LowPower and EPPROM SODAQ Autonoma

1

Hi there,

I’ve got a number of your automona boards that I’m try to get working with lora (the libelium that uses the SX1272 rather than LoRaWan) and Pham’s code (https://github.com/CongducPham/LowCostLoRaGw/blob/master/Arduino/libraries/SX1272/SX1272.cpp).

There seem to be issues around the EPPROM library and the LowPower Rocket Stream library. I understand that low power library is not for this type of chip, is there any alternative library that I can use?

Thanks so much,

Joel

2

The Lowpower Rocket Stream library is restricted to the SAMD21A18A and the Sodaq Autonomo uses the SAMD21J18A. We have been talking about it here.

The code to run could be: (Don’t forget to put a startup delay in your sketch)

Deepsleep.h:

#include <Arduino.h>
#include <SPI.h> 

void DeepSleep();
void DFlashUltraDeepSleep();
void transmit(uint8_t);
void resetSPIPins();
void resetPin(uint8_t);

Deepsleep.cpp

#include "DeepSleep.h"

void DeepSleep() {
  // Set sleep mode
  SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;

  //Disable USB
  USB->DEVICE.CTRLA.reg &= ~USB_CTRLA_ENABLE;

  DFlashUltraDeepSleep();

  //Enter sleep mode
  __DSB();
  __WFI();
}

void DFlashUltraDeepSleep()
{
  // SPI initialisation
  SPI.begin();

  // Initialise the CS pin for the data flash
  pinMode(SS_DFLASH, OUTPUT);
  digitalWrite(SS_DFLASH, HIGH);

  transmit(0x00); // In case already in sleep, wake
  transmit(0x79); // Now enter sleep

  // SPI end
  SPI.end();

  // Resets the pins used
  resetSPIPins();
}

void transmit(uint8_t val)
{
  SPISettings settings;
  SPI.beginTransaction(settings);
  digitalWrite(SS_DFLASH, LOW);

  SPI.transfer(val);

  digitalWrite(SS_DFLASH, HIGH);
  SPI.endTransaction();

  delayMicroseconds(1000);
}

void resetSPIPins()
{
  resetPin(MISO);
  resetPin(MOSI);
  resetPin(SCK);
  resetPin(SS_DFLASH);
}

void resetPin(uint8_t pin)
{
  PORT->Group[g_APinDescription[pin].ulPort].PINCFG[g_APinDescription[pin].ulPin].reg = (uint8_t)(0);
  PORT->Group[g_APinDescription[pin].ulPort].DIRCLR.reg = (uint32_t)(1 << g_APinDescription[pin].ulPin);
  PORT->Group[g_APinDescription[pin].ulPort].OUTCLR.reg = (uint32_t) (1 << g_APinDescription[pin].ulPin);
}