LowPower BLE

gistfile1.txt

#include "SdFat.h"
#include "Adafruit_SPIFlash.h"

#if defined(CUSTOM_CS) && defined(CUSTOM_SPI)
Adafruit_FlashTransport_SPI flashTransport(CUSTOM_CS, CUSTOM_SPI);

#elif defined(ARDUINO_ARCH_ESP32)
// ESP32 use same flash device that store code.
// Therefore there is no need to specify the SPI and SS
Adafruit_FlashTransport_ESP32 flashTransport;

#else
// On-board external flash (QSPI or SPI) macros should already
// defined in your board variant if supported
// - EXTERNAL_FLASH_USE_QSPI
// - EXTERNAL_FLASH_USE_CS/EXTERNAL_FLASH_USE_SPI
#if defined(EXTERNAL_FLASH_USE_QSPI)
Adafruit_FlashTransport_QSPI flashTransport;

#elif defined(EXTERNAL_FLASH_USE_SPI)
Adafruit_FlashTransport_SPI flashTransport(EXTERNAL_FLASH_USE_CS, EXTERNAL_FLASH_USE_SPI);

#else
#error No QSPI/SPI flash are defined on your board variant.h !
#endif
#endif

Adafruit_SPIFlash flash(&flashTransport);

#include <bluefruit.h>

void startAdv(void)
{
  // Advertising packet
  Bluefruit.setName("DROID");
  Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);
  Bluefruit.Advertising.addTxPower();
  Bluefruit.Advertising.addName();

  Bluefruit.Advertising.restartOnDisconnect(true);
  Bluefruit.autoConnLed(false);

  Bluefruit.Advertising.setInterval(244, 244); // in unit of 0.625 ms
  Bluefruit.Advertising.setFastTimeout(1);     // number of seconds in fast mode
  Bluefruit.Advertising.start(0);             // 0 = Don't stop advertising after n seconds
}

void disconnectPin(uint32_t ulPin)
{
  if (ulPin >= PINS_COUNT)
  {
    return;
  }

  ulPin = g_ADigitalPinMap[ulPin];

  NRF_GPIO_Type *port = nrf_gpio_pin_port_decode(&ulPin);

  port->PIN_CNF[ulPin] =
      ((uint32_t)GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos) | ((uint32_t)GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos) | ((uint32_t)GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) | ((uint32_t)GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) | ((uint32_t)GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos);
}

void setup()
{

  flash.begin();
  Bluefruit.begin();
  Bluefruit.setTxPower(-40); // Check bluefruit.h for supported values
  flashTransport.begin();
  if (flashTransport.runCommand(0xB9)== false)
  {
    pinMode(LED_BUILTIN, OUTPUT);
    digitalWrite(LED_BUILTIN, LOW);
    while (1)
    {
      yield();
    }
  }

  flashTransport.end();

  flash.end();

  for (int i = 0; i < 25; i++)
  {
    disconnectPin(i);
  }
  sd_power_mode_set(NRF_POWER_MODE_LOWPWR);
  sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE);
    startAdv();
    suspendLoop();
  __WFE();
  __WFI();
  sd_app_evt_wait();
}

void loop()
{
  __WFE();
  __WFI();
  sd_app_evt_wait();
}