Tactility/Boards/UnPhone/Source/PowerOn.cpp

#include "TactilityCore.h"
#include "UnPhoneFeatures.h"
#include <esp_sleep.h>

#define TAG "unphone"

extern UnPhoneFeatures unPhoneFeatures;

static std::unique_ptr<tt::Thread> powerThread;

enum class PowerState {
    Initial,
    On,
    Off
};

#define DEBUG_POWER_STATES false

/** Helper method to use the buzzer to signal the different power stages */
static void powerInfoBuzz(uint8_t count) {
    if (DEBUG_POWER_STATES) {
        uint8_t index = 0;
        while (index < count) {
            unPhoneFeatures.setVibePower(true);
            tt::kernel::delayMillis(50);
            unPhoneFeatures.setVibePower(false);

            index++;

            if (index < count) {
                tt::kernel::delayMillis(100);
            }
        }
    }
}

static void updatePowerSwitch() {
    static PowerState last_state = PowerState::Initial;

    if (!unPhoneFeatures.isPowerSwitchOn()) {
        if (last_state != PowerState::Off) {
            last_state = PowerState::Off;
            TT_LOG_W(TAG, "Power off");
        }

        if (!unPhoneFeatures.isUsbPowerConnected()) { // and usb unplugged we go into shipping mode
            TT_LOG_W(TAG, "Shipping mode until USB connects");

            unPhoneFeatures.setExpanderPower(true);
            powerInfoBuzz(3);
            unPhoneFeatures.setExpanderPower(false);

            unPhoneFeatures.turnPeripheralsOff();

            unPhoneFeatures.setShipping(true); // tell BM to stop supplying power until USB connects
        } else { // When power switch is off, but USB is plugged in, we wait (deep sleep) until USB is unplugged.
            TT_LOG_W(TAG, "Waiting for USB disconnect to power off");

            powerInfoBuzz(2);
            unPhoneFeatures.turnPeripheralsOff();

            // Deep sleep for 1 minute, then awaken to check power state again
            // GPIO trigger from power switch also awakens the device
            unPhoneFeatures.wakeOnPowerSwitch();
            esp_sleep_enable_timer_wakeup(60000000);
            esp_deep_sleep_start();
        }
    } else {
        if (last_state != PowerState::On) {
            last_state = PowerState::On;
            TT_LOG_W(TAG, "Power on");

            unPhoneFeatures.setShipping(false);
            unPhoneFeatures.setExpanderPower(true);
            powerInfoBuzz(1);
        }
    }
}

static int32_t powerSwitchMain(void*) { // check power switch every 10th of sec
    while (true) {
        updatePowerSwitch();
        tt::kernel::delayMillis(200);
    }
}

static void startPowerSwitchThread() {
    powerThread = std::make_unique<tt::Thread>(
        "unphone_power_switch",
        4096,
        powerSwitchMain,
        nullptr
    );
    powerThread->start();
}

static bool unPhonePowerOn() {
    if (!unPhoneFeatures.init()) {
        TT_LOG_E(TAG, "UnPhoneFeatures init failed");
        return false;
    }

    unPhoneFeatures.printInfo();

    unPhoneFeatures.setBacklightPower(false);
    unPhoneFeatures.setVibePower(false);
    unPhoneFeatures.setIrPower(false);
    unPhoneFeatures.setExpanderPower(false);

    // Turn off the device if power switch is on off state,
    // instead of waiting for the Thread to start and continue booting
    updatePowerSwitch();
    startPowerSwitchThread();

    return true;
}

bool unPhoneInitPower() {
    ESP_LOGI(TAG, LOG_MESSAGE_POWER_ON_START);

    if (!unPhonePowerOn()) {
        TT_LOG_E(TAG, LOG_MESSAGE_POWER_ON_FAILED);
        return false;
    }

    return true;
}