better buttons polling

Core/Src/lcd.c

@@ -103,11 +103,15 @@ void LCD_Init(LCD_HandleTypeDef *lcd) {
     //http://nerdralph.blogspot.com/2014/07/controlling-hd44780-displays.html
     vTaskDelay(30);
     LCD_SendCommand(lcd, LCD_FUNCTIONSET | LCD_8BITMODE);
-    vTaskDelay(1);
+    vTaskDelay(5);
     LCD_SendCommand(lcd, LCD_FUNCTIONSET | LCD_8BITMODE);
-    vTaskDelay(1);
+    vTaskDelay(5);
     LCD_SendCommand(lcd, LCD_FUNCTIONSET | LCD_4BITMODE);
     vTaskDelay(1);
+    LCD_SendCommand(lcd, LCD_FUNCTIONSET | LCD_4BITMODE | LCD_SINGLELINE | LCD_5x8DOTS); // 0b00110000);
+    vTaskDelay(5);
+    LCD_SendCommand(lcd, LCD_FUNCTIONSET | LCD_4BITMODE | LCD_SINGLELINE | LCD_5x8DOTS); // 0b00110000);
+    vTaskDelay(5);
     LCD_SendCommand(lcd, LCD_FUNCTIONSET | LCD_4BITMODE | LCD_MULTILINE | LCD_5x8DOTS); // 0b00110000);
     vTaskDelay(5);
     // display & cursor home (keep this!)

Core/Src/main.c

@@ -455,9 +455,7 @@ static void MX_GPIO_Init(void)
 
 void vTaskPlayerSetup(void *parameter)
 {
-  vTaskDelay(500);
   LCD_Init(&hlcd);
-  vTaskDelay(100);
   LCD_MoveCursor(&hlcd, 0, 0);
   LCD_SendString(&hlcd, "Settings");
   LCD_MoveCursor(&hlcd, 1, 0);
@@ -624,17 +622,15 @@ void vTaskButtonPoll(void *parameter) {
     for(int i = 0; i<BUTTON_COUNT; i++)
     {
       bool state = HAL_GPIO_ReadPin(buttons[i].port, buttons[i].pin);
-      vTaskDelay(1);
+      if (state != buttons[i].pressed)
-      if (state && !buttons[i].temp)
+      {
-        buttons[i].temp = true;
+        vTaskDelay(100);
-      else if (state && buttons[i].temp)
+        state = HAL_GPIO_ReadPin(buttons[i].port, buttons[i].pin);
-        buttons[i].pressed = true;
+        if (state != buttons[i].pressed)
-      else if (!state && !buttons[i].temp)
+          buttons[i].pressed = !buttons[i].pressed;
-        buttons[i].pressed = false;
+      }
-      else if (!state && buttons[i].pressed)
+      vTaskDelay(100);
-        buttons[i].temp = false;
     }
-    vTaskDelay(50);
   }
 }
 /* USER CODE END 4 */