Add V2 implementation (not tested)

Versuch2/Core/Src/main.c

@@ -23,6 +23,7 @@
 /* USER CODE BEGIN Includes */
 #include "display.h"
 #include "fonts.h"
+#include <stdbool.h>
 
 /* USER CODE END Includes */
 
@@ -41,6 +42,17 @@
 
 #define BUTTON_GPIO_PORT GPIOA
 #define BUTTON_GPIO_PIN GPIO_PIN_0
+
+#define TOUCH_EVENT_IS_PRESSED 8
+#define TOUCH_EVENT_NOT_PRESSED 4
+#define TOUCH_EVENT_JUST_PRESSED 0
+
+// calibrate touch display
+#define CAL_TOUCH_TOP_LEFT_X 0
+#define CAL_TOUCH_TOP_LEFT_Y 0
+#define CAL_TOUCH_BOT_RIGHT_X 200
+#define CAL_TOUCH_BOT_RIGHT_Y 200
+
 /* USER CODE END PD */
 
 /* Private macro -------------------------------------------------------------*/
@@ -87,6 +99,26 @@ uint32_t time_msPassedSince(uint32_t timestampOld)
 
 
 
+static inline int32_t clamp_i16(int32_t value, int32_t min, int32_t max)
+{
+    if (value < min) return min;
+    if (value > max) return max;
+    return value;
+}
+
+// function for drawing a button either pressed or released
+void drawButton(bool isPressed){
+	if (isPressed){
+		Display_FillRect( 75, 130, 100, 100, LCD_COLOR_RED );
+		Display_DrawRect( 74, 129, 102, 102, LCD_COLOR_RED );
+	}
+	else {
+		Display_FillRect( 75, 130, 100, 100, LCD_COLOR_BLACK );
+		Display_DrawRect( 74, 129, 102, 102, LCD_COLOR_RED );
+	}
+
+}
+
 
 /* USER CODE END 0 */
 
@@ -126,10 +158,18 @@ int main(void)
 
   Display_Init();
   // local variables
-  uint32_t timestamp_lastBlinked   = HAL_GetTick();
+  uint32_t timestamp_lastCounted   = HAL_GetTick();
-  uint32_t timestamp_lastButtonPolled = timestamp_lastBlinked;
+  uint32_t timestamp_lastTouchRead   = HAL_GetTick();
-  uint32_t timestamp_lastHelloPrinted = timestamp_lastBlinked;
+  uint8_t i = 100;
-  uint8_t printCount = 0;
+  uint8_t DataRx[4];
+  uint8_t Eventflag = TOUCH_EVENT_NOT_PRESSED, EventflagLast = TOUCH_EVENT_NOT_PRESSED;
+  uint16_t xRaw, yRaw;
+  int32_t xTouch, yTouch;
+  bool buttonIsPressed;
+
+
+
+  drawButton(false);
 
   /* USER CODE END 2 */
 
@@ -137,44 +177,72 @@ int main(void)
   /* USER CODE BEGIN WHILE */
   while (1)
   {
+	  // display 100 count down
+	  if (time_msPassedSince(timestamp_lastCounted) >= 100) {
+		  timestamp_lastCounted = HAL_GetTick();
+		  Display_Printf( 0, 10,
+		  		LCD_COLOR_WHITE, LCD_COLOR_BLACK,
+		  		&FontBig,
+				"Zahl %d", i
+		  	      );
+		  if (i == 0) i = 100;
+		  else i--;
+	  }
 
-	  uint8_t DataRx[4];
-	  //...
-	  uint8_t Eventflag;
-	  uint16_t xTouch, yTouch;
 
+
+	  // every 20ms: read touch, print values, convert values, draw pixel, handle button
+	  if (time_msPassedSince(timestamp_lastTouchRead) >= 20) { // run this block every 20ms
+		  timestamp_lastTouchRead = HAL_GetTick();
+		  // read touch register
+		  HAL_I2C_Mem_Read(I2C3, 112, 3, I2C_MEMADD_SIZE_8BIT, DataRx, 4, 1000);
+
+		  // interpret received data
+		  EventflagLast = Eventflag;
 		  Eventflag = (uint8_t)(DataRx[0] >> 4);
+		  yRaw = (uint16_t)((DataRx[0] & 0b00001111) << 8) | (uint16_t)DataRx[1];
+		  xRaw = (uint16_t)((DataRx[2] & 0b00001111) << 8) | (uint16_t)DataRx[3];
 
-	  yTouch = (uint16_t)((DataRx[0] & 0b00001111) << 8) | (uint16_t)DataRx[1];
+		  // show pos values on display
+		  if (Eventflag == TOUCH_EVENT_IS_PRESSED) printf("is pressed \n");
+		  Display_Printf( 0, 30,
+		  		LCD_COLOR_WHITE, LCD_COLOR_BLACK,
+		  		&FontBig,
+				"x=%d y=%d", xRaw, yRaw
+		  	    );
 
-	  xTouch = (uint16_t)((DataRx[2] & 0b00001111) << 8) | (uint16_t)DataRx[3];
+		  //scale to display size
+		  xTouch = 239 * ((int32_t)xRaw - CAL_TOUCH_TOP_LEFT_X) / ((int32_t)CAL_TOUCH_BOT_RIGHT_X - CAL_TOUCH_TOP_LEFT_X);
+		  yTouch = 239 * ((int32_t)yRaw - CAL_TOUCH_TOP_LEFT_Y) / ((int32_t)CAL_TOUCH_BOT_RIGHT_Y - CAL_TOUCH_TOP_LEFT_Y);
+		  xTouch = clamp_i16(xTouch, 0, 239);
+		  yTouch = clamp_i16(yTouch, 0, 239);
 
-	  // blink blue led (toggle state every 500ms)
+
-	  if (time_msPassedSince(timestamp_lastBlinked) >= 500) {
+		  // draw position when pressed
-		  //HAL_GPIO_TogglePin(LED_BLUE_GPIO_PORT, LED_BLUE_GPIO_PIN);
+		  if (Eventflag == TOUCH_EVENT_IS_PRESSED){
-		  HAL_GPIO_TogglePin(LED_BLUE_GPIO_PORT, LED_BLUE_GPIO_PIN);
+			  Display_DrawPixel( (uint16_t)xTouch, (uint16_t)yTouch, LCD_COLOR_WHITE );
-		  //printf("toggle blue led\n\r");
-		  timestamp_lastBlinked = HAL_GetTick();
 		  }
 
-	  // poll button every 25ms and set red-led accordingly
-	  if (time_msPassedSince(timestamp_lastButtonPolled) >= 25) {
-		  GPIO_PinState buttonState = HAL_GPIO_ReadPin(BUTTON_GPIO_PORT, BUTTON_GPIO_PIN);
-		  //printf("buttonState = %d\n\r", buttonState);
-		  HAL_GPIO_WritePin(LED_RED_GPIO_PORT, LED_RED_GPIO_PIN, buttonState);
-		  timestamp_lastButtonPolled = HAL_GetTick();
-	  }
 
-	  // print "Hallo Welt" via UART every 1000ms
+		  // determine button pressed condition
-	  if (time_msPassedSince(timestamp_lastHelloPrinted) >= 1000) {
+		  bool isInsideButtonArea = xTouch > 75 && xTouch < (75+100)  && yTouch > 130 && yTouch < (130+100);
-		  printf("Hallo Welt %d\n\r", printCount++);
+		  bool touchIsPressed = Eventflag == TOUCH_EVENT_IS_PRESSED;
-		  timestamp_lastHelloPrinted = HAL_GetTick();
+
-	  }
+		  bool buttonIsPressedLast = buttonIsPressed;
+		  buttonIsPressed = isInsideButtonArea && touchIsPressed;
+
+		  // just got pressed -> draw pressed button
+		  if (buttonIsPressed && !buttonIsPressedLast) drawButton(true);
+		  // just got released -> draw released button
+		  if (!buttonIsPressed && buttonIsPressedLast) drawButton(false);
+
+	  } // end "run every 20ms"
+
 
     /* USER CODE END WHILE */
 
     /* USER CODE BEGIN 3 */
-  }
+  } //end while(1)
   /* USER CODE END 3 */
 }
 

Versuch2/Debug/Core/Src/main.cyclo

@@ -1,10 +1,12 @@
-../Core/Src/main.c:76:5:_write	1
+../Core/Src/main.c:81:5:_write	1
-../Core/Src/main.c:83:10:time_msPassedSince	1
+../Core/Src/main.c:88:10:time_msPassedSince	1
-../Core/Src/main.c:97:5:main	4
+../Core/Src/main.c:95:23:clamp_i16	3
-../Core/Src/main.c:185:6:SystemClock_Config	4
+../Core/Src/main.c:103:6:drawButton	2
-../Core/Src/main.c:242:13:MX_I2C3_Init	4
+../Core/Src/main.c:122:5:main	16
-../Core/Src/main.c:290:13:MX_USART6_UART_Init	2
+../Core/Src/main.c:249:6:SystemClock_Config	4
-../Core/Src/main.c:321:13:MX_FMC_Init	2
+../Core/Src/main.c:306:13:MX_I2C3_Init	4
-../Core/Src/main.c:379:13:MX_GPIO_Init	1
+../Core/Src/main.c:354:13:MX_USART6_UART_Init	2
-../Core/Src/main.c:757:6:HAL_TIM_PeriodElapsedCallback	2
+../Core/Src/main.c:385:13:MX_FMC_Init	2
-../Core/Src/main.c:775:6:Error_Handler	1
+../Core/Src/main.c:443:13:MX_GPIO_Init	1
+../Core/Src/main.c:821:6:HAL_TIM_PeriodElapsedCallback	2
+../Core/Src/main.c:839:6:Error_Handler	1

Versuch2/Debug/Core/Src/main.su

@@ -1,10 +1,12 @@
-../Core/Src/main.c:76:5:_write	24	static
+../Core/Src/main.c:81:5:_write	24	static
-../Core/Src/main.c:83:10:time_msPassedSince	16	static
+../Core/Src/main.c:88:10:time_msPassedSince	16	static
-../Core/Src/main.c:97:5:main	32	static
+../Core/Src/main.c:95:23:clamp_i16	24	static
-../Core/Src/main.c:185:6:SystemClock_Config	88	static
+../Core/Src/main.c:103:6:drawButton	24	static
-../Core/Src/main.c:242:13:MX_I2C3_Init	8	static
+../Core/Src/main.c:122:5:main	56	static
-../Core/Src/main.c:290:13:MX_USART6_UART_Init	8	static
+../Core/Src/main.c:249:6:SystemClock_Config	88	static
-../Core/Src/main.c:321:13:MX_FMC_Init	40	static
+../Core/Src/main.c:306:13:MX_I2C3_Init	8	static
-../Core/Src/main.c:379:13:MX_GPIO_Init	64	static
+../Core/Src/main.c:354:13:MX_USART6_UART_Init	8	static
-../Core/Src/main.c:757:6:HAL_TIM_PeriodElapsedCallback	16	static
+../Core/Src/main.c:385:13:MX_FMC_Init	40	static
-../Core/Src/main.c:775:6:Error_Handler	4	static,ignoring_inline_asm
+../Core/Src/main.c:443:13:MX_GPIO_Init	64	static
+../Core/Src/main.c:821:6:HAL_TIM_PeriodElapsedCallback	16	static
+../Core/Src/main.c:839:6:Error_Handler	4	static,ignoring_inline_asm