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128 lines
3.5 KiB
C++
128 lines
3.5 KiB
C++
#pragma once
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#include <cstring>
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#include <OLEDDisplayUi.h>
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#include <SSD1306Wire.h>
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#include "PeriodicTask.h"
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#include "TypedQueue.h"
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namespace meshtastic
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{
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/// Deals with showing things on the screen of the device.
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//
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// Other than setup(), this class is thread-safe. All state-changing calls are
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// queued and executed when the main loop calls us.
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class Screen : public PeriodicTask
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{
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public:
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Screen(uint8_t address, uint8_t sda, uint8_t scl);
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Screen(const Screen &) = delete;
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Screen &operator=(const Screen &) = delete;
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/// Initializes the UI, turns on the display, starts showing boot screen.
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//
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// Not thread safe - must be called before any other methods are called.
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void setup();
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/// Turns the screen on/off.
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void setOn(bool on) { enqueueCmd(CmdItem{.cmd = on ? Cmd::SET_ON : Cmd::SET_OFF}); }
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/// Handles a button press.
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void onPress() { enqueueCmd(CmdItem{.cmd = Cmd::ON_PRESS}); }
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/// Starts showing the Bluetooth PIN screen.
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//
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// Switches over to a static frame showing the Bluetooth pairing screen
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// with the PIN.
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void startBluetoothPinScreen(uint32_t pin)
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{
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CmdItem cmd;
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cmd.cmd = Cmd::START_BLUETOOTH_PIN_SCREEN;
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cmd.bluetooth_pin = pin;
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enqueueCmd(cmd);
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}
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/// Stops showing the bluetooth PIN screen.
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void stopBluetoothPinScreen() { enqueueCmd(CmdItem{.cmd = Cmd::STOP_BLUETOOTH_PIN_SCREEN}); }
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/// Stops showing the boot screen.
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void stopBootScreen() { enqueueCmd(CmdItem{.cmd = Cmd::STOP_BOOT_SCREEN}); }
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/// Writes a string to the screen.
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void print(const char *text)
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{
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CmdItem cmd;
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cmd.cmd = Cmd::PRINT;
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// TODO(girts): strdup() here is scary, but we can't use std::string as
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// FreeRTOS queue is just dumbly copying memory contents. It would be
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// nice if we had a queue that could copy objects by value.
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cmd.print_text = strdup(text);
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if (!enqueueCmd(cmd)) {
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free(cmd.print_text);
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}
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}
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protected:
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/// Updates the UI.
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//
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// Called periodically from the main loop.
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void doTask() final;
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private:
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enum class Cmd {
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INVALID,
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SET_ON,
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SET_OFF,
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ON_PRESS,
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START_BLUETOOTH_PIN_SCREEN,
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STOP_BLUETOOTH_PIN_SCREEN,
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STOP_BOOT_SCREEN,
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PRINT,
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};
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struct CmdItem {
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Cmd cmd;
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union {
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uint32_t bluetooth_pin;
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char *print_text;
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};
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};
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/// Enques given command item to be processed by main loop().
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bool enqueueCmd(const CmdItem &cmd)
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{
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bool success = cmdQueue.enqueue(cmd, 0);
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setPeriod(1); // handle ASAP
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return success;
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}
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// Implementations of various commands, called from doTask().
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void handleSetOn(bool on);
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void handleOnPress();
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void handleStartBluetoothPinScreen(uint32_t pin);
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void handlePrint(const char *text);
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/// Rebuilds our list of frames (screens) to default ones.
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void setFrames();
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private:
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/// Queue of commands to execute in doTask.
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TypedQueue<CmdItem> cmdQueue;
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/// Whether we are using a display
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bool useDisplay = false;
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/// Whether the display is currently powered
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bool screenOn = false;
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// Whether we are showing the regular screen (as opposed to booth screen or
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// Bluetooth PIN screen)
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bool showingNormalScreen = false;
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/// Display device
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SSD1306Wire dispdev;
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/// UI helper for rendering to frames and switching between them
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OLEDDisplayUi ui;
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};
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} // namespace meshtastic
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