237 lines
7.4 KiB
C
237 lines
7.4 KiB
C
/**
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******************************************************************************
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* @file stm3210c_eval_ts.c
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* @author MCD Application Team
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* @version V6.1.0
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* @date 14-April-2017
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* @brief This file provides a set of functions needed to manage the touch
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* screen on STM3210C_EVAL evaluation board.
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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/* File Info : -----------------------------------------------------------------
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User NOTES
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1. How To use this driver:
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--------------------------
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- This driver is used to drive the touch screen module of the STM3210C-EVAL
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evaluation board on the ILI9325 LCD mounted on MB785 daughter board .
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- The STMPE811 IO expander device component driver must be included with this
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driver in order to run the TS module commanded by the IO expander device
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mounted on the evaluation board.
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2. Driver description:
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---------------------
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+ Initialization steps:
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o Initialize the TS module using the BSP_TS_Init() function. This
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function includes the MSP layer hardware resources initialization and the
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communication layer configuration to start the TS use. The LCD size properties
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(x and y) are passed as parameters.
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o If TS interrupt mode is desired, you must configure the TS interrupt mode
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by calling the function BSP_TS_ITConfig(). The TS interrupt mode is generated
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as an external interrupt whenever a touch is detected.
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+ Touch screen use
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o The touch screen state is captured whenever the function BSP_TS_GetState() is
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used. This function returns information about the last LCD touch occurred
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in the TS_StateTypeDef structure.
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o If TS interrupt mode is used, the function BSP_TS_ITGetStatus() is needed to get
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the interrupt status. To clear the IT pending bits, you should call the
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function BSP_TS_ITClear().
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o The IT is handled using the corresponding external interrupt IRQ handler,
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the user IT callback treatment is implemented on the same external interrupt
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callback.
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------------------------------------------------------------------------------*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm3210c_eval_ts.h"
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/** @addtogroup BSP
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* @{
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*/
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/** @addtogroup STM3210C_EVAL
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* @{
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*/
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/** @defgroup STM3210C_EVAL_TS STM3210C EVAL Touch Screen
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* @{
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*/
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/* Private variables ---------------------------------------------------------*/
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/** @defgroup STM3210C_EVAL_TS_Private_Variables STM3210C EVAL TS Private Variables
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* @{
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*/
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static TS_DrvTypeDef *ts_driver;
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static uint16_t ts_x_boundary, ts_y_boundary;
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static uint8_t ts_orientation;
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/**
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* @}
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*/
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/* Private functions ---------------------------------------------------------*/
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/** @defgroup STM3210C_EVAL_TS_Exported_Functions STM3210C EVAL TS Exported Functions
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* @{
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*/
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/**
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* @brief Initializes and configures the touch screen functionalities and
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* configures all necessary hardware resources (GPIOs, clocks..).
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* @param xSize: Maximum X size of the TS area on LCD
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* @param ySize: Maximum Y size of the TS area on LCD
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* @retval TS_OK: if all initializations are OK. Other value if error.
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*/
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uint8_t BSP_TS_Init(uint16_t xSize, uint16_t ySize)
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{
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uint8_t ret = TS_ERROR;
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if(stmpe811_ts_drv.ReadID(TS_I2C_ADDRESS) == STMPE811_ID)
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{
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/* Initialize the TS driver structure */
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ts_driver = &stmpe811_ts_drv;
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/* Initialize x and y positions boundaries */
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ts_x_boundary = xSize;
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ts_y_boundary = ySize;
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ts_orientation = TS_SWAP_XY;
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ret = TS_OK;
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}
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if(ret == TS_OK)
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{
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/* Initialize the LL TS Driver */
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ts_driver->Reset(TS_I2C_ADDRESS);
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ts_driver->Init(TS_I2C_ADDRESS);
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ts_driver->Start(TS_I2C_ADDRESS);
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}
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return ret;
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}
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/**
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* @brief Configures and enables the touch screen interrupts.
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* @retval TS_OK: if all initializations are OK. Other value if error.
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*/
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uint8_t BSP_TS_ITConfig(void)
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{
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/* Call component driver to enable TS ITs */
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ts_driver->EnableIT(TS_I2C_ADDRESS);
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return TS_OK;
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}
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/**
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* @brief Gets the touch screen interrupt status.
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* @retval TS_OK: if all initializations are OK. Other value if error.
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*/
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uint8_t BSP_TS_ITGetStatus(void)
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{
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/* Call component driver to enable TS ITs */
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return (ts_driver->GetITStatus(TS_I2C_ADDRESS));
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}
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/**
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* @brief Returns status and positions of the touch screen.
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* @param TS_State: Pointer to touch screen current state structure
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* @retval TS_OK: if all initializations are OK. Other value if error.
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*/
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uint8_t BSP_TS_GetState(TS_StateTypeDef *TS_State)
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{
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static uint32_t _x = 0, _y = 0;
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uint16_t xDiff, yDiff , x , y;
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uint16_t swap;
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TS_State->TouchDetected = ts_driver->DetectTouch(TS_I2C_ADDRESS);
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if(TS_State->TouchDetected)
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{
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ts_driver->GetXY(TS_I2C_ADDRESS, &x, &y);
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if(ts_orientation & TS_SWAP_X)
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{
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x = 4096 - x;
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}
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if(ts_orientation & TS_SWAP_Y)
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{
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y = 4096 - y;
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}
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if(ts_orientation & TS_SWAP_XY)
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{
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swap = y;
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y = x;
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x = swap;
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}
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xDiff = x > _x? (x - _x): (_x - x);
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yDiff = y > _y? (y - _y): (_y - y);
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if (xDiff + yDiff > 5)
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{
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_x = x;
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_y = y;
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}
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TS_State->x = (ts_x_boundary * _x) >> 12;
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TS_State->y = (ts_y_boundary * _y) >> 12;
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}
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return TS_OK;
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}
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/**
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* @brief Clears all touch screen interrupts.
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*/
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void BSP_TS_ITClear(void)
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{
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ts_driver->ClearIT(TS_I2C_ADDRESS);
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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