exc7200.c

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/* Includes ------------------------------------------------------------------*/
#include "exc7200.h"

/* Private typedef -----------------------------------------------------------*/

/* Private define ------------------------------------------------------------*/

/* Private macro -------------------------------------------------------------*/

/* Private variables ---------------------------------------------------------*/

/* Touch screen driver structure initialization */  
TS_DrvTypeDef exc7200_ts_drv = 
{
  exc7200_Init,
  exc7200_ReadID,
  exc7200_Reset,
  
  exc7200_TS_Start,
  exc7200_TS_DetectTouch,
  exc7200_TS_GetXY,
  
  exc7200_TS_EnableIT,
  exc7200_TS_ClearIT,
  exc7200_TS_ITStatus,
  exc7200_TS_DisableIT,
};

uint8_t aBufferTS[10];

/* Private function prototypes -----------------------------------------------*/

/* Private functions ---------------------------------------------------------*/

void exc7200_Init(uint16_t DeviceAddr)
{
  /* Initialize IO BUS layer */
  IOE_Init(); 
  
}
 
void exc7200_Reset(uint16_t DeviceAddr)
{

}

uint16_t exc7200_ReadID(uint16_t DeviceAddr)
{
  return 0;
}

void exc7200_TS_Start(uint16_t DeviceAddr)
{
}

uint8_t exc7200_TS_DetectTouch(uint16_t DeviceAddr)
{
  /* Read TS data : Send I2C Slave address + 1 Bit0=1 for:read */
  IOE_ReadMultiple(DeviceAddr | 1, EXC7200_READ_CMD, aBufferTS, 10);  

  /* check for first byte */
  if (aBufferTS[1]==0x83)
  { 
    return 1;
  }
  
  return 0;
}

void exc7200_TS_GetXY(uint16_t DeviceAddr, uint16_t *X, uint16_t *Y)
{
  /* Calculate positions */
  *X = (((aBufferTS[3]&0x00ff) << 4) | ((aBufferTS[2]&0x00f0) >> 4)) << 1;
  *Y = (((aBufferTS[5]&0x00ff) << 4) | ((aBufferTS[4]&0x00f0) >> 4)) << 1;
  
  /* Dummy Read to deactivate read mode */
  IOE_ReadMultiple(DeviceAddr, EXC7200_READ_CMD, aBufferTS, 10);    
}

void exc7200_TS_EnableIT(uint16_t DeviceAddr)
{  
}

void exc7200_TS_DisableIT(uint16_t DeviceAddr)
{
}

uint8_t exc7200_TS_ITStatus(uint16_t DeviceAddr)
{
  return 0;
}

void exc7200_TS_ClearIT(uint16_t DeviceAddr)
{
}

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/