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/**
******************************************************************************
* @file BSP/Src/touchscreen.c
* @author MCD Application Team
* @brief This example code shows how to use the touchscreen driver.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/** @addtogroup STM32F4xx_HAL_Examples
* @{
*/
/** @addtogroup BSP
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define CIRCLE_RADIUS 40
/* Private macro -------------------------------------------------------------*/
#define CIRCLE_XPOS(i) ((i * BSP_LCD_GetXSize()) / 5)
#define CIRCLE_YPOS(i) (BSP_LCD_GetYSize() - CIRCLE_RADIUS - 60)
/* Private Structures and Enumerations ------------------------------------------------------------*/
/* Possible allowed indexes of touchscreen demo */
typedef enum
{
TOUCHSCREEN_DEMO_1 = 1,
TOUCHSCREEN_DEMO_2 = 2,
TOUCHSCREEN_DEMO_3 = 3,
TOUCHSCREEN_DEMO_MAX = TOUCHSCREEN_DEMO_3,
} TouchScreenDemoTypeDef;
/* Global variables ---------------------------------------------------------*/
TS_StateTypeDef TS_State = {0};
/* Private variables ---------------------------------------------------------*/
/* Static variable holding the current touch color index : used to change color at each touch */
static uint32_t touchscreen_color_idx = 0;
/* Private function prototypes -----------------------------------------------*/
static void Touchscreen_SetHint_Demo(TouchScreenDemoTypeDef demoIndex);
static void Touchscreen_DrawBackground_Demo1(uint8_t state);
static uint32_t Touchscreen_Handle_NewTouch(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Touchscreen Demo1 : test touchscreen calibration and single touch in polling mode
* @param None
* @retval None
*/
void Touchscreen_demo1(void)
{
uint16_t x1, y1;
uint8_t state = 0;
uint8_t exitTsUseCase = 0;
uint32_t ts_status = TS_OK;
/* Reset touch data information */
BSP_TEST_APPLI_ASSERT(BSP_TS_ResetTouchData(&TS_State));
/* If calibration is not yet done, proceed with calibration */
if (TouchScreen_IsCalibrationDone() == 0)
{
ts_status = Touchscreen_Calibration();
if (ts_status == TS_OK)
{
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 65, (uint8_t *) "Touchscreen calibration success.", CENTER_MODE);
}
} /* of if (TouchScreen_IsCalibrationDone() == 0) */
if(ts_status == TS_OK)
{
/* Display touch screen demo description */
Touchscreen_SetHint_Demo(TOUCHSCREEN_DEMO_1);
Touchscreen_DrawBackground_Demo1(state);
while (exitTsUseCase == 0)
{
if (ts_status == TS_OK)
{
/* Check in polling mode in touch screen the touch status and coordinates */
/* of touches if touch occurred */
ts_status = BSP_TS_GetState(&TS_State);
if(TS_State.touchDetected)
{
/* One or dual touch have been detected */
/* Only take into account the first touch so far */
/* Get X and Y position of the first touch post calibrated */
x1 = TouchScreen_Get_Calibrated_X(TS_State.touchX[0]);
y1 = TouchScreen_Get_Calibrated_Y(TS_State.touchY[0]);
if ((y1 > (CIRCLE_YPOS(1) - CIRCLE_RADIUS)) &&
(y1 < (CIRCLE_YPOS(1) + CIRCLE_RADIUS)))
{
if ((x1 > (CIRCLE_XPOS(1) - CIRCLE_RADIUS)) &&
(x1 < (CIRCLE_XPOS(1) + CIRCLE_RADIUS)))
{
if ((state & 1) == 0)
{
Touchscreen_DrawBackground_Demo1(state);
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_FillCircle(CIRCLE_XPOS(1), CIRCLE_YPOS(1), CIRCLE_RADIUS);
state = 1;
}
}
if ((x1 > (CIRCLE_XPOS(2) - CIRCLE_RADIUS)) &&
(x1 < (CIRCLE_XPOS(2) + CIRCLE_RADIUS)))
{
if ((state & 2) == 0)
{
Touchscreen_DrawBackground_Demo1(state);
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_FillCircle(CIRCLE_XPOS(2), CIRCLE_YPOS(2), CIRCLE_RADIUS);
state = 2;
}
}
if ((x1 > (CIRCLE_XPOS(3) - CIRCLE_RADIUS)) &&
(x1 < (CIRCLE_XPOS(3) + CIRCLE_RADIUS)))
{
if ((state & 4) == 0)
{
Touchscreen_DrawBackground_Demo1(state);
BSP_LCD_SetTextColor(LCD_COLOR_YELLOW);
BSP_LCD_FillCircle(CIRCLE_XPOS(3), CIRCLE_YPOS(3), CIRCLE_RADIUS);
state = 4;
}
}
if ((x1 > (CIRCLE_XPOS(4) - CIRCLE_RADIUS)) &&
(x1 < (CIRCLE_XPOS(4) + CIRCLE_RADIUS)))
{
if ((state & 8) == 0)
{
Touchscreen_DrawBackground_Demo1(state);
BSP_LCD_SetTextColor(LCD_COLOR_GREEN);
BSP_LCD_FillCircle(CIRCLE_XPOS(4), CIRCLE_YPOS(3), CIRCLE_RADIUS);
state = 8;
}
}
}
} /* of if(TS_State.TouchDetected) */
} /* of if (ts_status == TS_OK) */
/* Wait for a key button press to switch to next test case of BSP validation application */
/* Otherwise stay in the test */
exitTsUseCase = CheckForUserInput();
HAL_Delay(20);
} /* of while (exitTsUseCase == 0) */
} /* of if(status == TS_OK) */
}
#if (TS_MULTI_TOUCH_SUPPORTED == 1)
/**
* @brief Touchscreen Demo2 : test touchscreen single and dual touch in polling mode
* @param None
* @retval None
*/
void Touchscreen_demo2(void)
{
uint8_t exitTsUseCase = 0;
uint32_t ts_status = TS_OK;
/* Reset touch data information */
BSP_TEST_APPLI_ASSERT(BSP_TS_ResetTouchData(&TS_State));
/* If calibration is not yet done, this is an error : touchscreen demo 1 should have been run before anyway */
if (TouchScreen_IsCalibrationDone() == 1)
{
} /* of if (TouchScreen_IsCalibrationDone() == 1) */
else
{
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 65, (uint8_t *)"ERROR : touchscreen not yet calibrated.", CENTER_MODE);
ts_status = TS_ERROR;
}
if(ts_status == TS_OK)
{
/* Display touch screen demo2 description */
Touchscreen_SetHint_Demo(TOUCHSCREEN_DEMO_2);
while (exitTsUseCase == 0)
{
Touchscreen_Handle_NewTouch();
/* Wait for a key button press to switch to next test case of BSP validation application */
/* Otherwise stay in the test */
exitTsUseCase = CheckForUserInput();
HAL_Delay(100);
} /* of while (exitTsUseCase == 0) */
} /* of if(status == TS_OK) */
}
/**
* @brief Touchscreen Demo3 : test touchscreen single and dual touch in interrupt mode
* @param None
* @retval None
*/
void Touchscreen_demo3(void)
{
uint8_t exitTsUseCase = 0;
uint32_t ts_status = TS_OK;
/* Reset touch data information */
BSP_TEST_APPLI_ASSERT(BSP_TS_ResetTouchData(&TS_State));
/* If calibration is not yet done, this is an error : touchscreen demo 1 should have been run before anyway */
if (TouchScreen_IsCalibrationDone() == 0)
{
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 65, (uint8_t *)"ERROR : touchscreen not yet calibrated.", CENTER_MODE);
ts_status = TS_ERROR;
}
if(ts_status == TS_OK)
{
/* Display touch screen demo3 description */
Touchscreen_SetHint_Demo(TOUCHSCREEN_DEMO_3);
/* Set touchscreen in Interrupt mode and program MFX accordingly to receipt INT falling edge from MFX */
/* and generate EXTI when occurs */
ts_status = BSP_TS_ITConfig();
BSP_TEST_APPLI_ASSERT(ts_status != TS_OK);
while (exitTsUseCase == 0)
{
/* In order to avoid using I2C to ask MFX when not need (e.g. BSP_TS_ITGetStatus) */
/* check first if EXTI occurred */
/* Note : variable 'ts_exti_received' is set to 1b1' by HAL_GPIO_EXTI_Callback() */
if(mfx_exti_received == 1)
{
mfx_exti_received = 0;
if(BSP_TS_ITGetStatus() == TS_IRQ_PENDING)
{
/* Clear first BSP TS IRQ */
BSP_TS_ITClear();
/* Handle the new touch */
Touchscreen_Handle_NewTouch();
}
}
/* Wait for a key button press to switch to next test case of BSP validation application */
/* Otherwise stay in the test */
exitTsUseCase = CheckForUserInput();
HAL_Delay(10);
} /* of while (exitTsUseCase == 0) */
} /* of if(status == TS_OK) */
}
/**
* @brief Touchscreen_Handle_NewTouch: factorization of touch management
* @param None
* @retval TS_OK or TS_ERROR
*/
static uint32_t Touchscreen_Handle_NewTouch(void)
{
#define TS_MULTITOUCH_FOOTPRINT_CIRCLE_RADIUS 15
#define TOUCH_INFO_STRING_SIZE 70
uint16_t x1 = 0;
uint16_t y1 = 0;
uint16_t x2 = 0;
uint16_t y2 = 0;
uint32_t drawTouch1 = 0; /* activate/deactivate draw of footprint of touch 1 */
uint32_t drawTouch2 = 0; /* activate/deactivate draw of footprint of touch 2 */
uint32_t colors[24] = {LCD_COLOR_BLUE, LCD_COLOR_GREEN, LCD_COLOR_RED, LCD_COLOR_CYAN, LCD_COLOR_MAGENTA, LCD_COLOR_YELLOW,
LCD_COLOR_LIGHTBLUE, LCD_COLOR_LIGHTGREEN, LCD_COLOR_LIGHTRED, LCD_COLOR_LIGHTCYAN, LCD_COLOR_LIGHTMAGENTA,
LCD_COLOR_LIGHTYELLOW, LCD_COLOR_DARKBLUE, LCD_COLOR_DARKGREEN, LCD_COLOR_DARKRED, LCD_COLOR_DARKCYAN,
LCD_COLOR_DARKMAGENTA, LCD_COLOR_DARKYELLOW, LCD_COLOR_LIGHTGRAY, LCD_COLOR_GRAY, LCD_COLOR_DARKGRAY,
LCD_COLOR_BLACK, LCD_COLOR_BROWN, LCD_COLOR_ORANGE };
uint32_t ts_status = TS_OK;
uint8_t lcd_string[TOUCH_INFO_STRING_SIZE] = "";
/* Check in polling mode in touch screen the touch status and coordinates */
/* of touches if touch occurred */
ts_status = BSP_TS_GetState(&TS_State);
if(TS_State.touchDetected)
{
/* One or dual touch have been detected */
/* Erase previous information on touchscreen play pad area */
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_FillRect(0, 80, BSP_LCD_GetXSize(), BSP_LCD_GetYSize() - 160);
/* Re-Draw touch screen play area on LCD */
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_DrawRect(10, 90, BSP_LCD_GetXSize() - 20, BSP_LCD_GetYSize() - 180);
BSP_LCD_DrawRect(11, 91, BSP_LCD_GetXSize() - 22, BSP_LCD_GetYSize() - 182);
/* Erase previous information on bottom text bar */
BSP_LCD_FillRect(0, BSP_LCD_GetYSize() - 80, BSP_LCD_GetXSize(), 80);
/* Deactivate drawing footprint of touch 1 and touch 2 until validated against boundaries of touch pad values */
drawTouch1 = drawTouch2 = 0;
/* Get X and Y position of the first touch post calibrated */
x1 = TouchScreen_Get_Calibrated_X(TS_State.touchX[0]);
y1 = TouchScreen_Get_Calibrated_Y(TS_State.touchY[0]);
if((y1 > (90 + TS_MULTITOUCH_FOOTPRINT_CIRCLE_RADIUS)) &&
(y1 < (BSP_LCD_GetYSize() - 90 - TS_MULTITOUCH_FOOTPRINT_CIRCLE_RADIUS)))
{
drawTouch1 = 1;
}
/* If valid touch 1 position : inside the reserved area for the use case : draw the touch */
if(drawTouch1 == 1)
{
/* Draw circle of first touch : turn on colors[] table */
BSP_LCD_SetTextColor(colors[(touchscreen_color_idx++ % 24)]);
BSP_LCD_FillCircle(x1, y1, TS_MULTITOUCH_FOOTPRINT_CIRCLE_RADIUS);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_SetFont(&Font16);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 70, (uint8_t *)"TOUCH INFO : ", CENTER_MODE);
BSP_LCD_SetFont(&Font12);
sprintf((char*)lcd_string, "x1 = %d, y1 = %d, Event = %s, Weight = %d",
x1,
y1,
ts_event_string_tab[TS_State.touchEventId[0]],
TS_State.touchWeight[0]);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 45, lcd_string, CENTER_MODE);
} /* of if(drawTouch1 == 1) */
if(TS_State.touchDetected > 1)
{
/* Get X and Y position of the second touch post calibrated */
x2 = TouchScreen_Get_Calibrated_X(TS_State.touchX[1]);
y2 = TouchScreen_Get_Calibrated_Y(TS_State.touchY[1]);
if((y2 > (90 + TS_MULTITOUCH_FOOTPRINT_CIRCLE_RADIUS)) &&
(y2 < (BSP_LCD_GetYSize() - 90 - TS_MULTITOUCH_FOOTPRINT_CIRCLE_RADIUS)))
{
drawTouch2 = 1;
}
/* If valid touch 2 position : inside the reserved area for the use case : draw the touch */
if(drawTouch2 == 1)
{
sprintf((char*)lcd_string, "x2 = %d, y2 = %d, Event = %s, Weight = %d",
x2,
y2,
ts_event_string_tab[TS_State.touchEventId[1]],
TS_State.touchWeight[1]);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 35, lcd_string, CENTER_MODE);
/* Draw circle of second touch : turn on color[] table */
BSP_LCD_SetTextColor(colors[(touchscreen_color_idx++ % 24)]);
BSP_LCD_FillCircle(x2, y2, TS_MULTITOUCH_FOOTPRINT_CIRCLE_RADIUS);
} /* of if(drawTouch2 == 1) */
} /* of if(TS_State.touchDetected > 1) */
if((drawTouch1 == 1) || (drawTouch2 == 1))
{
/* Get updated gesture Id in global variable 'TS_State' */
ts_status = BSP_TS_Get_GestureId(&TS_State);
sprintf((char*)lcd_string, "Gesture Id = %s", ts_gesture_id_string_tab[TS_State.gestureId]);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 15, lcd_string, CENTER_MODE);
}
else
{
/* Invalid touch position */
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 70, (uint8_t *)"Invalid touch position : use drawn touch area : ", CENTER_MODE);
}
} /* of if(TS_State.TouchDetected) */
return(ts_status);
}
#endif /* TS_MULTI_TOUCH_SUPPORTED == 1 */
/**
* @brief Display TS Demo Hint for all touchscreen demos depending on passed
* demoIndex in parameter.
* @param demoIndex : parameter of type @ref TouchScreenDemoTypeDef
* @retval None
*/
static void Touchscreen_SetHint_Demo(TouchScreenDemoTypeDef demoIndex)
{
if(demoIndex <= TOUCHSCREEN_DEMO_MAX)
{
/* Clear the LCD */
BSP_LCD_Clear(LCD_COLOR_WHITE);
/* Set Touchscreen Demo1 description */
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_FillRect(0, 0, BSP_LCD_GetXSize(), 80);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_SetBackColor(LCD_COLOR_BLUE);
BSP_LCD_SetFont(&Font24);
if(demoIndex == TOUCHSCREEN_DEMO_1)
{
BSP_LCD_DisplayStringAt(0, 0, (uint8_t *)"Touchscreen basic polling", CENTER_MODE);
BSP_LCD_SetFont(&Font12);
BSP_LCD_DisplayStringAt(0, 30, (uint8_t *)"Please use the Touchscreen to", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 45, (uint8_t *)"activate the colored circle", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 60, (uint8_t *)"inside the rectangle. Then press TAMPER button", CENTER_MODE);
}
else if (demoIndex == TOUCHSCREEN_DEMO_2)
{
BSP_LCD_DisplayStringAt(0, 0, (uint8_t *)"Touchscreen dual touch polling", CENTER_MODE);
BSP_LCD_SetFont(&Font12);
BSP_LCD_DisplayStringAt(0, 30, (uint8_t *)"Please press the Touchscreen to", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 45, (uint8_t *)"activate single and", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 60, (uint8_t *)"dual touch", CENTER_MODE);
}
else /* demoIndex == TOUCHSCREEN_DEMO_3 */
{
BSP_LCD_DisplayStringAt(0, 0, (uint8_t *)"Touchscreen dual touch interrupt", CENTER_MODE);
BSP_LCD_SetFont(&Font12);
BSP_LCD_DisplayStringAt(0, 30, (uint8_t *)"Please press the Touchscreen to", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 45, (uint8_t *)"activate single and", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 60, (uint8_t *)"dual touch", CENTER_MODE);
}
/* Set the LCD Text Color */
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_DrawRect(10, 90, BSP_LCD_GetXSize() - 20, BSP_LCD_GetYSize() - 100);
BSP_LCD_DrawRect(11, 91, BSP_LCD_GetXSize() - 22, BSP_LCD_GetYSize() - 102);
} /* of if(demoIndex <= TOUCHSCREEN_DEMO_MAX) */
}
/**
* @brief Draw Touchscreen Background
* @param state : touch zone state
* @retval None
*/
static void Touchscreen_DrawBackground_Demo1 (uint8_t state)
{
switch (state)
{
case 0:
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_FillCircle(CIRCLE_XPOS(1), CIRCLE_YPOS(1), CIRCLE_RADIUS);
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_FillCircle(CIRCLE_XPOS(2), CIRCLE_YPOS(2), CIRCLE_RADIUS);
BSP_LCD_SetTextColor(LCD_COLOR_YELLOW);
BSP_LCD_FillCircle(CIRCLE_XPOS(3), CIRCLE_YPOS(3), CIRCLE_RADIUS);
BSP_LCD_SetTextColor(LCD_COLOR_GREEN);
BSP_LCD_FillCircle(CIRCLE_XPOS(4), CIRCLE_YPOS(3), CIRCLE_RADIUS);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_FillCircle(CIRCLE_XPOS(1), CIRCLE_YPOS(1), CIRCLE_RADIUS - 2);
BSP_LCD_FillCircle(CIRCLE_XPOS(2), CIRCLE_YPOS(2), CIRCLE_RADIUS - 2);
BSP_LCD_FillCircle(CIRCLE_XPOS(3), CIRCLE_YPOS(3), CIRCLE_RADIUS - 2);
BSP_LCD_FillCircle(CIRCLE_XPOS(4), CIRCLE_YPOS(3), CIRCLE_RADIUS - 2);
break;
case 1:
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_FillCircle(CIRCLE_XPOS(1), CIRCLE_YPOS(1), CIRCLE_RADIUS);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_FillCircle(CIRCLE_XPOS(1), CIRCLE_YPOS(1), CIRCLE_RADIUS - 2);
break;
case 2:
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_FillCircle(CIRCLE_XPOS(2), CIRCLE_YPOS(2), CIRCLE_RADIUS);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_FillCircle(CIRCLE_XPOS(2), CIRCLE_YPOS(2), CIRCLE_RADIUS - 2);
break;
case 4:
BSP_LCD_SetTextColor(LCD_COLOR_YELLOW);
BSP_LCD_FillCircle(CIRCLE_XPOS(3), CIRCLE_YPOS(3), CIRCLE_RADIUS);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_FillCircle(CIRCLE_XPOS(3), CIRCLE_YPOS(3), CIRCLE_RADIUS - 2);
break;
case 8:
BSP_LCD_SetTextColor(LCD_COLOR_GREEN);
BSP_LCD_FillCircle(CIRCLE_XPOS(4), CIRCLE_YPOS(4), CIRCLE_RADIUS);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_FillCircle(CIRCLE_XPOS(4), CIRCLE_YPOS(4), CIRCLE_RADIUS - 2);
break;
}
}
/**
* @}
*/
/**
* @}
*/