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Diff: Components/ft6x06/ft6x06.c
- Revision:
- 0:0002c86c2220
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Components/ft6x06/ft6x06.c Fri Dec 18 07:32:01 2015 +0000
@@ -0,0 +1,516 @@
+/**
+ ******************************************************************************
+ * @file ft6x06.c
+ * @author MCD Application Team
+ * @version V1.0.0
+ * @date 03-August-2015
+ * @brief This file provides a set of functions needed to manage the FT6X06
+ * IO Expander devices.
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© 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 "ft6x06.h"
+
+/** @addtogroup BSP
+ * @{
+ */
+
+/** @addtogroup Component
+ * @{
+ */
+
+/** @defgroup FT6X06
+ * @{
+ */
+
+/* Private typedef -----------------------------------------------------------*/
+
+/** @defgroup FT6X06_Private_Defines FT6X06 Private Defines
+ * @{
+ */
+#define FT6x06_MAX_INSTANCE 2
+/**
+ * @}
+ */
+
+/* Private macro -------------------------------------------------------------*/
+
+/** @defgroup FT6X06_Private_Variables FT6X06 Private Variables
+ * @{
+ */
+
+/* Touch screen driver structure initialization */
+TS_DrvTypeDef ft6x06_ts_drv =
+{
+ ft6x06_Init,
+ ft6x06_ReadID,
+ ft6x06_Reset,
+
+ ft6x06_TS_Start,
+ ft6x06_TS_DetectTouch,
+ ft6x06_TS_GetXY,
+
+ ft6x06_TS_EnableIT,
+ ft6x06_TS_ClearIT,
+ ft6x06_TS_ITStatus,
+ ft6x06_TS_DisableIT
+
+};
+
+/* ft6x06 instances by address */
+uint8_t ft6x06[FT6x06_MAX_INSTANCE] = {0};
+
+/* Global ft6x06 handle */
+static ft6x06_handle_TypeDef ft6x06_handle = { FT6206_I2C_NOT_INITIALIZED, 0, 0};
+
+/**
+ * @}
+ */
+
+/** @defgroup ft6x06_Private_Function_Prototypes ft6x06 Private Function Prototypes
+ * @{
+ */
+static uint8_t ft6x06_GetInstance(uint16_t DeviceAddr);
+/* Private functions prototypes-----------------------------------------------*/
+#if (TS_AUTO_CALIBRATION_SUPPORTED == 1)
+/**
+ * @brief Start TouchScreen calibration phase
+ * @param DeviceAddr: FT6206 Device address for communication on I2C Bus.
+ * @retval Status FT6206_STATUS_OK or FT6206_STATUS_NOT_OK.
+ */
+static uint32_t ft6x06_TS_Calibration(uint16_t DeviceAddr);
+#endif /* TS_AUTO_CALIBRATION_SUPPORTED == 1 */
+
+/**
+ * @brief Basic static configuration of TouchScreen
+ * @param DeviceAddr: FT6206 Device address for communication on I2C Bus.
+ * @retval Status FT6206_STATUS_OK or FT6206_STATUS_NOT_OK.
+ */
+static uint32_t ft6x06_TS_Configure(uint16_t DeviceAddr);
+
+/**
+ * @}
+ */
+
+/** @defgroup ft6x06_Private_Functions ft6x06 Private Functions
+ * @{
+ */
+
+/**
+ * @brief Initialize the ft6x06 communication bus
+ * from MCU to FT6206 : ie I2C channel initialization (if required).
+ * @param DeviceAddr: Device address on communication Bus (I2C slave address of FT6206).
+ * @retval None
+ */
+void ft6x06_Init(uint16_t DeviceAddr)
+{
+ uint8_t instance;
+ uint8_t empty;
+
+ /* Check if device instance already exists */
+ instance = ft6x06_GetInstance(DeviceAddr);
+
+ /* To prevent double initialization */
+ if(instance == 0xFF)
+ {
+ /* Look for empty instance */
+ empty = ft6x06_GetInstance(0);
+
+ if(empty < FT6x06_MAX_INSTANCE)
+ {
+ /* Register the current device instance */
+ ft6x06[empty] = DeviceAddr;
+
+ /* Initialize IO BUS layer */
+ TS_IO_Init();
+ }
+ }
+}
+
+/**
+ * @brief Software Reset the ft6x06.
+ * @note : Not applicable to FT6206.
+ * @param DeviceAddr: Device address on communication Bus (I2C slave address of FT6206).
+ * @retval None
+ */
+void ft6x06_Reset(uint16_t DeviceAddr)
+{
+ /* Do nothing */
+ /* No software reset sequence available in FT6206 IC */
+}
+
+/**
+ * @brief Read the ft6x06 device ID, pre initialize I2C in case of need to be
+ * able to read the FT6206 device ID, and verify this is a FT6206.
+ * @param DeviceAddr: I2C FT6x06 Slave address.
+ * @retval The Device ID (two bytes).
+ */
+uint16_t ft6x06_ReadID(uint16_t DeviceAddr)
+{
+ /* Initialize I2C link if needed */
+ TS_IO_Init();
+
+ /* Return the device ID value */
+ return (TS_IO_Read(DeviceAddr, FT6206_CHIP_ID_REG));
+}
+
+/**
+ * @brief Configures the touch Screen IC device to start detecting touches
+ * It goes through an internal calibration process (Hw calibration sequence of
+ * the touch screen).
+ * @param DeviceAddr: Device address on communication Bus (I2C slave address).
+ * @retval None.
+ */
+void ft6x06_TS_Start(uint16_t DeviceAddr)
+{
+#if (TS_AUTO_CALIBRATION_SUPPORTED == 1)
+ /* Hw Calibration sequence start : should be done once after each power up */
+ /* This is called internal calibration of the touch screen */
+ ft6x06_TS_Calibration(DeviceAddr);
+#endif
+ /* Minimum static configuration of FT6206 */
+ ft6x06_TS_Configure(DeviceAddr);
+
+ /* By default set FT6206 IC in Polling mode : no INT generation on FT6206 for new touch available */
+ /* Note TS_INT is active low */
+ ft6x06_TS_DisableIT(DeviceAddr);
+}
+
+/**
+ * @brief Return if there is touches detected or not.
+ * Try to detect new touches and forget the old ones (reset internal global
+ * variables).
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval : Number of active touches detected (can be 0, 1 or 2).
+ */
+uint8_t ft6x06_TS_DetectTouch(uint16_t DeviceAddr)
+{
+ volatile uint8_t nbTouch = 0;
+
+ /* Read register FT6206_TD_STAT_REG to check number of touches detection */
+ nbTouch = TS_IO_Read(DeviceAddr, FT6206_TD_STAT_REG);
+ nbTouch &= FT6206_TD_STAT_MASK;
+
+ if(nbTouch > FT6206_MAX_DETECTABLE_TOUCH)
+ {
+ /* If invalid number of touch detected, set it to zero */
+ nbTouch = 0;
+ }
+
+ /* Update ft6x06 driver internal global : current number of active touches */
+ ft6x06_handle.currActiveTouchNb = nbTouch;
+
+ /* Reset current active touch index on which to work on */
+ ft6x06_handle.currActiveTouchIdx = 0;
+
+ return(nbTouch);
+}
+
+/**
+ * @brief Get the touch screen X and Y positions values
+ * Manage multi touch thanks to touch Index global
+ * variable 'ft6x06_handle.currActiveTouchIdx'.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param X: Pointer to X position value
+ * @param Y: Pointer to Y position value
+ * @retval None.
+ */
+void ft6x06_TS_GetXY(uint16_t DeviceAddr, uint16_t *X, uint16_t *Y)
+{
+ uint8_t regAddress = 0;
+ uint8_t dataxy[4];
+
+ if(ft6x06_handle.currActiveTouchIdx < ft6x06_handle.currActiveTouchNb)
+ {
+ switch(ft6x06_handle.currActiveTouchIdx)
+ {
+ case 0 :
+ regAddress = FT6206_P1_XH_REG;
+ break;
+ case 1 :
+ regAddress = FT6206_P2_XH_REG;
+ break;
+
+ default :
+ break;
+ }
+
+ /* Read X and Y positions */
+ TS_IO_ReadMultiple(DeviceAddr, regAddress, dataxy, sizeof(dataxy));
+
+ /* Send back ready X position to caller */
+ *X = ((dataxy[0] & FT6206_MSB_MASK) << 8) | (dataxy[1] & FT6206_LSB_MASK);
+
+ /* Send back ready Y position to caller */
+ *Y = ((dataxy[2] & FT6206_MSB_MASK) << 8) | (dataxy[3] & FT6206_LSB_MASK);
+
+ ft6x06_handle.currActiveTouchIdx++;
+ }
+}
+
+/**
+ * @brief Configure the FT6206 device to generate IT on given INT pin
+ * connected to MCU as EXTI.
+ * @param DeviceAddr: Device address on communication Bus (Slave I2C address of FT6206).
+ * @retval None
+ */
+void ft6x06_TS_EnableIT(uint16_t DeviceAddr)
+{
+ uint8_t regValue = 0;
+ regValue = (FT6206_G_MODE_INTERRUPT_TRIGGER & (FT6206_G_MODE_INTERRUPT_MASK >> FT6206_G_MODE_INTERRUPT_SHIFT)) << FT6206_G_MODE_INTERRUPT_SHIFT;
+
+ /* Set interrupt trigger mode in FT6206_GMODE_REG */
+ TS_IO_Write(DeviceAddr, FT6206_GMODE_REG, regValue);
+}
+
+/**
+ * @brief Configure the FT6206 device to stop generating IT on the given INT pin
+ * connected to MCU as EXTI.
+ * @param DeviceAddr: Device address on communication Bus (Slave I2C address of FT6206).
+ * @retval None
+ */
+void ft6x06_TS_DisableIT(uint16_t DeviceAddr)
+{
+ uint8_t regValue = 0;
+ regValue = (FT6206_G_MODE_INTERRUPT_POLLING & (FT6206_G_MODE_INTERRUPT_MASK >> FT6206_G_MODE_INTERRUPT_SHIFT)) << FT6206_G_MODE_INTERRUPT_SHIFT;
+
+ /* Set interrupt polling mode in FT6206_GMODE_REG */
+ TS_IO_Write(DeviceAddr, FT6206_GMODE_REG, regValue);
+}
+
+/**
+ * @brief Get IT status from FT6206 interrupt status registers
+ * Should be called Following an EXTI coming to the MCU to know the detailed
+ * reason of the interrupt.
+ * @note : This feature is not applicable to FT6206.
+ * @param DeviceAddr: Device address on communication Bus (I2C slave address of FT6206).
+ * @retval TS interrupts status : always return 0 here
+ */
+uint8_t ft6x06_TS_ITStatus(uint16_t DeviceAddr)
+{
+ /* Always return 0 as feature not applicable to FT6206 */
+ return 0;
+}
+
+/**
+ * @brief Clear IT status in FT6206 interrupt status clear registers
+ * Should be called Following an EXTI coming to the MCU.
+ * @note : This feature is not applicable to FT6206.
+ * @param DeviceAddr: Device address on communication Bus (I2C slave address of FT6206).
+ * @retval None
+ */
+void ft6x06_TS_ClearIT(uint16_t DeviceAddr)
+{
+ /* Nothing to be done here for FT6206 */
+}
+
+/**** NEW FEATURES enabled when Multi-touch support is enabled ****/
+
+#if (TS_MULTI_TOUCH_SUPPORTED == 1)
+
+/**
+ * @brief Get the last touch gesture identification (zoom, move up/down...).
+ * @param DeviceAddr: Device address on communication Bus (I2C slave address of FT6x06).
+ * @param pGestureId : Pointer to get last touch gesture Identification.
+ * @retval None.
+ */
+void ft6x06_TS_GetGestureID(uint16_t DeviceAddr, uint32_t * pGestureId)
+{
+ volatile uint8_t ucReadData = 0;
+
+ ucReadData = TS_IO_Read(DeviceAddr, FT6206_GEST_ID_REG);
+
+ * pGestureId = ucReadData;
+}
+
+/**
+ * @brief Get the touch detailed informations on touch number 'touchIdx' (0..1)
+ * This touch detailed information contains :
+ * - weight that was applied to this touch
+ * - sub-area of the touch in the touch panel
+ * - event of linked to the touch (press down, lift up, ...)
+ * @param DeviceAddr: Device address on communication Bus (I2C slave address of FT6x06).
+ * @param touchIdx : Passed index of the touch (0..1) on which we want to get the
+ * detailed information.
+ * @param pWeight : Pointer to to get the weight information of 'touchIdx'.
+ * @param pArea : Pointer to to get the sub-area information of 'touchIdx'.
+ * @param pEvent : Pointer to to get the event information of 'touchIdx'.
+
+ * @retval None.
+ */
+void ft6x06_TS_GetTouchInfo(uint16_t DeviceAddr,
+ uint32_t touchIdx,
+ uint32_t * pWeight,
+ uint32_t * pArea,
+ uint32_t * pEvent)
+{
+ uint8_t regAddress = 0;
+ uint8_t dataxy[3];
+
+ if(touchIdx < ft6x06_handle.currActiveTouchNb)
+ {
+ switch(touchIdx)
+ {
+ case 0 :
+ regAddress = FT6206_P1_WEIGHT_REG;
+ break;
+
+ case 1 :
+ regAddress = FT6206_P2_WEIGHT_REG;
+ break;
+
+ default :
+ break;
+
+ } /* end switch(touchIdx) */
+
+ /* Read weight, area and Event Id of touch index */
+ TS_IO_ReadMultiple(DeviceAddr, regAddress, dataxy, sizeof(dataxy));
+
+ /* Return weight of touch index */
+ * pWeight = (dataxy[0] & FT6206_TOUCH_WEIGHT_MASK) >> FT6206_TOUCH_WEIGHT_SHIFT;
+ /* Return area of touch index */
+ * pArea = (dataxy[1] & FT6206_TOUCH_AREA_MASK) >> FT6206_TOUCH_AREA_SHIFT;
+ /* Return Event Id of touch index */
+ * pEvent = (dataxy[2] & FT6206_TOUCH_EVT_FLAG_MASK) >> FT6206_TOUCH_EVT_FLAG_SHIFT;
+
+ } /* of if(touchIdx < ft6x06_handle.currActiveTouchNb) */
+}
+
+#endif /* TS_MULTI_TOUCH_SUPPORTED == 1 */
+
+#if (TS_AUTO_CALIBRATION_SUPPORTED == 1)
+/**
+ * @brief Start TouchScreen calibration phase
+ * @param DeviceAddr: FT6206 Device address for communication on I2C Bus.
+ * @retval Status FT6206_STATUS_OK or FT6206_STATUS_NOT_OK.
+ */
+static uint32_t ft6x06_TS_Calibration(uint16_t DeviceAddr)
+{
+ uint32_t nbAttempt = 0;
+ volatile uint8_t ucReadData;
+ volatile uint8_t regValue;
+ uint32_t status = FT6206_STATUS_OK;
+ uint8_t bEndCalibration = 0;
+
+ /* >> Calibration sequence start */
+
+ /* Switch FT6206 back to factory mode to calibrate */
+ regValue = (FT6206_DEV_MODE_FACTORY & FT6206_DEV_MODE_MASK) << FT6206_DEV_MODE_SHIFT;
+ TS_IO_Write(DeviceAddr, FT6206_DEV_MODE_REG, regValue); /* 0x40 */
+
+ /* Read back the same register FT6206_DEV_MODE_REG */
+ ucReadData = TS_IO_Read(DeviceAddr, FT6206_DEV_MODE_REG);
+ TS_IO_Delay(300); /* Wait 300 ms */
+
+ if(((ucReadData & (FT6206_DEV_MODE_MASK << FT6206_DEV_MODE_SHIFT)) >> FT6206_DEV_MODE_SHIFT) != FT6206_DEV_MODE_FACTORY )
+ {
+ /* Return error to caller */
+ return(FT6206_STATUS_NOT_OK);
+ }
+
+ /* Start calibration command */
+ TS_IO_Write(DeviceAddr, FT6206_TD_STAT_REG, 0x04);
+ TS_IO_Delay(300); /* Wait 300 ms */
+
+ /* 100 attempts to wait switch from factory mode (calibration) to working mode */
+ for (nbAttempt=0; ((nbAttempt < 100) && (!bEndCalibration)) ; nbAttempt++)
+ {
+ ucReadData = TS_IO_Read(DeviceAddr, FT6206_DEV_MODE_REG);
+ ucReadData = (ucReadData & (FT6206_DEV_MODE_MASK << FT6206_DEV_MODE_SHIFT)) >> FT6206_DEV_MODE_SHIFT;
+ if(ucReadData == FT6206_DEV_MODE_WORKING)
+ {
+ /* Auto Switch to FT6206_DEV_MODE_WORKING : means calibration have ended */
+ bEndCalibration = 1; /* exit for loop */
+ }
+
+ TS_IO_Delay(200); /* Wait 200 ms */
+ }
+
+ /* Calibration sequence end << */
+
+ return(status);
+}
+#endif /* TS_AUTO_CALIBRATION_SUPPORTED == 1 */
+
+/**
+ * @brief Basic static configuration of TouchScreen
+ * @param DeviceAddr: FT6206 Device address for communication on I2C Bus.
+ * @retval Status FT6206_STATUS_OK or FT6206_STATUS_NOT_OK.
+ */
+static uint32_t ft6x06_TS_Configure(uint16_t DeviceAddr)
+{
+ uint32_t status = FT6206_STATUS_OK;
+
+ /* Nothing special to be done for FT6206 */
+
+ return(status);
+}
+
+/**
+ * @brief Check if the device instance of the selected address is already registered
+ * and return its index
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval Index of the device instance if registered, 0xFF if not.
+ */
+static uint8_t ft6x06_GetInstance(uint16_t DeviceAddr)
+{
+ uint8_t idx = 0;
+
+ /* Check all the registered instances */
+ for(idx = 0; idx < FT6x06_MAX_INSTANCE ; idx ++)
+ {
+ if(ft6x06[idx] == DeviceAddr)
+ {
+ return idx;
+ }
+ }
+
+ return 0xFF;
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/