Diff: STM32F429I-Discovery/stm32f429i_discovery_ts.c

Revision:

0:e1d164542663

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/STM32F429I-Discovery/stm32f429i_discovery_ts.c	Thu Dec 17 10:27:15 2015 +0000
@@ -0,0 +1,260 @@
+/**
+  ******************************************************************************
+  * @file    stm32f429i_discovery_ts.c
+  * @author  MCD Application Team
+  * @version V2.1.2
+  * @date    02-March-2015
+  * @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
+  *
+  * <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 "stm32f429i_discovery_ts.h"
+#include "stm32f429i_discovery_io.h"
+
+/** @addtogroup BSP
+  * @{
+  */
+
+/** @addtogroup STM32F429I_DISCOVERY
+  * @{
+  */ 
+  
+/** @defgroup STM32F429I_DISCOVERY_TS
+  * @{
+  */ 
+
+/** @defgroup STM32F429I_DISCOVERY_TS_Private_Types_Definitions
+  * @{
+  */ 
+/**
+  * @}
+  */ 
+
+/** @defgroup STM32F429I_DISCOVERY_TS_Private_Defines
+  * @{
+  */ 
+/**
+  * @}
+  */ 
+
+/** @defgroup STM32F429I_DISCOVERY_TS_Private_Macros
+  * @{
+  */ 
+/**
+  * @}
+  */ 
+
+/** @defgroup STM32F429I_DISCOVERY_TS_Private_Variables
+  * @{
+  */
+static TS_DrvTypeDef     *TsDrv;
+static uint16_t          TsXBoundary, TsYBoundary; 
+/**
+  * @}
+  */
+
+/** @defgroup STM32F429I_DISCOVERY_TS_Private_Function_Prototypes
+  * @{
+  */
+/**
+  * @}
+  */
+
+/** @defgroup 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.
+  * @param  None
+  * @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.
+  * @param  None
+  * @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
+  * @retval None.
+  */
+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);
+    
+    /* Y value first correction */
+    y -= 360;  
+    
+    /* 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.
+  * @param  None
+  * @retval None
+  */  
+void BSP_TS_ITClear(void)
+{
+  /* Clear TS IT pending bits */
+  TsDrv->ClearIT(TS_I2C_ADDRESS); 
+}
+
+/**
+  * @}
+  */ 
+
+/**
+  * @}
+  */ 
+
+/**
+  * @}
+  */ 
+
+/**
+  * @}
+  */ 
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/