Diff: stm32746g_discovery_ts.c

Revision:

0:c9112f0c67e3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/stm32746g_discovery_ts.c	Mon Sep 28 13:34:16 2015 +0000
@@ -0,0 +1,447 @@
+/**
+  ******************************************************************************
+  * @file    stm32746g_discovery_ts.c
+  * @author  MCD Application Team
+  * @version V1.0.0
+  * @date    25-June-2015
+  * @brief   This file provides a set of functions needed to manage the Touch 
+  *          Screen on STM32746G-Discovery board.
+  @verbatim
+   1. How To use this driver:
+   --------------------------
+      - This driver is used to drive the touch screen module of the STM32746G-Discovery
+        board on the RK043FN48H-CT672B 480x272 LCD screen with capacitive touch screen.
+      - The FT5336 component driver must be included in project files according to
+        the touch screen driver present on this board.
+   
+   2. Driver description:
+   ---------------------
+     + Initialization steps:
+        o Initialize the TS module using the BSP_TS_Init() function. This 
+          function includes the MSP layer hardware resources initialization and the
+          communication layer configuration to start the TS use. The LCD size properties
+          (x and y) are passed as parameters.
+        o If TS interrupt mode is desired, you must configure the TS interrupt mode
+          by calling the function BSP_TS_ITConfig(). The TS interrupt mode is generated
+          as an external interrupt whenever a touch is detected. 
+          The interrupt mode internally uses the IO functionalities driver driven by
+          the IO expander, to configure the IT line.
+     
+     + Touch screen use
+        o The touch screen state is captured whenever the function BSP_TS_GetState() is 
+          used. This function returns information about the last LCD touch occurred
+          in the TS_StateTypeDef structure.
+        o If TS interrupt mode is used, the function BSP_TS_ITGetStatus() is needed to get
+          the interrupt status. To clear the IT pending bits, you should call the 
+          function BSP_TS_ITClear().
+        o The IT is handled using the corresponding external interrupt IRQ handler,
+          the user IT callback treatment is implemented on the same external interrupt
+          callback.
+  @endverbatim
+  ******************************************************************************
+  * @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 "stm32746g_discovery_ts.h"
+
+/** @addtogroup BSP
+  * @{
+  */
+
+/** @addtogroup STM32746G_DISCOVERY
+  * @{
+  */ 
+  
+/** @defgroup STM32746G_DISCOVERY_TS STM32746G_DISCOVERY_TS
+  * @{
+  */   
+
+/** @defgroup STM32746G_DISCOVERY_TS_Private_Types_Definitions STM32746G_DISCOVERY_TS Types Definitions
+  * @{
+  */ 
+/**
+  * @}
+  */ 
+
+/** @defgroup STM32746G_DISCOVERY_TS_Private_Defines STM32746G_DISCOVERY_TS Types Defines
+  * @{
+  */ 
+/**
+  * @}
+  */ 
+
+/** @defgroup STM32746G_DISCOVERY_TS_Private_Macros STM32746G_DISCOVERY_TS Private Macros
+  * @{
+  */ 
+/**
+  * @}
+  */
+
+/** @defgroup STM32746G_DISCOVERY_TS_Imported_Variables STM32746G_DISCOVERY_TS Imported Variables
+  * @{
+  */
+  /**
+    * @}
+    */
+
+/** @defgroup STM32746G_DISCOVERY_TS_Private_Variables STM32746G_DISCOVERY_TS Private Variables
+  * @{
+  */ 
+static TS_DrvTypeDef *tsDriver;
+static uint16_t tsXBoundary, tsYBoundary; 
+static uint8_t  tsOrientation;
+static uint8_t  I2cAddress;
+/**
+  * @}
+  */ 
+
+/** @defgroup STM32746G_DISCOVERY_TS_Private_Function_Prototypes STM32746G_DISCOVERY_TS Private Function Prototypes
+  * @{
+  */ 
+/**
+  * @}
+  */ 
+
+/** @defgroup STM32746G_DISCOVERY_TS_Exported_Functions STM32746G_DISCOVERY_TS Exported Functions
+  * @{
+  */ 
+
+/**
+  * @brief  Initializes and configures the touch screen functionalities and 
+  *         configures all necessary hardware resources (GPIOs, I2C, clocks..).
+  * @param  ts_SizeX: Maximum X size of the TS area on LCD
+  * @param  ts_SizeY: 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 ts_SizeX, uint16_t ts_SizeY)
+{
+  uint8_t status = TS_OK;
+  tsXBoundary = ts_SizeX;
+  tsYBoundary = ts_SizeY;
+  
+  /* Read ID and verify if the touch screen driver is ready */
+  ft5336_ts_drv.Init(TS_I2C_ADDRESS);
+  if(ft5336_ts_drv.ReadID(TS_I2C_ADDRESS) == FT5336_ID_VALUE)
+  { 
+    /* Initialize the TS driver structure */
+    tsDriver = &ft5336_ts_drv;
+    I2cAddress = TS_I2C_ADDRESS;
+    tsOrientation = TS_SWAP_XY;
+
+    /* Initialize the TS driver */
+    tsDriver->Start(I2cAddress);
+  }
+  else
+  {
+    status = TS_DEVICE_NOT_FOUND;
+  }
+
+  return status;
+}
+
+/**
+  * @brief  DeInitializes the TouchScreen.
+  * @retval TS state
+  */
+uint8_t BSP_TS_DeInit(void)
+{ 
+  /* Actually ts_driver does not provide a DeInit function */
+  return TS_OK;
+}
+
+/**
+  * @brief  Configures and enables the touch screen interrupts.
+  * @retval TS_OK if all initializations are OK. Other value if error.
+  */
+uint8_t BSP_TS_ITConfig(void)
+{
+  GPIO_InitTypeDef gpio_init_structure;
+
+  /* Configure Interrupt mode for SD detection pin */
+  gpio_init_structure.Pin = TS_INT_PIN;
+  gpio_init_structure.Pull = GPIO_NOPULL;
+  gpio_init_structure.Speed = GPIO_SPEED_FAST;
+  gpio_init_structure.Mode = GPIO_MODE_IT_RISING;
+  HAL_GPIO_Init(TS_INT_GPIO_PORT, &gpio_init_structure);
+
+  /* Enable and set Touch screen EXTI Interrupt to the lowest priority */
+  HAL_NVIC_SetPriority((IRQn_Type)(TS_INT_EXTI_IRQn), 0x0F, 0x00);
+  HAL_NVIC_EnableIRQ((IRQn_Type)(TS_INT_EXTI_IRQn));
+
+  /* Enable the TS ITs */
+  tsDriver->EnableIT(I2cAddress);
+
+  return TS_OK;  
+}
+
+/**
+  * @brief  Gets the touch screen interrupt status.
+  * @retval TS_OK if all initializations are OK. Other value if error.
+  */
+uint8_t BSP_TS_ITGetStatus(void)
+{
+  /* Return the TS IT status */
+  return (tsDriver->GetITStatus(I2cAddress));
+}
+
+/**
+  * @brief  Returns status and positions of the touch screen.
+  * @param  TS_State: Pointer to touch screen current state structure
+  * @retval TS_OK if all initializations are OK. Other value if error.
+  */
+uint8_t BSP_TS_GetState(TS_StateTypeDef *TS_State)
+{
+  static uint32_t _x[TS_MAX_NB_TOUCH] = {0, 0};
+  static uint32_t _y[TS_MAX_NB_TOUCH] = {0, 0};
+  uint8_t ts_status = TS_OK;
+  uint16_t x[TS_MAX_NB_TOUCH];
+  uint16_t y[TS_MAX_NB_TOUCH];
+  uint16_t brute_x[TS_MAX_NB_TOUCH];
+  uint16_t brute_y[TS_MAX_NB_TOUCH];
+  uint16_t x_diff;
+  uint16_t y_diff;
+  uint32_t index;
+#if (TS_MULTI_TOUCH_SUPPORTED == 1)
+  uint32_t weight = 0;
+  uint32_t area = 0;
+  uint32_t event = 0;
+#endif /* TS_MULTI_TOUCH_SUPPORTED == 1 */
+
+  /* Check and update the number of touches active detected */
+  TS_State->touchDetected = tsDriver->DetectTouch(I2cAddress);
+  
+  if(TS_State->touchDetected)
+  {
+    for(index=0; index < TS_State->touchDetected; index++)
+    {
+      /* Get each touch coordinates */
+      tsDriver->GetXY(I2cAddress, &(brute_x[index]), &(brute_y[index]));
+
+      if(tsOrientation == TS_SWAP_NONE)
+      {
+        x[index] = brute_x[index];
+        y[index] = brute_y[index];
+      }
+
+      if(tsOrientation & TS_SWAP_X)
+      {
+        x[index] = 4096 - brute_x[index];
+      }
+
+      if(tsOrientation & TS_SWAP_Y)
+      {
+        y[index] = 4096 - brute_y[index];
+      }
+
+      if(tsOrientation & TS_SWAP_XY)
+      {
+        y[index] = brute_x[index];
+        x[index] = brute_y[index];
+      }
+
+      x_diff = x[index] > _x[index]? (x[index] - _x[index]): (_x[index] - x[index]);
+      y_diff = y[index] > _y[index]? (y[index] - _y[index]): (_y[index] - y[index]);
+
+      if ((x_diff + y_diff) > 5)
+      {
+        _x[index] = x[index];
+        _y[index] = y[index];
+      }
+
+      if(I2cAddress == FT5336_I2C_SLAVE_ADDRESS)
+      {
+        TS_State->touchX[index] = x[index];
+        TS_State->touchY[index] = y[index];
+      }
+      else
+      {
+        /* 2^12 = 4096 : indexes are expressed on a dynamic of 4096 */
+        TS_State->touchX[index] = (tsXBoundary * _x[index]) >> 12;
+        TS_State->touchY[index] = (tsYBoundary * _y[index]) >> 12;
+      }
+
+#if (TS_MULTI_TOUCH_SUPPORTED == 1)
+
+      /* Get touch info related to the current touch */
+      ft5336_TS_GetTouchInfo(I2cAddress, index, &weight, &area, &event);
+
+      /* Update TS_State structure */
+      TS_State->touchWeight[index] = weight;
+      TS_State->touchArea[index]   = area;
+
+      /* Remap touch event */
+      switch(event)
+      {
+        case FT5336_TOUCH_EVT_FLAG_PRESS_DOWN	:
+          TS_State->touchEventId[index] = TOUCH_EVENT_PRESS_DOWN;
+          break;
+        case FT5336_TOUCH_EVT_FLAG_LIFT_UP :
+          TS_State->touchEventId[index] = TOUCH_EVENT_LIFT_UP;
+          break;
+        case FT5336_TOUCH_EVT_FLAG_CONTACT :
+          TS_State->touchEventId[index] = TOUCH_EVENT_CONTACT;
+          break;
+        case FT5336_TOUCH_EVT_FLAG_NO_EVENT :
+          TS_State->touchEventId[index] = TOUCH_EVENT_NO_EVT;
+          break;
+        default :
+          ts_status = TS_ERROR;
+          break;
+      } /* of switch(event) */
+
+#endif /* TS_MULTI_TOUCH_SUPPORTED == 1 */
+
+    } /* of for(index=0; index < TS_State->touchDetected; index++) */
+
+#if (TS_MULTI_TOUCH_SUPPORTED == 1)
+    /* Get gesture Id */
+    ts_status = BSP_TS_Get_GestureId(TS_State);
+#endif /* TS_MULTI_TOUCH_SUPPORTED == 1 */
+
+  } /* end of if(TS_State->touchDetected != 0) */
+
+  return (ts_status);
+}
+
+#if (TS_MULTI_TOUCH_SUPPORTED == 1)
+/**
+  * @brief  Update gesture Id following a touch detected.
+  * @param  TS_State: Pointer to touch screen current state structure
+  * @retval TS_OK if all initializations are OK. Other value if error.
+  */
+uint8_t BSP_TS_Get_GestureId(TS_StateTypeDef *TS_State)
+{
+  uint32_t gestureId = 0;
+  uint8_t  ts_status = TS_OK;
+
+  /* Get gesture Id */
+  ft5336_TS_GetGestureID(I2cAddress, &gestureId);
+
+  /* Remap gesture Id to a TS_GestureIdTypeDef value */
+  switch(gestureId)
+  {
+    case FT5336_GEST_ID_NO_GESTURE :
+      TS_State->gestureId = GEST_ID_NO_GESTURE;
+      break;
+    case FT5336_GEST_ID_MOVE_UP :
+      TS_State->gestureId = GEST_ID_MOVE_UP;
+      break;
+    case FT5336_GEST_ID_MOVE_RIGHT :
+      TS_State->gestureId = GEST_ID_MOVE_RIGHT;
+      break;
+    case FT5336_GEST_ID_MOVE_DOWN :
+      TS_State->gestureId = GEST_ID_MOVE_DOWN;
+      break;
+    case FT5336_GEST_ID_MOVE_LEFT :
+      TS_State->gestureId = GEST_ID_MOVE_LEFT;
+      break;
+    case FT5336_GEST_ID_ZOOM_IN :
+      TS_State->gestureId = GEST_ID_ZOOM_IN;
+      break;
+    case FT5336_GEST_ID_ZOOM_OUT :
+      TS_State->gestureId = GEST_ID_ZOOM_OUT;
+      break;
+    default :
+      ts_status = TS_ERROR;
+      break;
+  } /* of switch(gestureId) */
+
+  return(ts_status);
+}
+#endif /* TS_MULTI_TOUCH_SUPPORTED == 1 */
+
+/**
+  * @brief  Clears all touch screen interrupts.
+  */
+void BSP_TS_ITClear(void)
+{
+  /* Clear TS IT pending bits */
+  tsDriver->ClearIT(I2cAddress); 
+}
+
+
+/** @defgroup STM32756G_DISCOVERY_TS_Private_Functions TS Private Functions
+  * @{
+  */
+
+
+/**
+  * @brief  Function used to reset all touch data before a new acquisition
+  *         of touch information.
+  * @param  TS_State: Pointer to touch screen current state structure
+  * @retval TS_OK if OK, TE_ERROR if problem found.
+  */
+uint8_t BSP_TS_ResetTouchData(TS_StateTypeDef *TS_State)
+{
+  uint8_t ts_status = TS_ERROR;
+  uint32_t index;
+
+  if (TS_State != (TS_StateTypeDef *)NULL)
+  {
+    TS_State->gestureId = GEST_ID_NO_GESTURE;
+    TS_State->touchDetected = 0;
+
+    for(index = 0; index < TS_MAX_NB_TOUCH; index++)
+    {
+      TS_State->touchX[index]       = 0;
+      TS_State->touchY[index]       = 0;
+      TS_State->touchArea[index]    = 0;
+      TS_State->touchEventId[index] = TOUCH_EVENT_NO_EVT;
+      TS_State->touchWeight[index]  = 0;
+    }
+
+    ts_status = TS_OK;
+
+  } /* of if (TS_State != (TS_StateTypeDef *)NULL) */
+
+  return (ts_status);
+}
+
+/**
+  * @}
+  */ 
+
+/**
+  * @}
+  */ 
+
+/**
+  * @}
+  */ 
+
+/**
+  * @}
+  */  
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/