License

This file is licensed under the Silabs License Agreement. See the file "Silabs_License_Agreement.txt" for details. Before using this software for any purpose, you must agree to the terms of that agreement.

Definition in file touch.c .


       #include <stdlib.h>


       #include <string.h>


       #include "
       
        em_device.h
       
       "


       #include "
       
        em_adc.h
       
       "


       #include "
       
        em_gpio.h
       
       "


       #include "
       
        em_cmu.h
       
       "


       #include "
       
        touch.h
       
       "


       #include "calibrate.h"


       #include "
       
        bsp.h
       
       "


       #include "
       
        i2cspm.h
       
       "


       #include "
       
        eeprom.h
       
       "

Macros
#define	ADC_X adcSingleInpCh1

#define	ADC_Y adcSingleInpCh4

#define	TOUCH_X1_PIN 5

#define	TOUCH_X1_PORT gpioPortD

#define	TOUCH_X2_PIN 4

#define	TOUCH_X2_PORT gpioPortD

#define	TOUCH_Y1_PIN 3

#define	TOUCH_Y1_PORT gpioPortD

#define	TOUCH_Y2_PIN 1

#define	TOUCH_Y2_PORT gpioPortD

Enumerations
enum	TOUCH_State_TypeDef { TOUCH_INIT , TOUCH_CHECK_PRESS , TOUCH_MEASURE_X , TOUCH_MEASURE_Y }

Functions
void	ADC0_IRQHandler (void)
	Interrupt handler is executed with frequency ~28Hz when panel is not pressed and with frequency ~140Hz when panel is pressed - this will give ~50 readings per second.

int	TOUCH_CalibrationTable (POINT displayPtr, POINT screenPtr)
	Set calibration table.

void	TOUCH_CallUpcall (void)
	Function that calls registered upcall.

TOUCH_Pos_TypeDef *	TOUCH_GetPos (void)
	Returns current touch position and state.

void	TOUCH_Init ( TOUCH_Config_TypeDef *config)
	Initialize touch panel driver.

int	TOUCH_IsBusy (void)
	Check status of the touch panel.

void	TOUCH_RecalculatePosition (volatile TOUCH_Pos_TypeDef *pos)
	Convert ADC readings into XY position.

void	TOUCH_RegisterUpcall ( TOUCH_Upcall_TypeDef *new_upcall)
	Register upcall which will be call every position or state change.

int	TOUCH_StateChanged (void)
	Check if cursor state changed (down or move)