added feature to detect long button presses

Author: NightHawk32

AxxSolder_firmware/Core/Src/main.c

@@ -36,6 +36,8 @@
 /* USER CODE BEGIN PTD */
 #define version "3.0.2"
 
+#define BTN_LONG_PRESS 15 //*50ms (htim16 interval) --> 15 = 750ms
+
 #define DEBUG
 
 #ifdef DEBUG
@@ -83,6 +85,9 @@ uint8_t SW_ready = 1;
 uint8_t SW_1_pressed = 0;
 uint8_t SW_2_pressed = 0;
 uint8_t SW_3_pressed = 0;
+uint8_t SW_1_pressed_long = 0;
+uint8_t SW_2_pressed_long = 0;
+uint8_t SW_3_pressed_long = 0;
 
 /* states for runtime switch */
 typedef enum {
@@ -950,10 +955,13 @@ void get_handle_type(){
 }
 
 /* Interrupts at button press */
+static uint16_t btnPressed = 0;
 void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
 {
     if(((GPIO_Pin == SW_1_Pin) || (GPIO_Pin == SW_2_Pin) || (GPIO_Pin == SW_3_Pin)) && (SW_ready == 1)){ //A button is pressed
+    	btnPressed = GPIO_Pin;
 		HAL_TIM_Base_Start_IT(&htim16);
+		beep();
 		SW_ready = 0;
     }
 }
@@ -995,24 +1003,43 @@ void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim){
 	}
 
 	/* Button Debounce timer (50 ms) */
+	static uint8_t timerCycles = 0;
+
 	if ((htim == &htim16 && SW_ready == 0)){
-		if(HAL_GPIO_ReadPin(SW_1_GPIO_Port, SW_1_Pin) == GPIO_PIN_SET){
+		HAL_TIM_Base_Stop_IT(&htim16);
+		if(btnPressed == SW_1_Pin && HAL_GPIO_ReadPin(SW_1_GPIO_Port, SW_1_Pin) == GPIO_PIN_RESET){
 			SW_ready = 1;
 			SW_1_pressed = 1;
+			timerCycles = 0;
+		}else if(timerCycles > BTN_LONG_PRESS && btnPressed == SW_1_Pin && HAL_GPIO_ReadPin(SW_1_GPIO_Port, SW_1_Pin) == GPIO_PIN_SET){
+			SW_ready = 1;
 			beep();
-			HAL_TIM_Base_Stop_IT(&htim16);
+			SW_1_pressed_long = 1;
+			timerCycles = 0;
 		}
-		else if(HAL_GPIO_ReadPin(SW_2_GPIO_Port, SW_2_Pin) == GPIO_PIN_SET){
+		else if(btnPressed == SW_2_Pin && HAL_GPIO_ReadPin(SW_2_GPIO_Port, SW_2_Pin) == GPIO_PIN_RESET){
 			SW_ready = 1;
 			SW_2_pressed = 1;
+			timerCycles = 0;
+		}else if(timerCycles > BTN_LONG_PRESS && btnPressed == SW_2_Pin && HAL_GPIO_ReadPin(SW_2_GPIO_Port, SW_2_Pin) == GPIO_PIN_SET){
+			SW_ready = 1;
 			beep();
-			HAL_TIM_Base_Stop_IT(&htim16);
+			SW_2_pressed_long = 1;
+			timerCycles = 0;
 		}
-		else if(HAL_GPIO_ReadPin(SW_3_GPIO_Port, SW_3_Pin) == GPIO_PIN_SET){
+		else if(btnPressed == SW_3_Pin && HAL_GPIO_ReadPin(SW_3_GPIO_Port, SW_3_Pin) == GPIO_PIN_RESET){
 			SW_ready = 1;
 			SW_3_pressed = 1;
+			timerCycles = 0;
+		}
+		else if(timerCycles > BTN_LONG_PRESS && btnPressed == SW_3_Pin && HAL_GPIO_ReadPin(SW_3_GPIO_Port, SW_3_Pin) == GPIO_PIN_SET){
+			SW_ready = 1;
 			beep();
-			HAL_TIM_Base_Stop_IT(&htim16);
+			SW_3_pressed_long = 1;
+			timerCycles = 0;
+		}else{
+			HAL_TIM_Base_Start_IT(&htim16);
+			timerCycles++;
 		}
 	}
 }