#include <stdbool.h>
#include <stdint.h>
#include "nrf.h"

#include <BLE_API.h>

const int red = 6;
const int green = 9;

void setup() 
{

  Serial.begin(9600);
  
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
  
  // put your setup code here, to run once:
  
  // If desired, change the RAM retention parameters:
  NRF_POWER->RAMON = POWER_RAMON_ONRAM0_RAM0On   << POWER_RAMON_ONRAM0_Pos
                     | POWER_RAMON_ONRAM1_RAM1On   << POWER_RAMON_ONRAM1_Pos
                     | POWER_RAMON_OFFRAM0_RAM0Off << POWER_RAMON_OFFRAM0_Pos
                     | POWER_RAMON_OFFRAM1_RAM1Off << POWER_RAMON_OFFRAM1_Pos;

   digitalWrite(red, LOW);
   digitalWrite(green, LOW);
   delay(2000);
}

void loop() 
{
  Serial.println("Awake 1");
  delay(500);

  __SEV();
  __WFE();

  //*************************
  //Without using softdevice
  //*************************
  //1.
  //__WFE();

  //2.
  //__WFI();


  //*****************
  //Using softdevice
  //*****************
  //1.
  sd_app_evt_wait();

  // Enter system OFF. After wakeup the chip will be reset, and the MCU will run from the top 
  //NRF_POWER->SYSTEMOFF = 1;
  //NRF_POWER->TASKS_LOWPWR = 1;
  
  delay(500);
  Serial.println("Awake 2");
  digitalWrite(green, HIGH);
  delay(500);
  digitalWrite(green, LOW);

}