MeshCore/variants/generic_espnow/target.cpp

#include <Arduino.h>
#include "target.h"
#include <helpers/ArduinoHelpers.h>

ESP32Board board;

ESPNOWRadio radio_driver;

ESP32RTCClock rtc_clock;

bool radio_init() {
  rtc_clock.begin();

  radio_driver.init();

  return true;  // success
}

uint32_t radio_get_rng_seed() {
  return millis() + radio_driver.intID();  // TODO: where to get some entropy?
}

void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
  // no-op
}

void radio_set_tx_power(uint8_t dbm) {
  radio_driver.setTxPower(dbm);
}

// NOTE: as we are using the WiFi radio, the ESP_IDF will have enabled hardware RNG:
//    https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/system/random.html
class ESP_RNG : public mesh::RNG {
public:
  void random(uint8_t* dest, size_t sz) override {
    esp_fill_random(dest, sz);
  }
};

mesh::LocalIdentity radio_new_identity() {
  ESP_RNG rng;
  return mesh::LocalIdentity(&rng);  // create new random identity
}