Squash of branch setup

main/display/display.h.old

@@ -0,0 +1,42 @@
+#pragma once
+#include "driver/spi_master.h"
+#include "driver/gpio.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_lcd_touch_gt911.h"
+#include "display/constants.h"
+#include <driver/i2c.h>
+
+class DisplayHandler {
+public:
+  DisplayHandler(
+    EventGroupHandle_t system_event_group
+  ) : _system_event_group(system_event_group) { }
+  virtual ~DisplayHandler();
+  
+  // required to be called by inheriting class after SPI device is created
+  // set set_display_ready to false if further initialization is needed before marking display ready
+  virtual void init_devices(bool set_display_ready = true);
+
+protected:
+  // Allow derived classes to access touch handle
+  esp_lcd_touch_handle_t get_touch_handle() const { return _tp_handle; }
+
+  void epd_write_cmd(uint8_t cmd);
+  void epd_write_data(uint8_t data);
+
+  void epd_write_cmd_with_data(uint8_t cmd, const uint8_t* data, size_t data_len);
+
+protected:
+  SemaphoreHandle_t _spi_mutex = xSemaphoreCreateMutex();
+  spi_device_handle_t _spi = nullptr;
+  EventGroupHandle_t _system_event_group = nullptr;
+  esp_lcd_panel_io_handle_t _tp_io_handle = nullptr;
+  esp_lcd_touch_handle_t _tp_handle = nullptr;
+
+  void _dangerous_epd_write_cmd_without_lock(uint8_t cmd);
+  void _dangerous_epd_write_data_without_lock(uint8_t data);
+
+  void _epd_init(void);
+  void _touch_init(void);
+};