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623 lines
19 KiB
623 lines
19 KiB
/** |
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****************************************************************************** |
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* @file ft5336.c |
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* @author MCD Application Team |
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* @brief This file provides a set of functions needed to manage the FT5336 |
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* touch screen devices. |
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****************************************************************************** |
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* @attention |
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* |
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* <h2><center>© COPYRIGHT(c) 2015 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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/* Includes ------------------------------------------------------------------*/ |
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#include "ft5336.h" |
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/** @addtogroup BSP |
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* @{ |
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*/ |
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/** @addtogroup Component |
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* @{ |
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*/ |
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/** @defgroup FT5336 |
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* @{ |
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*/ |
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/* Private typedef -----------------------------------------------------------*/ |
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/** @defgroup FT5336_Private_Types_Definitions |
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* @{ |
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*/ |
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/* Private define ------------------------------------------------------------*/ |
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/** @defgroup FT5336_Private_Defines |
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* @{ |
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*/ |
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/* Private macro -------------------------------------------------------------*/ |
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/** @defgroup FT5336_Private_Macros |
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* @{ |
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*/ |
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/* Private variables ---------------------------------------------------------*/ |
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/** @defgroup FT5336_Private_Variables |
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* @{ |
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*/ |
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/* Touch screen driver structure initialization */ |
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TS_DrvTypeDef ft5336_ts_drv = |
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{ |
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ft5336_Init, |
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ft5336_ReadID, |
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ft5336_Reset, |
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ft5336_TS_Start, |
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ft5336_TS_DetectTouch, |
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ft5336_TS_GetXY, |
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ft5336_TS_EnableIT, |
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ft5336_TS_ClearIT, |
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ft5336_TS_ITStatus, |
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ft5336_TS_DisableIT |
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}; |
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/* Global ft5336 handle */ |
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static ft5336_handle_TypeDef ft5336_handle = { FT5336_I2C_NOT_INITIALIZED, 0, 0}; |
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/** |
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* @} |
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*/ |
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/** @defgroup ft5336_Private_Function_Prototypes |
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* @{ |
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*/ |
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/* Private functions prototypes-----------------------------------------------*/ |
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/** |
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* @brief Return the status of I2C was initialized or not. |
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* @param None. |
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* @retval : I2C initialization status. |
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*/ |
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static uint8_t ft5336_Get_I2C_InitializedStatus(void); |
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/** |
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* @brief I2C initialize if needed. |
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* @param None. |
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* @retval : None. |
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*/ |
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static void ft5336_I2C_InitializeIfRequired(void); |
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/** |
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* @brief Basic static configuration of TouchScreen |
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* @param DeviceAddr: FT5336 Device address for communication on I2C Bus. |
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* @retval Status FT5336_STATUS_OK or FT5336_STATUS_NOT_OK. |
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*/ |
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static uint32_t ft5336_TS_Configure(uint16_t DeviceAddr); |
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/** @defgroup ft5336_Private_Functions |
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* @{ |
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*/ |
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/** @defgroup ft5336_Public_Function_Body |
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* @{ |
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*/ |
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/* Public functions bodies-----------------------------------------------*/ |
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/** |
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* @brief Initialize the ft5336 communication bus |
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* from MCU to FT5336 : ie I2C channel initialization (if required). |
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* @param DeviceAddr: Device address on communication Bus (I2C slave address of FT5336). |
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* @retval None |
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*/ |
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void ft5336_Init(uint16_t DeviceAddr) |
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{ |
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/* Wait at least 200ms after power up before accessing registers |
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* Trsi timing (Time of starting to report point after resetting) from FT5336GQQ datasheet */ |
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TS_IO_Delay(200); |
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/* Initialize I2C link if needed */ |
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ft5336_I2C_InitializeIfRequired(); |
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} |
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/** |
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* @brief Software Reset the ft5336. |
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* @note : Not applicable to FT5336. |
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* @param DeviceAddr: Device address on communication Bus (I2C slave address of FT5336). |
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* @retval None |
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*/ |
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void ft5336_Reset(uint16_t DeviceAddr) |
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{ |
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/* Do nothing */ |
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/* No software reset sequence available in FT5336 IC */ |
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} |
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/** |
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* @brief Read the ft5336 device ID, pre initialize I2C in case of need to be |
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* able to read the FT5336 device ID, and verify this is a FT5336. |
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* @param DeviceAddr: I2C FT5336 Slave address. |
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* @retval The Device ID (two bytes). |
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*/ |
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uint16_t ft5336_ReadID(uint16_t DeviceAddr) |
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{ |
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volatile uint8_t ucReadId = 0; |
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uint8_t nbReadAttempts = 0; |
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uint8_t bFoundDevice = 0; /* Device not found by default */ |
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/* Initialize I2C link if needed */ |
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ft5336_I2C_InitializeIfRequired(); |
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/* At maximum 4 attempts to read ID : exit at first finding of the searched device ID */ |
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for(nbReadAttempts = 0; ((nbReadAttempts < 3) && !(bFoundDevice)); nbReadAttempts++) |
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{ |
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/* Read register FT5336_CHIP_ID_REG as DeviceID detection */ |
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ucReadId = TS_IO_Read(DeviceAddr, FT5336_CHIP_ID_REG); |
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/* Found the searched device ID ? */ |
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if(ucReadId == FT5336_ID_VALUE) |
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{ |
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/* Set device as found */ |
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bFoundDevice = 1; |
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} |
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} |
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/* Return the device ID value */ |
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return (ucReadId); |
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} |
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/** |
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* @brief Configures the touch Screen IC device to start detecting touches |
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* @param DeviceAddr: Device address on communication Bus (I2C slave address). |
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* @retval None. |
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*/ |
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void ft5336_TS_Start(uint16_t DeviceAddr) |
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{ |
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/* Minimum static configuration of FT5336 */ |
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FT5336_ASSERT(ft5336_TS_Configure(DeviceAddr)); |
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/* By default set FT5336 IC in Polling mode : no INT generation on FT5336 for new touch available */ |
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/* Note TS_INT is active low */ |
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ft5336_TS_DisableIT(DeviceAddr); |
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} |
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/** |
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* @brief Return if there is touches detected or not. |
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* Try to detect new touches and forget the old ones (reset internal global |
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* variables). |
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* @param DeviceAddr: Device address on communication Bus. |
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* @retval : Number of active touches detected (can be 0, 1 or 2). |
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*/ |
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uint8_t ft5336_TS_DetectTouch(uint16_t DeviceAddr) |
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{ |
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volatile uint8_t nbTouch = 0; |
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/* Read register FT5336_TD_STAT_REG to check number of touches detection */ |
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nbTouch = TS_IO_Read(DeviceAddr, FT5336_TD_STAT_REG); |
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nbTouch &= FT5336_TD_STAT_MASK; |
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if(nbTouch > FT5336_MAX_DETECTABLE_TOUCH) |
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{ |
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/* If invalid number of touch detected, set it to zero */ |
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nbTouch = 0; |
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} |
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/* Update ft5336 driver internal global : current number of active touches */ |
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ft5336_handle.currActiveTouchNb = nbTouch; |
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/* Reset current active touch index on which to work on */ |
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ft5336_handle.currActiveTouchIdx = 0; |
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return(nbTouch); |
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} |
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/** |
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* @brief Get the touch screen X and Y positions values |
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* Manage multi touch thanks to touch Index global |
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* variable 'ft5336_handle.currActiveTouchIdx'. |
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* @param DeviceAddr: Device address on communication Bus. |
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* @param X: Pointer to X position value |
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* @param Y: Pointer to Y position value |
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* @retval None. |
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*/ |
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void ft5336_TS_GetXY(uint16_t DeviceAddr, uint16_t *X, uint16_t *Y) |
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{ |
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volatile uint8_t ucReadData = 0; |
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static uint16_t coord; |
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uint8_t regAddressXLow = 0; |
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uint8_t regAddressXHigh = 0; |
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uint8_t regAddressYLow = 0; |
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uint8_t regAddressYHigh = 0; |
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if(ft5336_handle.currActiveTouchIdx < ft5336_handle.currActiveTouchNb) |
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{ |
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switch(ft5336_handle.currActiveTouchIdx) |
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{ |
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case 0 : |
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regAddressXLow = FT5336_P1_XL_REG; |
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regAddressXHigh = FT5336_P1_XH_REG; |
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regAddressYLow = FT5336_P1_YL_REG; |
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regAddressYHigh = FT5336_P1_YH_REG; |
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break; |
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case 1 : |
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regAddressXLow = FT5336_P2_XL_REG; |
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regAddressXHigh = FT5336_P2_XH_REG; |
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regAddressYLow = FT5336_P2_YL_REG; |
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regAddressYHigh = FT5336_P2_YH_REG; |
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break; |
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case 2 : |
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regAddressXLow = FT5336_P3_XL_REG; |
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regAddressXHigh = FT5336_P3_XH_REG; |
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regAddressYLow = FT5336_P3_YL_REG; |
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regAddressYHigh = FT5336_P3_YH_REG; |
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break; |
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case 3 : |
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regAddressXLow = FT5336_P4_XL_REG; |
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regAddressXHigh = FT5336_P4_XH_REG; |
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regAddressYLow = FT5336_P4_YL_REG; |
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regAddressYHigh = FT5336_P4_YH_REG; |
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break; |
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case 4 : |
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regAddressXLow = FT5336_P5_XL_REG; |
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regAddressXHigh = FT5336_P5_XH_REG; |
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regAddressYLow = FT5336_P5_YL_REG; |
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regAddressYHigh = FT5336_P5_YH_REG; |
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break; |
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case 5 : |
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regAddressXLow = FT5336_P6_XL_REG; |
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regAddressXHigh = FT5336_P6_XH_REG; |
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regAddressYLow = FT5336_P6_YL_REG; |
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regAddressYHigh = FT5336_P6_YH_REG; |
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break; |
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case 6 : |
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regAddressXLow = FT5336_P7_XL_REG; |
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regAddressXHigh = FT5336_P7_XH_REG; |
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regAddressYLow = FT5336_P7_YL_REG; |
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regAddressYHigh = FT5336_P7_YH_REG; |
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break; |
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case 7 : |
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regAddressXLow = FT5336_P8_XL_REG; |
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regAddressXHigh = FT5336_P8_XH_REG; |
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regAddressYLow = FT5336_P8_YL_REG; |
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regAddressYHigh = FT5336_P8_YH_REG; |
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break; |
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case 8 : |
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regAddressXLow = FT5336_P9_XL_REG; |
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regAddressXHigh = FT5336_P9_XH_REG; |
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regAddressYLow = FT5336_P9_YL_REG; |
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regAddressYHigh = FT5336_P9_YH_REG; |
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break; |
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case 9 : |
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regAddressXLow = FT5336_P10_XL_REG; |
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regAddressXHigh = FT5336_P10_XH_REG; |
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regAddressYLow = FT5336_P10_YL_REG; |
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regAddressYHigh = FT5336_P10_YH_REG; |
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break; |
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default : |
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break; |
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} /* end switch(ft5336_handle.currActiveTouchIdx) */ |
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/* Read low part of X position */ |
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ucReadData = TS_IO_Read(DeviceAddr, regAddressXLow); |
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coord = (ucReadData & FT5336_TOUCH_POS_LSB_MASK) >> FT5336_TOUCH_POS_LSB_SHIFT; |
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/* Read high part of X position */ |
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ucReadData = TS_IO_Read(DeviceAddr, regAddressXHigh); |
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coord |= ((ucReadData & FT5336_TOUCH_POS_MSB_MASK) >> FT5336_TOUCH_POS_MSB_SHIFT) << 8; |
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/* Send back ready X position to caller */ |
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*X = coord; |
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/* Read low part of Y position */ |
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ucReadData = TS_IO_Read(DeviceAddr, regAddressYLow); |
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coord = (ucReadData & FT5336_TOUCH_POS_LSB_MASK) >> FT5336_TOUCH_POS_LSB_SHIFT; |
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/* Read high part of Y position */ |
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ucReadData = TS_IO_Read(DeviceAddr, regAddressYHigh); |
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coord |= ((ucReadData & FT5336_TOUCH_POS_MSB_MASK) >> FT5336_TOUCH_POS_MSB_SHIFT) << 8; |
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/* Send back ready Y position to caller */ |
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*Y = coord; |
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ft5336_handle.currActiveTouchIdx++; /* next call will work on next touch */ |
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} /* of if(ft5336_handle.currActiveTouchIdx < ft5336_handle.currActiveTouchNb) */ |
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} |
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/** |
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* @brief Configure the FT5336 device to generate IT on given INT pin |
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* connected to MCU as EXTI. |
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* @param DeviceAddr: Device address on communication Bus (Slave I2C address of FT5336). |
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* @retval None |
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*/ |
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void ft5336_TS_EnableIT(uint16_t DeviceAddr) |
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{ |
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uint8_t regValue = 0; |
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regValue = (FT5336_G_MODE_INTERRUPT_TRIGGER & (FT5336_G_MODE_INTERRUPT_MASK >> FT5336_G_MODE_INTERRUPT_SHIFT)) << FT5336_G_MODE_INTERRUPT_SHIFT; |
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/* Set interrupt trigger mode in FT5336_GMODE_REG */ |
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TS_IO_Write(DeviceAddr, FT5336_GMODE_REG, regValue); |
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} |
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/** |
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* @brief Configure the FT5336 device to stop generating IT on the given INT pin |
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* connected to MCU as EXTI. |
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* @param DeviceAddr: Device address on communication Bus (Slave I2C address of FT5336). |
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* @retval None |
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*/ |
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void ft5336_TS_DisableIT(uint16_t DeviceAddr) |
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{ |
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uint8_t regValue = 0; |
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regValue = (FT5336_G_MODE_INTERRUPT_POLLING & (FT5336_G_MODE_INTERRUPT_MASK >> FT5336_G_MODE_INTERRUPT_SHIFT)) << FT5336_G_MODE_INTERRUPT_SHIFT; |
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|
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/* Set interrupt polling mode in FT5336_GMODE_REG */ |
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TS_IO_Write(DeviceAddr, FT5336_GMODE_REG, regValue); |
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} |
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|
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/** |
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* @brief Get IT status from FT5336 interrupt status registers |
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* Should be called Following an EXTI coming to the MCU to know the detailed |
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* reason of the interrupt. |
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* @note : This feature is not applicable to FT5336. |
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* @param DeviceAddr: Device address on communication Bus (I2C slave address of FT5336). |
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* @retval TS interrupts status : always return 0 here |
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*/ |
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uint8_t ft5336_TS_ITStatus(uint16_t DeviceAddr) |
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{ |
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/* Always return 0 as feature not applicable to FT5336 */ |
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return 0; |
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} |
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/** |
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* @brief Clear IT status in FT5336 interrupt status clear registers |
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* Should be called Following an EXTI coming to the MCU. |
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* @note : This feature is not applicable to FT5336. |
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* @param DeviceAddr: Device address on communication Bus (I2C slave address of FT5336). |
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* @retval None |
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*/ |
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void ft5336_TS_ClearIT(uint16_t DeviceAddr) |
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{ |
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/* Nothing to be done here for FT5336 */ |
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} |
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/**** NEW FEATURES enabled when Multi-touch support is enabled ****/ |
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#if (TS_MULTI_TOUCH_SUPPORTED == 1) |
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|
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/** |
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* @brief Get the last touch gesture identification (zoom, move up/down...). |
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* @param DeviceAddr: Device address on communication Bus (I2C slave address of FT5336). |
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* @param pGestureId : Pointer to get last touch gesture Identification. |
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* @retval None. |
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*/ |
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void ft5336_TS_GetGestureID(uint16_t DeviceAddr, uint32_t * pGestureId) |
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{ |
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volatile uint8_t ucReadData = 0; |
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|
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ucReadData = TS_IO_Read(DeviceAddr, FT5336_GEST_ID_REG); |
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|
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* pGestureId = ucReadData; |
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} |
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|
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/** |
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* @brief Get the touch detailed informations on touch number 'touchIdx' (0..1) |
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* This touch detailed information contains : |
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* - weight that was applied to this touch |
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* - sub-area of the touch in the touch panel |
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* - event of linked to the touch (press down, lift up, ...) |
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* @param DeviceAddr: Device address on communication Bus (I2C slave address of FT5336). |
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* @param touchIdx : Passed index of the touch (0..1) on which we want to get the |
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* detailed information. |
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* @param pWeight : Pointer to to get the weight information of 'touchIdx'. |
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* @param pArea : Pointer to to get the sub-area information of 'touchIdx'. |
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* @param pEvent : Pointer to to get the event information of 'touchIdx'. |
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|
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* @retval None. |
|
*/ |
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void ft5336_TS_GetTouchInfo(uint16_t DeviceAddr, |
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uint32_t touchIdx, |
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uint32_t * pWeight, |
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uint32_t * pArea, |
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uint32_t * pEvent) |
|
{ |
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volatile uint8_t ucReadData = 0; |
|
uint8_t regAddressXHigh = 0; |
|
uint8_t regAddressPWeight = 0; |
|
uint8_t regAddressPMisc = 0; |
|
|
|
if(touchIdx < ft5336_handle.currActiveTouchNb) |
|
{ |
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switch(touchIdx) |
|
{ |
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case 0 : |
|
regAddressXHigh = FT5336_P1_XH_REG; |
|
regAddressPWeight = FT5336_P1_WEIGHT_REG; |
|
regAddressPMisc = FT5336_P1_MISC_REG; |
|
break; |
|
|
|
case 1 : |
|
regAddressXHigh = FT5336_P2_XH_REG; |
|
regAddressPWeight = FT5336_P2_WEIGHT_REG; |
|
regAddressPMisc = FT5336_P2_MISC_REG; |
|
break; |
|
|
|
case 2 : |
|
regAddressXHigh = FT5336_P3_XH_REG; |
|
regAddressPWeight = FT5336_P3_WEIGHT_REG; |
|
regAddressPMisc = FT5336_P3_MISC_REG; |
|
break; |
|
|
|
case 3 : |
|
regAddressXHigh = FT5336_P4_XH_REG; |
|
regAddressPWeight = FT5336_P4_WEIGHT_REG; |
|
regAddressPMisc = FT5336_P4_MISC_REG; |
|
break; |
|
|
|
case 4 : |
|
regAddressXHigh = FT5336_P5_XH_REG; |
|
regAddressPWeight = FT5336_P5_WEIGHT_REG; |
|
regAddressPMisc = FT5336_P5_MISC_REG; |
|
break; |
|
|
|
case 5 : |
|
regAddressXHigh = FT5336_P6_XH_REG; |
|
regAddressPWeight = FT5336_P6_WEIGHT_REG; |
|
regAddressPMisc = FT5336_P6_MISC_REG; |
|
break; |
|
|
|
case 6 : |
|
regAddressXHigh = FT5336_P7_XH_REG; |
|
regAddressPWeight = FT5336_P7_WEIGHT_REG; |
|
regAddressPMisc = FT5336_P7_MISC_REG; |
|
break; |
|
|
|
case 7 : |
|
regAddressXHigh = FT5336_P8_XH_REG; |
|
regAddressPWeight = FT5336_P8_WEIGHT_REG; |
|
regAddressPMisc = FT5336_P8_MISC_REG; |
|
break; |
|
|
|
case 8 : |
|
regAddressXHigh = FT5336_P9_XH_REG; |
|
regAddressPWeight = FT5336_P9_WEIGHT_REG; |
|
regAddressPMisc = FT5336_P9_MISC_REG; |
|
break; |
|
|
|
case 9 : |
|
regAddressXHigh = FT5336_P10_XH_REG; |
|
regAddressPWeight = FT5336_P10_WEIGHT_REG; |
|
regAddressPMisc = FT5336_P10_MISC_REG; |
|
break; |
|
|
|
default : |
|
break; |
|
|
|
} /* end switch(touchIdx) */ |
|
|
|
/* Read Event Id of touch index */ |
|
ucReadData = TS_IO_Read(DeviceAddr, regAddressXHigh); |
|
* pEvent = (ucReadData & FT5336_TOUCH_EVT_FLAG_MASK) >> FT5336_TOUCH_EVT_FLAG_SHIFT; |
|
|
|
/* Read weight of touch index */ |
|
ucReadData = TS_IO_Read(DeviceAddr, regAddressPWeight); |
|
* pWeight = (ucReadData & FT5336_TOUCH_WEIGHT_MASK) >> FT5336_TOUCH_WEIGHT_SHIFT; |
|
|
|
/* Read area of touch index */ |
|
ucReadData = TS_IO_Read(DeviceAddr, regAddressPMisc); |
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* pArea = (ucReadData & FT5336_TOUCH_AREA_MASK) >> FT5336_TOUCH_AREA_SHIFT; |
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} /* of if(touchIdx < ft5336_handle.currActiveTouchNb) */ |
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} |
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#endif /* TS_MULTI_TOUCH_SUPPORTED == 1 */ |
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/** @defgroup ft5336_Static_Function_Body |
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* @{ |
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*/ |
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/* Static functions bodies-----------------------------------------------*/ |
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/** |
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* @brief Return the status of I2C was initialized or not. |
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* @param None. |
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* @retval : I2C initialization status. |
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*/ |
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static uint8_t ft5336_Get_I2C_InitializedStatus(void) |
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{ |
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return(ft5336_handle.i2cInitialized); |
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} |
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/** |
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* @brief I2C initialize if needed. |
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* @param None. |
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* @retval : None. |
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*/ |
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static void ft5336_I2C_InitializeIfRequired(void) |
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{ |
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if(ft5336_Get_I2C_InitializedStatus() == FT5336_I2C_NOT_INITIALIZED) |
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{ |
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/* Initialize TS IO BUS layer (I2C) */ |
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TS_IO_Init(); |
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/* Set state to initialized */ |
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ft5336_handle.i2cInitialized = FT5336_I2C_INITIALIZED; |
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} |
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} |
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/** |
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* @brief Basic static configuration of TouchScreen |
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* @param DeviceAddr: FT5336 Device address for communication on I2C Bus. |
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* @retval Status FT5336_STATUS_OK or FT5336_STATUS_NOT_OK. |
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*/ |
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static uint32_t ft5336_TS_Configure(uint16_t DeviceAddr) |
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{ |
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uint32_t status = FT5336_STATUS_OK; |
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/* Nothing special to be done for FT5336 */ |
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return(status); |
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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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/** |
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* @} |
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*/ |
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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