touch.h

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/***************************************************************************/
#ifndef __TOUCH_H
#define __TOUCH_H

#include "em_device.h"
#include "em_adc.h"
#include "calibrate.h"

/***************************************************************************/
/***************************************************************************/
#ifdef __cplusplus
extern "C" {
#endif

#define TOUCH_IDLE         0
#define TOUCH_BUSY_PRESSED 1
#define TOUCH_BUSY_CHECK   2
#define TOUCH_BUSY_SCAN    3

typedef struct
{ uint16_t x;           
  uint16_t y;           
  uint16_t adcx;        
  uint16_t adcy;        
  uint8_t  pen;         
} TOUCH_Pos_TypeDef;

typedef struct
{ uint32_t               frequency;     
  uint8_t                ignore;        
  ADC_OvsRateSel_TypeDef oversampling;  
} TOUCH_Config_TypeDef;

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

typedef void (TOUCH_Upcall_TypeDef)(TOUCH_Pos_TypeDef *);

void TOUCH_Init(TOUCH_Config_TypeDef *config);
void TOUCH_RegisterUpcall(TOUCH_Upcall_TypeDef *new_upcall);
TOUCH_Pos_TypeDef *TOUCH_GetPos(void);
int TOUCH_CalibrationTable(POINT * displayPtr, POINT * screenPtr);
int TOUCH_IsBusy(void);

#ifdef __cplusplus
}
#endif

#endif