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/**
******************************************************************************
* @file stm32f429i_discovery_ts.c
* @author MCD Application Team
* @brief This file provides a set of functions needed to manage Touch
* screen available with STMPE811 IO Expander device mounted on
* STM32F429I-Discovery Kit.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f429i_discovery_ts.h"
#include "stm32f429i_discovery_io.h"
/** @addtogroup BSP
* @{
*/
/** @addtogroup STM32F429I_DISCOVERY
* @{
*/
/** @defgroup STM32F429I_DISCOVERY_TS STM32F429I DISCOVERY TS
* @{
*/
/** @defgroup STM32F429I_DISCOVERY_TS_Private_Types_Definitions STM32F429I DISCOVERY TS Private Types Definitions
* @{
*/
/**
* @}
*/
/** @defgroup STM32F429I_DISCOVERY_TS_Private_Defines STM32F429I DISCOVERY TS Private Defines
* @{
*/
/**
* @}
*/
/** @defgroup STM32F429I_DISCOVERY_TS_Private_Macros STM32F429I DISCOVERY TS Private Macros
* @{
*/
/**
* @}
*/
/** @defgroup STM32F429I_DISCOVERY_TS_Private_Variables STM32F429I DISCOVERY TS Private Variables
* @{
*/
static TS_DrvTypeDef *TsDrv;
static uint16_t TsXBoundary, TsYBoundary;
/**
* @}
*/
/** @defgroup STM32F429I_DISCOVERY_TS_Private_Function_Prototypes STM32F429I DISCOVERY TS Private Function Prototypes
* @{
*/
/**
* @}
*/
/** @defgroup STM32F429I_DISCOVERY_TS_Private_Functions STM32F429I DISCOVERY TS Private Functions
* @{
*/
/**
* @brief Initializes and configures the touch screen functionalities and
* configures all necessary hardware resources (GPIOs, clocks..).
* @param XSize: The maximum X size of the TS area on LCD
* @param YSize: The maximum Y size of the TS area on LCD
* @retval TS_OK: if all initializations are OK. Other value if error.
*/
uint8_t BSP_TS_Init(uint16_t XSize, uint16_t YSize)
{
uint8_t ret = TS_ERROR;
/* Initialize x and y positions boundaries */
TsXBoundary = XSize;
TsYBoundary = YSize;
/* Read ID and verify if the IO expander is ready */
if (stmpe811_ts_drv.ReadID(TS_I2C_ADDRESS) == STMPE811_ID)
{
/* Initialize the TS driver structure */
TsDrv = &stmpe811_ts_drv;
ret = TS_OK;
}
if (ret == TS_OK)
{
/* Initialize the LL TS Driver */
TsDrv->Init(TS_I2C_ADDRESS);
TsDrv->Start(TS_I2C_ADDRESS);
}
return ret;
}
/**
* @brief Configures and enables the touch screen interrupts.
* @retval TS_OK: if ITconfig is OK. Other value if error.
*/
uint8_t BSP_TS_ITConfig(void)
{
/* Enable the TS ITs */
TsDrv->EnableIT(TS_I2C_ADDRESS);
return TS_OK;
}
/**
* @brief Gets the TS IT status.
* @retval Interrupt status.
*/
uint8_t BSP_TS_ITGetStatus(void)
{
/* Return the TS IT status */
return (TsDrv->GetITStatus(TS_I2C_ADDRESS));
}
/**
* @brief Returns status and positions of the touch screen.
* @param TsState: Pointer to touch screen current state structure
*/
void BSP_TS_GetState(TS_StateTypeDef *TsState)
{
static uint32_t _x = 0, _y = 0;
uint16_t xDiff, yDiff, x, y, xr, yr;
TsState->TouchDetected = TsDrv->DetectTouch(TS_I2C_ADDRESS);
if (TsState->TouchDetected)
{
TsDrv->GetXY(TS_I2C_ADDRESS, &x, &y);
#if defined (USE_STM32F429I_DISCOVERY_REVD)
if (y > 3700)
{
y = 3700;
}
else if (y < 180)
{
y = 180;
}
/* Y value first correction */
y = 3700 - y;
#else
/* Y value first correction */
y -= 360;
#endif
/* Y value second correction */
yr = y / 11;
/* Return y position value */
if (yr <= 0)
{
yr = 0;
}
else if (yr > TsYBoundary)
{
yr = TsYBoundary - 1;
}
else
{}
y = yr;
/* X value first correction */
if (x <= 3000)
{
x = 3870 - x;
}
else
{
x = 3800 - x;
}
/* X value second correction */
xr = x / 15;
/* Return X position value */
if (xr <= 0)
{
xr = 0;
}
else if (xr > TsXBoundary)
{
xr = TsXBoundary - 1;
}
else
{}
x = xr;
xDiff = x > _x ? (x - _x): (_x - x);
yDiff = y > _y ? (y - _y) : (_y - y);
if (xDiff + yDiff > 5)
{
_x = x;
_y = y;
}
/* Update the X position */
TsState->X = _x;
/* Update the Y position */
TsState->Y = _y;
}
}
/**
* @brief Clears all touch screen interrupts.
*/
void BSP_TS_ITClear(void)
{
/* Clear TS IT pending bits */
TsDrv->ClearIT(TS_I2C_ADDRESS);
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/