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pigweed / third_party / github / FreeRTOS / FreeRTOS-Kernel / 9c0c37ab9b56f2c90085b78df2f58b5833e473db / . / FreeRTOS / Demo / CORTEX_M7_M4_AMP_STM32H745I_Discovery_IAR / ST_code / BSP / STM32H745I-Discovery / stm32h745i_discovery_ts.c
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/**
******************************************************************************
* @file stm32h745i_discovery_ts.c
* @author MCD Application Team
* @brief This file provides a set of functions needed to manage the Touch
* Screen on STM32H745I_DISCOVERY discovery board.
******************************************************************************
* @attention
*
* <h2><center>&copy; 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
*
******************************************************************************
*/
/*
@verbatim
1. How To use this driver:
--------------------------
- This driver is used to drive the touch screen module of the STM32H745I_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.
*/
/* Dependencies
- stm32h745_discovery_lcd.c
- ft5336.c
EndDependencies */
/* Includes ------------------------------------------------------------------*/
#include "stm32h745i_discovery.h"
#include "stm32h745i_discovery_ts.h"
/** @addtogroup BSP
* @{
*/
/** @addtogroup STM32H745I_DISCOVERY
* @{
*/
/** @defgroup STM32H745I_DISCOVERY_TS STM32H745I_DISCOVERY_TS
* @{
*/
/** @defgroup STM32H745I_DISCOVERY_TS_Private_Variables Private Variables
* @{
*/
static TS_DrvTypeDef *tsDriver;
static uint16_t tsXBoundary, tsYBoundary;
static uint8_t tsOrientation;
static uint8_t I2cAddress;
/* 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 STM32H745I_DISCOVERY_TS_Private_Function_Prototypes Private Function Prototypes
* @{
*/
/**
* @}
*/
/** @defgroup STM32H745I_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 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_FREQ_VERY_HIGH;
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);
}
/**
* @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****/