/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file Examples_LL/PWR/PWR_OptimizedRunMode/Src/main.c
* @author MCD Application Team
* @brief This example describes how to enter or exit Low Power Run mode and update
* the core frequency on the fly through the STM32WLxx PWR LL API.
******************************************************************************
* @attention
*
* Copyright (c) 2020 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
#define USE_LED
typedef enum {
RUN_MODE_DOWN_TO_16MHZ = 0,
RUN_MODE_DOWN_TO_100KHZ = 1,
RUN_MODE_UP_TO_16MHZ = 2,
RUN_MODE_UP_TO_48MHZ = 3
}RunMode_Typedef;
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
RunMode_Typedef RunMode_Next = RUN_MODE_DOWN_TO_16MHZ;
__IO uint8_t ubSequenceRunModes_OnGoing = 1;
#ifdef USE_LED
__IO uint16_t uhLedBlinkSpeed = LED_BLINK_FAST;
#endif
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
/* USER CODE BEGIN PFP */
#ifdef USE_LED
void LED_Blinking(void);
#endif
void EnterRunMode_DownTo16MHz(void);
void EnterRunMode_LowPower_DownTo100KHz(void);
void EnterRunMode_UpTo16MHz(void);
void EnterRunMode_UpTo48MHz(void);
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
/* System interrupt init*/
NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
/* USER CODE BEGIN 2 */
/* Remain in this loop until end of sequences of different run modes */
while(ubSequenceRunModes_OnGoing != 0)
{
#ifdef USE_LED
/* Led blinking until User push-button action */
LED_Blinking();
#endif
}
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
#ifdef USE_LED
/* Led blinking in infinite loop */
LED_Blinking();
#endif
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
LL_FLASH_SetLatency(LL_FLASH_LATENCY_2);
while(LL_FLASH_GetLatency() != LL_FLASH_LATENCY_2)
{
}
LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE1);
LL_RCC_MSI_Enable();
/* Wait till MSI is ready */
while(LL_RCC_MSI_IsReady() != 1)
{
}
LL_RCC_MSI_EnableRangeSelection();
LL_RCC_MSI_SetRange(LL_RCC_MSIRANGE_11);
LL_RCC_MSI_SetCalibTrimming(0);
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_MSI);
/* Wait till System clock is ready */
while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_MSI)
{
}
LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
LL_RCC_SetAHB3Prescaler(LL_RCC_SYSCLK_DIV_1);
LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
LL_Init1msTick(48000000);
/* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
LL_SetSystemCoreClock(48000000);
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
LL_EXTI_InitTypeDef EXTI_InitStruct = {0};
LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
/* GPIO Ports Clock Enable */
LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOB);
LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOA);
/**/
LL_GPIO_ResetOutputPin(GPIOB, LED1_Pin|LED2_Pin|LED3_Pin);
/**/
GPIO_InitStruct.Pin = LED1_Pin|LED2_Pin|LED3_Pin;
GPIO_InitStruct.Mode = LL_GPIO_MODE_OUTPUT;
GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
LL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/**/
LL_SYSCFG_SetEXTISource(LL_SYSCFG_EXTI_PORTA, LL_SYSCFG_EXTI_LINE0);
/**/
EXTI_InitStruct.Line_0_31 = LL_EXTI_LINE_0;
EXTI_InitStruct.Line_32_63 = LL_EXTI_LINE_NONE;
EXTI_InitStruct.LineCommand = ENABLE;
EXTI_InitStruct.Mode = LL_EXTI_MODE_IT;
EXTI_InitStruct.Trigger = LL_EXTI_TRIGGER_FALLING;
LL_EXTI_Init(&EXTI_InitStruct);
/**/
LL_GPIO_SetPinPull(B1_GPIO_Port, B1_Pin, LL_GPIO_PULL_UP);
/**/
LL_GPIO_SetPinMode(B1_GPIO_Port, B1_Pin, LL_GPIO_MODE_INPUT);
/* EXTI interrupt init*/
NVIC_SetPriority(EXTI0_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));
NVIC_EnableIRQ(EXTI0_IRQn);
}
/* USER CODE BEGIN 4 */
#ifdef USE_LED
/**
* @brief Set LED2 to Blinking mode (Shall be call in a Loop).
* @param None
* @retval None
*/
void LED_Blinking(void)
{
/* Toggle IO. This function shall be called in a loop to toggle */
LL_GPIO_TogglePin(LED2_GPIO_Port, LED2_Pin);
LL_mDelay(uhLedBlinkSpeed);
}
#endif
/**
* @brief Function to decrease Frequency at 16MHz in Run Mode.
* @param None
* @retval None
*/
void EnterRunMode_DownTo16MHz(void)
{
/* 1 - Switch clock source on MSI */
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_MSI);
while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_MSI)
{
};
/* Set MSI to 16MHz */
LL_RCC_MSI_SetRange(LL_RCC_MSIRANGE_8);
/* Disable PLL to decrease power consumption */
LL_RCC_PLL_Disable();
while(LL_RCC_PLL_IsReady() != 0)
{
};
/* Disable HSI and wait for deactivation */
LL_RCC_HSI_Disable();
while(LL_RCC_HSI_IsReady() != 0)
{
};
/* Set systick to 1ms in using frequency set to 16MHz */
LL_Init1msTick(16 * 1000000);
/* Update CMSIS variable */
LL_SetSystemCoreClock(16 * 1000000);
/* 2 - Adjust Flash Wait state after decrease Clock Frequency */
LL_FLASH_SetLatency(LL_FLASH_LATENCY_1);
/* 3 - Set Voltage scaling (decrease Vcore) */
LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE2);
}
/**
* @brief Function to decrease Frequency at 100KHZ in Low Power Run Mode.
* @param None
* @retval None
*/
void EnterRunMode_LowPower_DownTo100KHz(void)
{
/* 1 - Set Frequency to 100KHz to activate Low Power Run Mode: 100KHz */
LL_RCC_MSI_SetRange(LL_RCC_MSIRANGE_0);
/* Set systick to 1ms in using frequency set to 100KHz */
LL_Init1msTick(100 * 1000);
/* Update CMSIS variable */
LL_SetSystemCoreClock(100 * 1000);
/* 2 - Adjust Flash Wait state after decrease Clock Frequency */
LL_FLASH_SetLatency(LL_FLASH_LATENCY_0);
/* Voltage Scaling already set to LL_PWR_REGU_VOLTAGE_SCALE2. VCore already decreased */
/* 3 - Activate Low Power Run Mode */
LL_PWR_EnterLowPowerRunMode();
}
/**
* @brief Function to increase Frequency at 16MHz in Run Mode.
* @param None
* @retval None
*/
void EnterRunMode_UpTo16MHz(void)
{
/* 1 - Deactivate Low Power Run Mode to increase Frequency up to 16MHz */
LL_PWR_ExitLowPowerRunMode();
/* Voltage Scaling already set to LL_PWR_REGU_VOLTAGE_SCALE2. VCore already decreased */
/* 2 - Adjust Flash Wait state before increase Clock Frequency */
LL_FLASH_SetLatency(LL_FLASH_LATENCY_1);
/* Wait for flash latency setting effective before increase clock frequency */
while(LL_FLASH_GetLatency() != LL_FLASH_LATENCY_1)
{
};
/* 3 - Set Frequency to 16MHz (MSI) */
LL_RCC_MSI_SetRange(LL_RCC_MSIRANGE_8);
/* Set systick to 1ms in using frequency set to 16MHz */
LL_Init1msTick(16 * 1000000);
/* Update CMSIS variable */
LL_SetSystemCoreClock(16 * 1000000);
}
/**
* @brief Function to increase Frequency at 48MHz in Run Mode.
* @param None
* @retval None
*/
void EnterRunMode_UpTo48MHz(void)
{
/* Set back same system configuration as before sequences of different run modes */
SystemClock_Config();
}
/******************************************************************************/
/* USER IRQ HANDLER TREATMENT */
/******************************************************************************/
/**
* @brief Function to manage BUTTON IRQ Handler
* @param None
* @retval None
*/
void UserButton_Callback(void)
{
if(ubSequenceRunModes_OnGoing != 0)
{
switch(RunMode_Next)
{
case RUN_MODE_DOWN_TO_16MHZ:
{
/* Decrease core frequency and voltage
* Frequency: 48MHz -> 16MHz
* Voltage Scaling Range 2
*/
EnterRunMode_DownTo16MHz();
#ifdef USE_LED
uhLedBlinkSpeed = LED_BLINK_MEDIUM;
#endif
/* Set Next RunMode to execute */
RunMode_Next = RUN_MODE_DOWN_TO_100KHZ;
break;
}
case RUN_MODE_DOWN_TO_100KHZ:
{
/* Decrease core frequency and enter Low Power Run mode
* Frequency: 100KHz
* Voltage Scaling Range 2
* LowPowerRunMode activated
*/
EnterRunMode_LowPower_DownTo100KHz();
#ifdef USE_LED
uhLedBlinkSpeed = LED_BLINK_SLOW;
#endif
/* Set Next RunMode to execute */
RunMode_Next = RUN_MODE_UP_TO_16MHZ;
break;
}
case RUN_MODE_UP_TO_16MHZ:
{
/* Increase core frequency and exit Low Power Run mode
* Frequency: 100KHz -> 16MHz
* Voltage Scaling Range 2
* LowPowerRunMode deactivated
*/
EnterRunMode_UpTo16MHz();
#ifdef USE_LED
uhLedBlinkSpeed = LED_BLINK_MEDIUM;
#endif
/* Set Next RunMode to execute */
RunMode_Next = RUN_MODE_UP_TO_48MHZ;
break;
}
case RUN_MODE_UP_TO_48MHZ:
{
/* Increase core frequency and voltage:
* Frequency: 16MHz -> 48MHz
* Voltage Scaling Range 1
*/
EnterRunMode_UpTo48MHz();
#ifdef USE_LED
uhLedBlinkSpeed = LED_BLINK_FAST;
#endif
/* Exit Test */
ubSequenceRunModes_OnGoing = 0;
break;
}
}
}
else
{
/* End of sequences of different run modes, no action */
}
}
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d", file, line) */
/* Infinite loop */
while (1)
{
}
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */