MeshCore/src/helpers/TBeamBoard.h

#pragma once


#include <Wire.h>
#include <Arduino.h>
#include "XPowersLib.h"

// Defined using AXP2102
#define XPOWERS_CHIP_AXP2101
#define PIN_BOARD_SDA1 42  //SDA for PMU and PFC8563 (RTC)
#define PIN_BOARD_SCL1 41  //SCL for PMU and PFC8563 (RTC)
#define PIN_PMU_IRQ 40     //IRQ pin for PMU

// LoRa radio module pins for TBeam
#define  P_LORA_DIO_0   26
#define  P_LORA_DIO_2   32
#define  P_LORA_DIO_1   33
#define  P_LORA_NSS     18
#define  P_LORA_RESET   14
#define  P_LORA_BUSY    RADIOLIB_NC
#define  P_LORA_SCLK     5
#define  P_LORA_MISO    19
#define  P_LORA_MOSI    27

// built-ins
//#define  PIN_VBAT_READ   37
//#define  PIN_LED_BUILTIN 25

#include "ESP32Board.h"

#include <driver/rtc_io.h>

class TBeamBoard : public ESP32Board {
  XPowersLibInterface *PMU = NULL;
public:
  bool power_init();
  void printPMU();

  void begin() {
    ESP32Board::begin();
    pinMode(38, INPUT_PULLUP);

    esp_reset_reason_t reason = esp_reset_reason();
    if (reason == ESP_RST_DEEPSLEEP) {
      long wakeup_source = esp_sleep_get_ext1_wakeup_status();
      if (wakeup_source & (1 << P_LORA_DIO_1)) {  // received a LoRa packet (while in deep sleep)
        startup_reason = BD_STARTUP_RX_PACKET;
      }

      rtc_gpio_hold_dis((gpio_num_t)P_LORA_NSS);
      rtc_gpio_deinit((gpio_num_t)P_LORA_DIO_1);
    }
    power_init();
  }

  void enterDeepSleep(uint32_t secs, int pin_wake_btn = -1) {
    esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_ON);

    // Make sure the DIO1 and NSS GPIOs are hold on required levels during deep sleep
    rtc_gpio_set_direction((gpio_num_t)P_LORA_DIO_1, RTC_GPIO_MODE_INPUT_ONLY);
    rtc_gpio_pulldown_en((gpio_num_t)P_LORA_DIO_1);

    rtc_gpio_hold_en((gpio_num_t)P_LORA_NSS);

    if (pin_wake_btn < 0) {
      esp_sleep_enable_ext1_wakeup( (1L << P_LORA_DIO_1), ESP_EXT1_WAKEUP_ANY_HIGH);  // wake up on: recv LoRa packet
    } else {
      esp_sleep_enable_ext1_wakeup( (1L << P_LORA_DIO_1) | (1L << pin_wake_btn), ESP_EXT1_WAKEUP_ANY_HIGH);  // wake up on: recv LoRa packet OR wake btn
    }

    if (secs > 0) {
      esp_sleep_enable_timer_wakeup(secs * 1000000);
    }

    // Finally set ESP32 into sleep
    esp_deep_sleep_start();   // CPU halts here and never returns!
  }

  uint16_t getBattMilliVolts() override {
    if(PMU) return PMU->getBattVoltage();
    else return 0;
  }

  const char* getManufacturerName() const override {
    return "LilyGo T-Beam";
  }
};