- Fixed drawing of round objects (Circles, Rounded Rects) using a lookup table

- Added function to read out the display_buffer via USB-Serial
 - Added basic structure and files for later complete firmware (still in progress)
 - Added Doc folder with schematic in it
 - Added Python script and batch file to read out the display buffer and open the image in gimp

Firmware/Switch.c

@@ -0,0 +1,95 @@
+/*
+ * Switch.c
+ *
+ * Created: Sat Jan 28 2023 15:21:38
+ *  Author Chris
+ */
+// ============================================================================================
+// Includes
+#include "Switch.h"
+
+#include "pico/time.h"
+#include "pico/types.h"
+#include "pico/stdlib.h"
+#include "hardware/gpio.h"
+
+
+// ============================================================================================
+// Defines
+#define SWITCH_GPIO					23
+
+#define GPIO_IRQ_LEVEL_LOW 			1
+#define GPIO_IRQ_LEVEL_HIGH			2
+#define GPIO_IRQ_EDGE_FALL			4
+#define GPIO_IRQ_EDGE_RISE			8
+
+#define SWITCH_IDLE					1
+#define SWITCH_PRESSED				0
+
+#define DEBOUNCE_TIME_SWITCH_MS		300	
+
+
+// ============================================================================================
+// Variables
+volatile uint32_t	_Debounce_Time_Switch_ms;
+volatile bool		_Switch_Press_Occurred;
+
+
+// ============================================================================================
+// Function Declarations
+
+
+/*******************************************************************
+	Interrupt Service Routines
+*******************************************************************/
+
+// Interrupt Service Routine from Rotary Encoder also used for this one
+
+// void ISR_Switch(uint gpio, uint32_t events)
+// {
+// 	if(gpio == SWITCH_GPIO)
+// 	{
+// 		uint32_t Current_Time_ms = to_ms_since_boot(get_absolute_time());
+
+// 		if(Current_Time_ms < _Debounce_Time_Switch_ms)
+// 		{
+// 			return;
+// 		}
+
+// 		_Switch_Press_Occurred = true;
+
+// 		_Debounce_Time_Switch_ms = Current_Time_ms + DEBOUNCE_TIME_SWITCH_MS;
+// 	}
+// }
+
+/*******************************************************************
+	Functions
+*******************************************************************/
+void Switch_Init(bool use_pullup)
+{
+	_Debounce_Time_Switch_ms 	= 0;
+	_Switch_Press_Occurred 		= false;
+	
+	gpio_init(SWITCH_GPIO);	gpio_set_dir(SWITCH_GPIO, false);
+
+	if(use_pullup == SWITCH_USE_INTERNAL_PULLUP) {
+		gpio_pull_up(SWITCH_GPIO);
+	}
+
+	// ISR from Rotery Encoder used for Switch as well. See file Rotary_Encoder.c
+	gpio_set_irq_enabled(SWITCH_GPIO, GPIO_IRQ_EDGE_FALL, true);
+}
+
+bool Switch_Press_Occurred(void)
+{
+	bool Return_Value = _Switch_Press_Occurred;
+
+	_Switch_Press_Occurred = false;
+
+	return Return_Value;
+}
+
+
+/*******************************************************************
+	Internal Functions
+*******************************************************************/