x and y.
     *
     * This function is called by the TouchGFX framework.
     * By default sampleTouch is called every tick, this can be adjusted by HAL::setTouchSampleRate(int8_t);
     *
     */
	uint32_t m; uint32_t n;
	if(touch_values(&m, &n))
	{
		x=m;
		y=n;
		return true;

	}
	return false;
}

main.c 

volatile uint32_t tempx=0;  //// declared in glopal
volatile uint32_t tempy=0;  //// declared in glopal
volatile uint32_t gate=0;  //// declared in glopal 


 MX_TouchGFX_Process();
    /* USER CODE BEGIN 3 */
  if(gate==1){tempx=234; tempy=136; gate=0;  }
  if(gate==2){tempx=0; tempy=0; gate=0;}

i am trying to give x, y coordinates  manually but no screen change .