ATMega2560 - power_usart3_disable' was not declared in this scope

[JM-FRANCE]

Hello

#include "LowPower.h"
void setup()
{
  Serial.begin(115200);
}

void loop()
{
  Serial.println("Bye for 2s");Serial.flush();
  LowPower.powerDown(SLEEP_2S, ADC_OFF, BOD_OFF);
  Serial.println("Hi");Serial.flush();
}

compiles fine with an Arduino Uno in Version 1.6.12 of the IDE.

But moving this simple code to an Arduino Mega 2560 and trying to compile gets me an error:

.../Arduino/libraries/Low-Power/LowPower.cpp: In member function 'void LowPowerClass::idle(period_t, adc_t, timer5_t, timer4_t, timer3_t, timer2_t, timer1_t, timer0_t, spi_t, usart3_t, usart2_t, usart1_t, usart0_t, twi_t)':
.../Arduino/libraries/Low-Power/LowPower.cpp:440:49: error: 'power_usart3_disable' was not declared in this scope
  if (usart3 == USART3_OFF) power_usart3_disable();
                                                 ^

seems this was already reported https://github.com/arduino/Arduino/issues/5286

[vossilius]

+1

[bsoufflet]

+1 also on LowPower version 1.60 and arduino IDE 1.8.1 + Arduino Mega :

LowPower.cpp: In member function 'void LowPowerClass::idle(period_t, adc_t, timer5_t, timer4_t, timer3_t, timer2_t, timer1_t, timer0_t, spi_t, usart3_t, usart2_t, usart1_t, usart0_t, twi_t)': LowPower.cpp:440:49: error: 'power_usart3_disable' was not declared in this scope if (usart3 == USART3_OFF) power_usart3_disable(); ^ LowPower.cpp:475:48: error: 'power_usart3_enable' was not declared in this scope if (usart3 == USART3_OFF) power_usart3_enable(); ^

[Cysign]

Same here. Did anyone fix this?

[Cysign]

By removing line 440 and line 475 I was able to compile properly.

line 440: if (usart3 == USART3_OFF) power_usart3_disable();

line 475: if (usart3 == USART3_OFF) power_usart3_enable();

[AnoxySoftware]

A better solution is to use a preprocessor macro in case this get's added back someday in the power.h of avr:

	#if defined(__AVR_HAVE_PRR_PRUSART3)
	if (usart3 == USART3_OFF)	power_usart3_disable();
	#endif

	#if defined(__AVR_HAVE_PRR_PRUSART3)
	if (usart3 == USART3_OFF)	power_usart3_enable();
	#endif

[rocketscream]

@AnoxySoftware thank you for the suggestion. I'm going to do a clean up on the libraries.

[tvixen]

Arduino Mega 2560 issue still not fixed.

In Arduino Compiler 1.8.5 we get this error: LowPower.cpp:597: error: 'power_usart3_enable' was not declared in this scope if (usart3 == USART3_OFF) power_usart3_enable(); exit status 1 'power_usart3_disable' was not declared in this scope

For your information, its working with Nano, and Uno.

[maxholgasson]

Same here. Still using 1.8.4

[Chilkos]

Unfortunately still not fixed, probably not good to have marked as closed seeing as the readme states this board is supported. Deleting the lines above does let it compile, however these are now at lines 567 & 602