ST
BSP files for STM32H747I-Discovery Copy from ST Cube delivery
Dependents: DISCO_H747I_LCD_demo DISCO_H747I_AUDIO_demo
Diff: STM32H747I-Discovery/stm32h747i_discovery_ts.c
- Revision:
- 0:146cf26a9bbb
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/STM32H747I-Discovery/stm32h747i_discovery_ts.c Wed Sep 25 13:37:39 2019 +0200
@@ -0,0 +1,419 @@
+/**
+ ******************************************************************************
+ * @file stm32h747i_discovery_ts.c
+ * @author MCD Application Team
+ * @brief This file provides a set of functions needed to manage the Touch
+ * Screen on STM32H747I_DISCOVERY discovery board.
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© Copyright (c) 2019 STMicroelectronics.
+ * All rights reserved.</center></h2>
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+/* File Info : -----------------------------------------------------------------
+ User NOTES
+1. How To use this driver:
+--------------------------
+ - This driver is used to drive the touch screen module of the STM32H747I_DISCOVERY
+ discovery board on the K.O.D Optica Technology 480x800 TFT-LCD mounted on
+ MB1166 daughter board. The touch screen driver IC inside the K.O.D module KM-040TMP-02
+ is a FT6206 by Focal Tech.
+
+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 The IT is handled using the corresponding external interrupt IRQ handler,
+ the user IT callback treatment is implemented on the same external interrupt
+ callback.
+
+------------------------------------------------------------------------------*/
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32h747i_discovery.h"
+#include "stm32h747i_discovery_ts.h"
+
+/** @addtogroup BSP
+ * @{
+ */
+
+/** @addtogroup STM32H747I_DISCOVERY
+ * @{
+ */
+
+/** @defgroup STM32H747I_DISCOVERY_TS STM32H747I_DISCOVERY_TS
+ * @{
+ */
+
+/** @defgroup STM32H747I_DISCOVERY_TS_Private_Variables Private Variables
+ * @{
+ */
+static TS_DrvTypeDef *ts_driver;
+static uint8_t ts_orientation;
+static uint8_t I2C_Address = 0;
+
+/* Table for touchscreen event information display on LCD : table indexed on enum @ref TS_TouchEventTypeDef information */
+char * ts_event_string_tab[TOUCH_EVENT_NB_MAX] = { "None",
+ "Press down",
+ "Lift up",
+ "Contact"
+ };
+
+/* Table for touchscreen gesture Id information display on LCD : table indexed on enum @ref TS_GestureIdTypeDef information */
+char * ts_gesture_id_string_tab[GEST_ID_NB_MAX] = { "None",
+ "Move Up",
+ "Move Right",
+ "Move Down",
+ "Move Left",
+ "Zoom In",
+ "Zoom Out"
+ };
+
+/**
+ * @}
+ */
+
+/** @defgroup STM32H747I_DISCOVERY_TS_Exported_Functions 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 ts_status = TS_OK;
+ uint8_t ts_id1, ts_id2 = 0;
+ /* Note : I2C_Address is un-initialized here, but is not used at all in init function */
+ /* but the prototype of Init() is like that in template and should be respected */
+
+ /* Initialize the communication channel to sensor (I2C) if necessary */
+ /* that is initialization is done only once after a power up */
+ ft6x06_ts_drv.Init(I2C_Address);
+
+ ts_id1 = ft6x06_ts_drv.ReadID(TS_I2C_ADDRESS);
+ if(ts_id1 != FT6206_ID_VALUE)
+ {
+ ts_id2 = ft6x06_ts_drv.ReadID(TS_I2C_ADDRESS_A02);
+ I2C_Address = TS_I2C_ADDRESS_A02;
+ }
+ else
+ {
+ I2C_Address = TS_I2C_ADDRESS;
+ }
+
+ /* Scan FT6xx6 TouchScreen IC controller ID register by I2C Read */
+ /* Verify this is a FT6206 or FT6336G, otherwise this is an error case */
+ if((ts_id1 == FT6206_ID_VALUE) || (ts_id2 == FT6206_ID_VALUE))
+ {
+ /* Found FT6206 : Initialize the TS driver structure */
+ ts_driver = &ft6x06_ts_drv;
+
+ /* Get LCD chosen orientation */
+ if(ts_SizeX < ts_SizeY)
+ {
+ ts_orientation = TS_SWAP_NONE;
+ }
+ else
+ {
+ ts_orientation = TS_SWAP_XY | TS_SWAP_Y;
+ }
+
+ if(ts_status == TS_OK)
+ {
+ /* Software reset the TouchScreen */
+ ts_driver->Reset(I2C_Address);
+
+ /* Calibrate, Configure and Start the TouchScreen driver */
+ ts_driver->Start(I2C_Address);
+
+ } /* of if(ts_status == TS_OK) */
+ }
+ else
+ {
+ ts_status = TS_DEVICE_NOT_FOUND;
+ }
+
+ return (ts_status);
+}
+
+/**
+ * @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)
+{
+ uint8_t ts_status = TS_OK;
+ GPIO_InitTypeDef gpio_init_structure;
+
+ /* Msp Init of GPIO used for TS_INT pin coming from TouchScreen driver IC FT6x06 */
+ /* When touchscreen is operated in interrupt mode */
+ BSP_TS_INT_MspInit();
+
+ /* Configure Interrupt mode for TS_INT pin falling edge : when a new touch is available */
+ /* TS_INT pin is active on low level on new touch available */
+ gpio_init_structure.Pin = TS_INT_PIN;
+ gpio_init_structure.Pull = GPIO_PULLUP;
+ gpio_init_structure.Speed = GPIO_SPEED_FREQ_HIGH;
+ gpio_init_structure.Mode = GPIO_MODE_IT_FALLING;
+ HAL_GPIO_Init(TS_INT_GPIO_PORT, &gpio_init_structure);
+
+ /* Enable and set the TS_INT EXTI Interrupt to an intermediate priority */
+ HAL_NVIC_SetPriority((IRQn_Type)(TS_INT_EXTI_IRQn), 0x0F, 0x00);
+ HAL_NVIC_EnableIRQ((IRQn_Type)(TS_INT_EXTI_IRQn));
+
+ /* Enable the TS in interrupt mode */
+ /* In that case the INT output of FT6206 when new touch is available */
+ /* is active on low level and directed on EXTI */
+ ts_driver->EnableIT(I2C_Address);
+
+ return (ts_status);
+}
+
+/**
+ * @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 tmp;
+ uint16_t Raw_x[TS_MAX_NB_TOUCH];
+ uint16_t Raw_y[TS_MAX_NB_TOUCH];
+ uint16_t xDiff;
+ uint16_t yDiff;
+ 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 = ts_driver->DetectTouch(I2C_Address);
+ if(TS_State->touchDetected)
+ {
+ for(index=0; index < TS_State->touchDetected; index++)
+ {
+ /* Get each touch coordinates */
+ ts_driver->GetXY(I2C_Address, &(Raw_x[index]), &(Raw_y[index]));
+
+ if(ts_orientation & TS_SWAP_XY)
+ {
+ tmp = Raw_x[index];
+ Raw_x[index] = Raw_y[index];
+ Raw_y[index] = tmp;
+ }
+
+ if(ts_orientation & TS_SWAP_X)
+ {
+ Raw_x[index] = FT_6206_MAX_WIDTH - 1 - Raw_x[index];
+ }
+
+ if(ts_orientation & TS_SWAP_Y)
+ {
+ Raw_y[index] = FT_6206_MAX_HEIGHT - 1 - Raw_y[index];
+ }
+
+ xDiff = Raw_x[index] > _x[index]? (Raw_x[index] - _x[index]): (_x[index] - Raw_x[index]);
+ yDiff = Raw_y[index] > _y[index]? (Raw_y[index] - _y[index]): (_y[index] - Raw_y[index]);
+
+ if ((xDiff + yDiff) > 5)
+ {
+ _x[index] = Raw_x[index];
+ _y[index] = Raw_y[index];
+ }
+
+
+ TS_State->touchX[index] = _x[index];
+ TS_State->touchY[index] = _y[index];
+
+#if (TS_MULTI_TOUCH_SUPPORTED == 1)
+
+ /* Get touch info related to the current touch */
+ ft6x06_TS_GetTouchInfo(I2C_Address, index, &weight, &area, &event);
+
+ /* Update TS_State structure */
+ TS_State->touchWeight[index] = weight;
+ TS_State->touchArea[index] = area;
+
+ /* Remap touch event */
+ switch(event)
+ {
+ case FT6206_TOUCH_EVT_FLAG_PRESS_DOWN :
+ TS_State->touchEventId[index] = TOUCH_EVENT_PRESS_DOWN;
+ break;
+ case FT6206_TOUCH_EVT_FLAG_LIFT_UP :
+ TS_State->touchEventId[index] = TOUCH_EVENT_LIFT_UP;
+ break;
+ case FT6206_TOUCH_EVT_FLAG_CONTACT :
+ TS_State->touchEventId[index] = TOUCH_EVENT_CONTACT;
+ break;
+ case FT6206_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 */
+ ft6x06_TS_GetGestureID(I2C_Address, &gestureId);
+
+ /* Remap gesture Id to a TS_GestureIdTypeDef value */
+ switch(gestureId)
+ {
+ case FT6206_GEST_ID_NO_GESTURE :
+ TS_State->gestureId = GEST_ID_NO_GESTURE;
+ break;
+ case FT6206_GEST_ID_MOVE_UP :
+ TS_State->gestureId = GEST_ID_MOVE_UP;
+ break;
+ case FT6206_GEST_ID_MOVE_RIGHT :
+ TS_State->gestureId = GEST_ID_MOVE_RIGHT;
+ break;
+ case FT6206_GEST_ID_MOVE_DOWN :
+ TS_State->gestureId = GEST_ID_MOVE_DOWN;
+ break;
+ case FT6206_GEST_ID_MOVE_LEFT :
+ TS_State->gestureId = GEST_ID_MOVE_LEFT;
+ break;
+ case FT6206_GEST_ID_ZOOM_IN :
+ TS_State->gestureId = GEST_ID_ZOOM_IN;
+ break;
+ case FT6206_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 */
+
+
+#if (TS_MULTI_TOUCH_SUPPORTED == 1)
+/**
+ * @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);
+}
+#endif /* TS_MULTI_TOUCH_SUPPORTED == 1 */
+
+/**
+ * @brief Initializes the TS_INT pin MSP.
+ * @retval None
+ */
+__weak void BSP_TS_INT_MspInit(void)
+{
+ GPIO_InitTypeDef gpio_init_structure;
+
+ TS_INT_GPIO_CLK_ENABLE();
+
+ /* GPIO configuration in input for TouchScreen interrupt signal on TS_INT pin */
+ gpio_init_structure.Pin = TS_INT_PIN;
+
+ gpio_init_structure.Mode = GPIO_MODE_INPUT;
+ gpio_init_structure.Pull = GPIO_PULLUP;
+ gpio_init_structure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
+ HAL_GPIO_Init(TS_INT_GPIO_PORT, &gpio_init_structure);
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/