Detailed Description

Touch panel driver for DK3650, DK3750 and DK3850 Development Kits.

Data Structures
struct	TOUCH_Config_TypeDef

struct	TOUCH_Pos_TypeDef

Macros
#define	ADC_X adcSingleInpCh1

#define	ADC_Y adcSingleInpCh4

#define	TOUCH_INIT_DEFAULT

#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

Typedefs
typedef void(	TOUCH_Upcall_TypeDef ) ( TOUCH_Pos_TypeDef *)

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)

Variables
MATRIX	calibrationMatrix = { 103800, 2048, -8184704, -384, 102144, -16424640, 287650 }

Macro Definition Documentation

#define ADC_X adcSingleInpCh1

Input channel 1

Definition at line 63 of file touch.c .

Referenced by ADC0_IRQHandler() .

#define ADC_Y adcSingleInpCh4

Input channel 4

Definition at line 64 of file touch.c .

Referenced by ADC0_IRQHandler() , and TOUCH_Init() .

#define TOUCH_INIT_DEFAULT

Value:

         { 500000,
         
          /* 500kHz sampling frequency */
         
         \
        
         1,
         
          /* Ignore moves not greater than 1 pixel */
         
         \
        
         adcOvsRateSel128,
         
          /* Oversampling 128 times */
         
         \
        
         }

Initializes Touch default values

Definition at line 76 of file touch.h .

#define TOUCH_X1_PIN 5

Pin 5

Definition at line 68 of file touch.c .

Referenced by ADC0_IRQHandler() .

#define TOUCH_X1_PORT gpioPortD

Port D

Definition at line 67 of file touch.c .

Referenced by ADC0_IRQHandler() .

#define TOUCH_X2_PIN 4

Pin 4

Definition at line 70 of file touch.c .

Referenced by ADC0_IRQHandler() , and TOUCH_IsBusy() .

#define TOUCH_X2_PORT gpioPortD

Port D

Definition at line 69 of file touch.c .

Referenced by ADC0_IRQHandler() , and TOUCH_IsBusy() .

#define TOUCH_Y1_PIN 3

Pin 3

Definition at line 72 of file touch.c .

Referenced by ADC0_IRQHandler() .

#define TOUCH_Y1_PORT gpioPortD

Port D

Definition at line 71 of file touch.c .

Referenced by ADC0_IRQHandler() .

#define TOUCH_Y2_PIN 1

Pin 1

Definition at line 74 of file touch.c .

Referenced by ADC0_IRQHandler() .

#define TOUCH_Y2_PORT gpioPortD

Port D

Definition at line 73 of file touch.c .

Referenced by ADC0_IRQHandler() .

Typedef Documentation

typedef void( TOUCH_Upcall_TypeDef) ( TOUCH_Pos_TypeDef *)

touch panel upcall type definition

Definition at line 83 of file touch.h .

Enumeration Type Documentation

enum TOUCH_State_TypeDef

touch driver states

Definition at line 77 of file touch.c .

Function Documentation

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.

ADC0 IRQ Handler

Definition at line 255 of file touch.c .

References ADC_X , ADC_Y , TOUCH_Pos_TypeDef::adcx , TOUCH_Pos_TypeDef::adcy , TOUCH_Pos_TypeDef::pen , TOUCH_CallUpcall() , TOUCH_RecalculatePosition() , TOUCH_StateChanged() , TOUCH_X1_PIN , TOUCH_X1_PORT , TOUCH_X2_PIN , TOUCH_X2_PORT , TOUCH_Y1_PIN , TOUCH_Y1_PORT , TOUCH_Y2_PIN , TOUCH_Y2_PORT , TOUCH_Pos_TypeDef::x , and TOUCH_Pos_TypeDef::y .