Detailed Description

EFM32GG_DK3750, Touch panel driver.

Version: 5.1.1

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"

Go to the source code of this file.

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. More...

void	TOUCH_CallUpcall (void)
	Function that calls registered upcall.

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

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

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

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

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

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