Unclever first attempt at display sleep.

firmware/application/event_m0.cpp

@@ -99,6 +99,7 @@ void EventDispatcher::dispatch(const eventmask_t events) {
 		handle_rtc_tick();
 	}
 	
+	if( !display_sleep ) {
 		if( events & EVT_MASK_LCD_FRAME_SYNC ) {
 			handle_lcd_frame_sync();
 		}
@@ -115,6 +116,7 @@ void EventDispatcher::dispatch(const eventmask_t events) {
 			handle_touch();
 		}
 	}
+}
 
 void EventDispatcher::handle_application_queue() {
 	std::array<uint8_t, Message::MAX_SIZE> message_buffer;

firmware/application/event_m0.hpp

@@ -27,6 +27,8 @@
 #include "ui_widget.hpp"
 #include "ui_painter.hpp"
 
+#include "portapack.hpp"
+
 #include "message.hpp"
 
 #include "touch.hpp"
@@ -53,6 +55,11 @@ public:
 	void run();
 	void request_stop();
 
+	void set_display_sleep(bool new_value) {
+		portapack::io.lcd_backlight(false);
+		display_sleep = new_value;
+	};
+
 	static inline void events_flag(const eventmask_t events) {
 		if( thread_event_loop ) {
 			chEvtSignal(thread_event_loop, events);
@@ -80,6 +87,7 @@ private:
 	uint32_t encoder_last = 0;
 	bool is_running = true;
 	bool sd_card_present = false;
+	bool display_sleep = false;
 
 	eventmask_t wait();
 	void dispatch(const eventmask_t events);

firmware/application/main.cpp

@@ -81,6 +81,11 @@ int main(void) {
 			event_dispatcher.request_stop();
 		}
 	);
+	EventDispatcher::message_map().register_handler(Message::ID::DisplaySleep,
+		[&event_dispatcher](const Message* const) {
+			event_dispatcher.set_display_sleep(true);
+		}
+	);
 
 	m4_init(portapack::spi_flash::baseband, portapack::memory::map::m4_code);
 

firmware/application/ui_navigation.cpp

@@ -22,6 +22,7 @@
 #include "ui_navigation.hpp"
 
 #include "portapack.hpp"
+#include "event_m0.hpp"
 #include "receiver_model.hpp"
 
 #include "ui_setup.hpp"
@@ -42,6 +43,7 @@ SystemStatusView::SystemStatusView() {
 	add_children({ {
 		&button_back,
 		&title,
+		&button_sleep,
 		&sd_card_status_view,
 	} });
 	sd_card_status_view.set_parent_rect({ 28 * 8, 0 * 16,  2 * 8, 1 * 16 });
@@ -51,6 +53,11 @@ SystemStatusView::SystemStatusView() {
 			this->on_back();
 		}
 	};
+
+	button_sleep.on_select = [this](Button&) {
+		DisplaySleepMessage message;
+		EventDispatcher::message_map().send(&message);
+	};
 }
 
 void SystemStatusView::set_back_visible(bool new_value) {

firmware/application/ui_navigation.hpp

@@ -59,6 +59,11 @@ private:
 		default_title,
 	};
 
+	Button button_sleep {
+		{ 25 * 8, 0, 2 * 8, 1 * 16 },
+		"ZZ",
+	};
+
 	SDCardStatusView sd_card_status_view;
 };
 

firmware/common/message.hpp

@@ -58,6 +58,7 @@ public:
 		AMConfigure = 13,
 		ChannelSpectrumConfig = 14,
 		SpectrumStreamingConfig = 15,
+		DisplaySleep = 16,
 		MAX
 	};
 
@@ -165,6 +166,14 @@ struct AudioStatistics {
 	}
 };
 
+class DisplaySleepMessage : public Message {
+public:
+	constexpr DisplaySleepMessage(
+	) : Message { ID::DisplaySleep }
+	{
+	}
+};
+
 class AudioStatisticsMessage : public Message {
 public:
 	constexpr AudioStatisticsMessage(