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/**
******************************************************************************
* @file exc7200.c
* @author MCD Application Team
* @brief This file provides a set of functions needed to manage the EXC7200
* Touch-screen controller.
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "exc7200.h"
/** @addtogroup BSP
* @{
*/
/** @addtogroup Component
* @{
*/
/** @defgroup EXC7200
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/** @defgroup EXC7200_Private_Types_Definitions
* @{
*/
/* Private define ------------------------------------------------------------*/
/** @defgroup EXC7200_Private_Defines
* @{
*/
/* Private macro -------------------------------------------------------------*/
/** @defgroup EXC7200_Private_Macros
* @{
*/
/* Private variables ---------------------------------------------------------*/
/** @defgroup EXC7200_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 -----------------------------------------------*/
/** @defgroup exc7200_Private_Function_Prototypes
* @{
*/
/* Private functions ---------------------------------------------------------*/
/** @defgroup exc7200_Private_Functions
* @{
*/
/**
* @brief Initialize the exc7200 and configure the needed hardware resources
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void exc7200_Init(uint16_t DeviceAddr)
{
/* Initialize IO BUS layer */
IOE_Init();
}
/**
* @brief Reset the exc7200 by Software.
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void exc7200_Reset(uint16_t DeviceAddr)
{
}
/**
* @brief Read the exc7200 IO Expander device ID.
* @param DeviceAddr: Device address on communication Bus.
* @retval The Device ID (two bytes).
*/
uint16_t exc7200_ReadID(uint16_t DeviceAddr)
{
return 0;
}
/**
* @brief Configures the touch Screen Controller (Single point detection)
* @param DeviceAddr: Device address on communication Bus.
* @retval None.
*/
void exc7200_TS_Start(uint16_t DeviceAddr)
{
}
/**
* @brief Return if there is touch detected or not.
* @param DeviceAddr: Device address on communication Bus.
* @retval Touch detected state.
*/
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;
}
/**
* @brief Get the touch screen X and Y positions values
* @param DeviceAddr: Device address on communication Bus.
* @param X: Pointer to X position value
* @param Y: Pointer to Y position value
* @retval None.
*/
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);
}
/**
* @brief Configure the selected source to generate a global interrupt or not
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void exc7200_TS_EnableIT(uint16_t DeviceAddr)
{
}
/**
* @brief Configure the selected source to generate a global interrupt or not
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void exc7200_TS_DisableIT(uint16_t DeviceAddr)
{
}
/**
* @brief Configure the selected source to generate a global interrupt or not
* @param DeviceAddr: Device address on communication Bus.
* @retval TS interrupts status
*/
uint8_t exc7200_TS_ITStatus(uint16_t DeviceAddr)
{
return 0;
}
/**
* @brief Configure the selected source to generate a global interrupt or not
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void exc7200_TS_ClearIT(uint16_t DeviceAddr)
{
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/