Lowpower.sleep equals lowpower.deepsleep?

saucyboythesecond · April 10, 2024, 10:52am

ok so i want to put my MCU a SAM D21 into power saving mode, i wanted to use the lowpower library to do this, but looking at the files inside the library it looks like lowpower.sleep and lowpower.deepsleep are the same.

github.com

arduino-libraries/ArduinoLowPower/blob/0d3b7aa35137751ca9fa1ab9aa34dbe29e8e4a0a/src/samd/ArduinoLowPower.cpp#L38


      
          	PM->SLEEP.reg = 2;
          	__DSB();
          	__WFI();
          }
          
          void ArduinoLowPowerClass::idle(uint32_t millis) {
          	setAlarmIn(millis);
          	idle();
          }
          
          void ArduinoLowPowerClass::sleep() {
          	bool restoreUSBDevice = false;
          	if (SERIAL_PORT_USBVIRTUAL) {
          		USBDevice.standby();
          	} else {
          		USBDevice.detach();
          		restoreUSBDevice = true;
          	}
          	// Disable systick interrupt:  See https://www.avrfreaks.net/forum/samd21-samd21e16b-sporadically-locks-and-does-not-wake-standby-sleep-mode
          	SysTick->CTRL &= ~SysTick_CTRL_TICKINT_Msk;	
          	SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;

looking from line 38 to line 69 it seems like sleep and deepsleep commands do the same. Is there something i'm missing or is this just a quirk that stayed in the code? it is a SAM specific library so i don't think it's for compatibility with te avr-boards.

system · October 7, 2024, 10:52am

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Lowpower.sleep equals lowpower.deepsleep?

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