unable to wakeup from Stop2 mode

[RahulVilasPatil]

I have done below setting for stop2 mode and try to set PC13 as wakeup source. I am unable to find out what is wrong with below code, please guide me how I can use PC13 as wakeup source.

RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
{
Error_Handler();
}

RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_MSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.MSIState = RCC_MSI_ON;
RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_4;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
RCC_OscInitStruct.PLL.PLLMBOOST = RCC_PLLMBOOST_DIV1;
RCC_OscInitStruct.PLL.PLLM = 1;
RCC_OscInitStruct.PLL.PLLN = 80;
RCC_OscInitStruct.PLL.PLLP = 1;
RCC_OscInitStruct.PLL.PLLQ = 1;
RCC_OscInitStruct.PLL.PLLR = 1;
RCC_OscInitStruct.PLL.PLLRGE = RCC_PLLVCIRANGE_0;
RCC_OscInitStruct.PLL.PLLFRACN = 0;

if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}

RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
|RCC_CLOCKTYPE_PCLK3;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB3CLKDivider = RCC_HCLK_DIV1;

if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
{
Error_Handler();
}

setting power and peripheral clocks

    LL_AHB3_GRP1_EnableClock(LL_AHB3_GRP1_PERIPH_PWR);
LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_ALL);
LL_AHB2_GRP1_EnableClockStopSleep(LL_AHB2_GRP1_PERIPH_ALL);

clearing stop flag
LL_PWR_ClearFlag_STOP();

LL_EXTI_InitTypeDef conf = {0};
EXTI_HandleTypeDef hand = {0};
EXTI_ConfigTypeDef extconf = {0};

__enable_irq();

hand.RisingCallback = myRisingCallback;
hand.FallingCallback = myFallingCallback;
hand.Line = EXTI_LINE_13;

extconf.Line = EXTI_LINE_13;
extconf.Mode = EXTI_MODE_INTERRUPT;
extconf.Trigger = EXTI_TRIGGER_RISING_FALLING;
extconf.GPIOSel = EXTI_GPIOC;

            conf.Line_0_31 = LL_EXTI_LINE_9;
	conf.LineCommand = ENABLE;
	conf.Mode = LL_EXTI_MODE_IT_EVENT;
	conf.Trigger = LL_EXTI_TRIGGER_RISING_FALLING;

HAL_EXTI_ClearPending(&hand,EXTI_TRIGGER_RISING);

#if STM32_SYSCLK_SRC_MSI
#define RCC_STOP_WAKEUPCLOCK_SELECTED LL_RCC_STOP_WAKEUPCLOCK_MSI
#else
#define RCC_STOP_WAKEUPCLOCK_SELECTED LL_RCC_STOP_WAKEUPCLOCK_HSI
#endif
LL_RCC_SetClkAfterWakeFromStop(RCC_STOP_WAKEUPCLOCK_SELECTED);

	LL_EXTI_Init(&conf); 
	HAL_EXTI_SetConfigLine(&hand,&extconf);
	HAL_NVIC_ClearPendingIRQ(EXTI13_IRQn);
	HAL_NVIC_EnableIRQ(EXTI13_IRQn);
	
	LL_LPM_EnableDeepSleep();
	LL_LPM_EnableSleepOnExit();
	LL_LPM_EnableEventOnPend();
	LL_PWR_SetPowerMode(LL_PWR_STOP2_MODE);
	LL_PWR_EnablePUPDConfig();
	LL_PWR_EnableGPIOPullDown(LL_PWR_GPIO_PORTC, LL_PWR_GPIO_PIN_13);
	LL_PWR_SetWakeUpPinPolarityHigh(LL_PWR_WAKEUP_PIN2);
	LL_PWR_EnableWakeUpPin(LL_PWR_WAKEUP_PIN2);
	LL_PWR_SetWakeUpPinSignal1Selection(LL_PWR_WAKEUP_PIN2);
	LL_PWR_ClearFlag_WU();

__disable_irq();
__WFI();
HAL_ResumeTick();

Please guide me I don't know what I have missing here

[erwango]

Moving to discussion as this is not a bug but a question.

You are not supposed to use all this code.
All you need to do is to use the wake up pin code:

	LL_PWR_SetWakeUpPinPolarityHigh(LL_PWR_WAKEUP_PIN2);
	LL_PWR_EnableWakeUpPin(LL_PWR_WAKEUP_PIN2);
	LL_PWR_SetWakeUpPinSignal1Selection(LL_PWR_WAKEUP_PIN2);

All the clock and power parts are already handled by Zephyr driver (assuming your target is correctly configured).

[rahulvilaspatil-eaton]

Thanks..., I have use stop2 mode. whatever you have mentioned here is worked with standby perfectly but negative for stop2. yesterday I had gone through some workshop for u5 and there they mention stop2 mode is run with SRD(Smart run mode). I did required setting but still not work.

[erwango]

What is you board configuration (dts)?

[rahulvilaspatil-eaton]

/ {

chosen {
	zephyr,console = &usart1;
	zephyr,shell-uart = &usart1;
};

power-states {
	runtime_idle: runtime-idle {
		compatible = "zephyr,power-state";
		power-state-name = "runtime-idle";
		substate-id = <1>;
		min-residency-us = <110000>;
		exit-latency-us = <100>;
	};
	suspend_to_idle: suspend-to-idle {
		compatible = "zephyr,power-state";
		power-state-name = "suspend-to-idle";
		substate-id = <2>;
		min-residency-us = <120000>;
		exit-latency-us = <100>;
	};
	standby: standby {
		compatible = "zephyr,power-state";
		substate-id = <3>;
		power-state-name = "standby";
		min-residency-us = <130000>;
		exit-latency-us = <100>;
	};
};
aliases {
    
    sw1 = &button1;
};
gpio_keys {
    compatible = "gpio-keys";
    button1: button_1 {
        gpios = <&gpioc 13 ( GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>;
        label = "Button 1";
    };
};

};

&cpu0 {
cpu-power-states = <&runtime_idle &suspend_to_idle &standby>;
};

&clk_lse {
status = "okay";
};
&clk_lsi {
status = "okay";
};

&clk_hsi {
/* Comment out this line to use HSI as clk source */
status = "okay";
};
&clk_msis {
status = "okay";
msi-range = <4>;
msi-pll-mode;
};

&pll1 {
div-m = <1>;
mul-n = <80>;
div-q = <4>;
div-r = <4>;
clocks = <&clk_msis>;
status = "okay";
};

&rcc {
clocks = <&pll1>;
clock-frequency = <DT_FREQ_M(80)>;
ahb-prescaler = <1>;
apb1-prescaler = <1>;
apb2-prescaler = <1>;
apb3-prescaler = <1>;
};

[rahulvilaspatil-eaton]

this is dts file for stm32u575zi_q

[erwango]

stop2 is not configured in your dts. Have a look to :
https://github.com/zephyrproject-rtos/zephyr/blob/main/boards/arm/b_u585i_iot02a/b_u585i_iot02a-common.dtsi