STM32-Touch Screen Experiment

u8 Read_ADS(u16 *x,u16 *y); //Bidirectional read with discard
u8 Read_ADS2(u16 *x,u16 *y); //Bidirectional coordinate read with enhanced filtering
u16 ADS_Read_XY(u8 xy); //Coordinate read with filtering (single direction)
u16 ADS_Read_AD(u8 CMD); //Read AD conversion value
void ADS_Write_Byte(u8 num); //Write a data to the control chip void
Drow_Touch_Point(u8 x,u16 y); //Draw a coordinate called a point
void Draw_Big_Point(u8 x,u16 y); //Draw a big point
void Touch_Adjust(void); //Touch screen calibration
void Save_Adjdata(void); //Save calibration parameters
u8 Get_Adjdata(void); //Read calibration parameters
void Pen_Int_Set(u8 en); //PEN interrupt enable/disable
void Convert_Pos(void); //Result conversion function

The above are the main functions in touch.c:

1.void Touch_Init(void); //Initialization

        Contains clock initialization, EXTI1 interrupt setting, enables interrupt on line1, and sets falling edge trigger

2.u8 Read_ADS(u16 *x,u16 *y); //Bidirectional reading with discard

         Single read coordinate function

3.u8 Read_ADS2(u16 *x,u16 *y); //Bidirectional coordinate reading with enhanced filtering

         Secondary reading of coordinates

4.u16 ADS_Read_XY(u8 xy); //Coordinate reading with filtering (single direction)

         Read READ_TIMES times of data continuously, sort them in ascending order, remove the lowest and highest LOST_VAL numbers, and take the average value

5.u16 ADS_Read_AD(u8 CMD); //Read AD conversion value

6.void ADS_Write_Byte(u8 num); //Write a data to the control chip

7.void Drow_Touch_Point(u8 x,u16 y);//Draw a coordinate called a touch point

8.void Draw_Big_Point(u8 x,u16 y); //Draw a big point

         Drawing and writing functions

9.void Touch_Adjust(void); //Touch screen calibration

10.void Save_Adjdata(void); //Save calibration parameters

         The calibrated coordinate parameters are saved in 2401

11.void Pen_Int_Set(u8 en); //PEN interrupt enable/disable

          The interrupt is triggered when the touch screen is pressed. You can use this function to temporarily turn off the interrupt and turn it on again after the drawing is completed.

12.void Convert_Pos(void); //Result conversion function

          The coordinates read by the touch screen are physical coordinates, and the coordinates used in the program are LCD pixel coordinates. This function is used as a conversion

There is a problem in the main function. I saw many people asked this question in the forum:

This is a question post in the forum, related posts and solutions: http://www.openedv.com/posts/list/1813.htm Please study it when you need it.

In the Battleship version of the Zhengdian Atom routine, PEN is not used as a judgment condition, which avoids this problem: