/**
* @brief Activates the Over-Drive mode.
* @note These macros can be used only for STM32F42xx/STM32F43xx devices.
* This mode allows the CPU and the core logic to operate at a higher frequency
* than the normal mode for a given voltage scaling (scale 1, scale 2 or scale 3).
* @note It is recommended to enter or exit Over-drive mode when the application is not running
* critical tasks and when the system clock source is either HSI or HSE.
* During the Over-drive switch activation, no peripheral clocks should be enabled.
* The peripheral clocks must be enabled once the Over-drive mode is activated.
* @param None
* @retval HAL status
*/
HAL_StatusTypeDef HAL_PWREx_ActivateOverDrive(void)
{
uint32_t timeout = 0;
__PWR_CLK_ENABLE();
/* Enable the Over-drive to extend the clock frequency to 180 Mhz */
__HAL_PWR_OVERDRIVE_ENABLE();
/* Get timeout */
timeout = HAL_GetTick() + PWR_OVERDRIVE_TIMEOUT_VALUE;
while(!__HAL_PWR_GET_FLAG(PWR_FLAG_ODRDY))
{
if(HAL_GetTick() >= timeout)
{
return HAL_TIMEOUT;
}
}
/* Enable the Over-drive switch */
__HAL_PWR_OVERDRIVESWITCHING_ENABLE();
/* Get timeout */
timeout = HAL_GetTick() + PWR_OVERDRIVE_TIMEOUT_VALUE;
while(!__HAL_PWR_GET_FLAG(PWR_FLAG_ODSWRDY))
{
if(HAL_GetTick() >= timeout)
{
return HAL_TIMEOUT;
}
}
return HAL_OK;
}
/**
* @brief Activates the Over-Drive mode.
* @note This mode allows the CPU and the core logic to operate at a higher frequency
* than the normal mode for a given voltage scaling (scale 1, scale 2 or scale 3).
* @note It is recommended to enter or exit Over-drive mode when the application is not running
* critical tasks and when the system clock source is either HSI or HSE.
* During the Over-drive switch activation, no peripheral clocks should be enabled.
* The peripheral clocks must be enabled once the Over-drive mode is activated.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_PWREx_EnableOverDrive(void)
{
uint32_t tickstart = 0;
__HAL_RCC_PWR_CLK_ENABLE();
/* Enable the Over-drive to extend the clock frequency to 216 MHz */
__HAL_PWR_OVERDRIVE_ENABLE();
/* Get tick */
tickstart = HAL_GetTick();
while(!__HAL_PWR_GET_FLAG(PWR_FLAG_ODRDY))
{
if((HAL_GetTick() - tickstart ) > PWR_OVERDRIVE_TIMEOUT_VALUE)
{
return HAL_TIMEOUT;
}
}
/* Enable the Over-drive switch */
__HAL_PWR_OVERDRIVESWITCHING_ENABLE();
/* Get tick */
tickstart = HAL_GetTick();
while(!__HAL_PWR_GET_FLAG(PWR_FLAG_ODSWRDY))
{
if((HAL_GetTick() - tickstart ) > PWR_OVERDRIVE_TIMEOUT_VALUE)
{
return HAL_TIMEOUT;
}
}
return HAL_OK;
}
/**
* @brief Deactivates the Over-Drive mode.
* @note This mode allows the CPU and the core logic to operate at a higher frequency
* than the normal mode for a given voltage scaling (scale 1, scale 2 or scale 3).
* @note It is recommended to enter or exit Over-drive mode when the application is not running
* critical tasks and when the system clock source is either HSI or HSE.
* During the Over-drive switch activation, no peripheral clocks should be enabled.
* The peripheral clocks must be enabled once the Over-drive mode is activated.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_PWREx_DisableOverDrive(void)
{
uint32_t tickstart = 0;
__HAL_RCC_PWR_CLK_ENABLE();
/* Disable the Over-drive switch */
__HAL_PWR_OVERDRIVESWITCHING_DISABLE();
/* Get tick */
tickstart = HAL_GetTick();
while(__HAL_PWR_GET_FLAG(PWR_FLAG_ODSWRDY)) {
if((HAL_GetTick() - tickstart ) > PWR_OVERDRIVE_TIMEOUT_VALUE) {
return HAL_TIMEOUT;
}
}
/* Disable the Over-drive */
__HAL_PWR_OVERDRIVE_DISABLE();
/* Get tick */
tickstart = HAL_GetTick();
while(__HAL_PWR_GET_FLAG(PWR_FLAG_ODRDY)) {
if((HAL_GetTick() - tickstart ) > PWR_OVERDRIVE_TIMEOUT_VALUE) {
return HAL_TIMEOUT;
}
}
return HAL_OK;
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F0xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Low Level Initialization
*/
HAL_Init();
/* Configure LED1, LED2 */
BSP_LED_Init(LED1);
BSP_LED_Init(LED2);
/* Configure the system clock to 48 MHz */
SystemClock_Config();
/* Enable Power Clock */
__PWR_CLK_ENABLE();
/* Check if the system was resumed from StandBy mode */
if (__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
{
/* Wait that user release the Tamper push-button */
BSP_PB_Init(BUTTON_TAMPER, BUTTON_MODE_GPIO);
while(BSP_PB_GetState(BUTTON_TAMPER) == GPIO_PIN_RESET){}
}
/* Initialize the Tamper push-button to generate external interrupts */
BSP_PB_Init(BUTTON_TAMPER, BUTTON_MODE_EXTI);
/* RTC configuration */
RTC_Config();
/* Turn on LED1 */
BSP_LED_On(LED1);
/*The Following Wakeup sequence is highly recommended prior to each Standby mode entry
mainly when using more than one wakeup source this is to not miss any wakeup event.
- Disable all used wakeup sources,
- Clear all related wakeup flags,
- Re-enable all used wakeup sources,
- Enter the Standby mode.
*/
/*Disable all used wakeup sources: Pin1(PA.0)*/
HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN1);
/*Clear all related wakeup flags*/
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
/*Re-enable all used wakeup sources: Pin1(PA.0)*/
HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1);
while (1)
{
}
}
/**
* @brief Enters in Under-Drive STOP mode.
*
* @note This mode can be selected only when the Under-Drive is already active
*
* @note This mode is enabled only with STOP low power mode.
* In this mode, the 1.2V domain is preserved in reduced leakage mode. This
* mode is only available when the main regulator or the low power regulator
* is in low voltage mode
*
* @note If the Under-drive mode was enabled, it is automatically disabled after
* exiting Stop mode.
* When the voltage regulator operates in Under-drive mode, an additional
* startup delay is induced when waking up from Stop mode.
*
* @note In Stop mode, all I/O pins keep the same state as in Run mode.
*
* @note When exiting Stop mode by issuing an interrupt or a wakeup event,
* the HSI RC oscillator is selected as system clock.
*
* @note When the voltage regulator operates in low power mode, an additional
* startup delay is incurred when waking up from Stop mode.
* By keeping the internal regulator ON during Stop mode, the consumption
* is higher although the startup time is reduced.
*
* @param Regulator: specifies the regulator state in STOP mode.
* This parameter can be one of the following values:
* @arg PWR_MAINREGULATOR_UNDERDRIVE_ON: Main Regulator in under-drive mode
* and Flash memory in power-down when the device is in Stop under-drive mode
* @arg PWR_LOWPOWERREGULATOR_UNDERDRIVE_ON: Low Power Regulator in under-drive mode
* and Flash memory in power-down when the device is in Stop under-drive mode
* @param STOPEntry: specifies if STOP mode in entered with WFI or WFE instruction.
* This parameter can be one of the following values:
* @arg PWR_SLEEPENTRY_WFI: enter STOP mode with WFI instruction
* @arg PWR_SLEEPENTRY_WFE: enter STOP mode with WFE instruction
* @retval None
*/
HAL_StatusTypeDef HAL_PWREx_EnterUnderDriveSTOPMode(uint32_t Regulator, uint8_t STOPEntry)
{
uint32_t tempreg = 0;
uint32_t tickstart = 0;
/* Check the parameters */
assert_param(IS_PWR_REGULATOR_UNDERDRIVE(Regulator));
assert_param(IS_PWR_STOP_ENTRY(STOPEntry));
/* Enable Power ctrl clock */
__HAL_RCC_PWR_CLK_ENABLE();
/* Enable the Under-drive Mode ---------------------------------------------*/
/* Clear Under-drive flag */
__HAL_PWR_CLEAR_ODRUDR_FLAG();
/* Enable the Under-drive */
__HAL_PWR_UNDERDRIVE_ENABLE();
/* Get tick */
tickstart = HAL_GetTick();
/* Wait for UnderDrive mode is ready */
while(__HAL_PWR_GET_FLAG(PWR_FLAG_UDRDY))
{
if((HAL_GetTick() - tickstart ) > PWR_UDERDRIVE_TIMEOUT_VALUE)
{
return HAL_TIMEOUT;
}
}
/* Select the regulator state in STOP mode ---------------------------------*/
tempreg = PWR->CR1;
/* Clear PDDS, LPDS, MRLUDS and LPLUDS bits */
tempreg &= (uint32_t)~(PWR_CR1_PDDS | PWR_CR1_LPDS | PWR_CR1_LPUDS | PWR_CR1_MRUDS);
/* Set LPDS, MRLUDS and LPLUDS bits according to PWR_Regulator value */
tempreg |= Regulator;
/* Store the new value */
PWR->CR1 = tempreg;
/* Set SLEEPDEEP bit of Cortex System Control Register */
SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
/* Select STOP mode entry --------------------------------------------------*/
if(STOPEntry == PWR_SLEEPENTRY_WFI)
{
/* Request Wait For Interrupt */
__WFI();
}
else
{
/* Request Wait For Event */
__WFE();
}
/* Reset SLEEPDEEP bit of Cortex System Control Register */
SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP_Msk);
return HAL_OK;
}
/**
* @brief Configures the main internal regulator output voltage.
* @param VoltageScaling: specifies the regulator output voltage to achieve
* a tradeoff between performance and power consumption.
* This parameter can be one of the following values:
* @arg PWR_REGULATOR_VOLTAGE_SCALE1: Regulator voltage output range 1 mode,
* the maximum value of fHCLK is 168 MHz. It can be extended to
* 180 MHz by activating the over-drive mode.
* @arg PWR_REGULATOR_VOLTAGE_SCALE2: Regulator voltage output range 2 mode,
* the maximum value of fHCLK is 144 MHz. It can be extended to,
* 168 MHz by activating the over-drive mode.
* @arg PWR_REGULATOR_VOLTAGE_SCALE3: Regulator voltage output range 3 mode,
* the maximum value of fHCLK is 120 MHz.
* @note To update the system clock frequency(SYSCLK):
* - Set the HSI or HSE as system clock frequency using the HAL_RCC_ClockConfig().
* - Call the HAL_RCC_OscConfig() to configure the PLL.
* - Call HAL_PWREx_ConfigVoltageScaling() API to adjust the voltage scale.
* - Set the new system clock frequency using the HAL_RCC_ClockConfig().
* @note The scale can be modified only when the HSI or HSE clock source is selected
* as system clock source, otherwise the API returns HAL_ERROR.
* @note When the PLL is OFF, the voltage scale 3 is automatically selected and the VOS bits
* value in the PWR_CR1 register are not taken in account.
* @note This API forces the PLL state ON to allow the possibility to configure the voltage scale 1 or 2.
* @note The new voltage scale is active only when the PLL is ON.
* @retval HAL Status
*/
HAL_StatusTypeDef HAL_PWREx_ControlVoltageScaling(uint32_t VoltageScaling)
{
uint32_t tickstart = 0U;
assert_param(IS_PWR_VOLTAGE_SCALING_RANGE(VoltageScaling));
/* Enable PWR RCC Clock Peripheral */
__HAL_RCC_PWR_CLK_ENABLE();
/* Check if the PLL is used as system clock or not */
if(__HAL_RCC_GET_SYSCLK_SOURCE() != RCC_CFGR_SWS_PLL)
{
/* Disable the main PLL */
__HAL_RCC_PLL_DISABLE();
/* Get Start Tick */
tickstart = HAL_GetTick();
/* Wait till PLL is disabled */
while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) != RESET)
{
if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE)
{
return HAL_TIMEOUT;
}
}
/* Set Range */
__HAL_PWR_VOLTAGESCALING_CONFIG(VoltageScaling);
/* Enable the main PLL */
__HAL_RCC_PLL_ENABLE();
/* Get Start Tick */
tickstart = HAL_GetTick();
/* Wait till PLL is ready */
while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) == RESET)
{
if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE)
{
return HAL_TIMEOUT;
}
}
/* Get Start Tick */
tickstart = HAL_GetTick();
while((__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY) == RESET))
{
if((HAL_GetTick() - tickstart ) > PWR_VOSRDY_TIMEOUT_VALUE)
{
return HAL_TIMEOUT;
}
}
}
else
{
return HAL_ERROR;
}
return HAL_OK;
}
int main(void) {
char msg[20];
HAL_Init();
Nucleo_BSP_Init();
/* Before we can access to every register of the PWR peripheral we must enable it */
__HAL_RCC_PWR_CLK_ENABLE();
while (1) {
if(__HAL_PWR_GET_FLAG(PWR_FLAG_SB)) {
/* If standby flag set in PWR->CSR, then the reset is generated from
* the exit of the standby mode */
sprintf(msg, "RESET after STANDBY mode\r\n");
HAL_UART_Transmit(&huart2, (uint8_t*)msg, strlen(msg), HAL_MAX_DELAY);
/* We have to explicitly clear the flag */
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU|PWR_FLAG_SB);
}
sprintf(msg, "MCU in run mode\r\n");
HAL_UART_Transmit(&huart2, (uint8_t*)msg, strlen(msg), HAL_MAX_DELAY);
while(HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_13) == GPIO_PIN_SET) {
HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);
HAL_Delay(100);
}
HAL_Delay(200);
sprintf(msg, "Entering in SLEEP mode\r\n");
HAL_UART_Transmit(&huart2, (uint8_t*)msg, strlen(msg), HAL_MAX_DELAY);
SleepMode();
sprintf(msg, "Exiting from SLEEP mode\r\n");
HAL_UART_Transmit(&huart2, (uint8_t*)msg, strlen(msg), HAL_MAX_DELAY);
while(HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_13) == GPIO_PIN_SET);
HAL_Delay(200);
sprintf(msg, "Entering in STOP mode\r\n");
HAL_UART_Transmit(&huart2, (uint8_t*)msg, strlen(msg), HAL_MAX_DELAY);
StopMode();
sprintf(msg, "Exiting from STOP mode\r\n");
HAL_UART_Transmit(&huart2, (uint8_t*)msg, strlen(msg), HAL_MAX_DELAY);
while(HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_13) == GPIO_PIN_SET);
HAL_Delay(200);
sprintf(msg, "Entering in STANDBY mode\r\n");
HAL_UART_Transmit(&huart2, (uint8_t*)msg, strlen(msg), HAL_MAX_DELAY);
StandbyMode();
while(1); //Never arrives here, since MCU is reset when exiting from STANDBY
}
}
/**
* @brief Configures the RTC.
* @param None
* @retval None
*/
static void RTC_Config(void)
{
/* Enable Power Clock*/
__PWR_CLK_ENABLE();
/* Allow Access to RTC Backup domaine */
HAL_PWR_EnableBkUpAccess();
RtcHandle.Instance= RTC;
/* Check if the system was resumed from StandBy mode */
if (__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
{
/* Clear StandBy flag */
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
/* Disable the write protection for RTC registers */
__HAL_RTC_WRITEPROTECTION_DISABLE(&RtcHandle);
/* Wait for RTC APB registers synchronisation (needed after start-up from Reset)*/
if (HAL_RTC_WaitForSynchro(&RtcHandle) != HAL_OK)
{
while(1);
}
/* Enable the write protection for RTC registers */
__HAL_RTC_WRITEPROTECTION_ENABLE(&RtcHandle);
/* No need to configure the RTC as the RTC config(clock source, enable,
prescaler,...) are kept after wake-up from STANDBY */
}
else
{
/* Reset Backup Domaine */
__HAL_RCC_BACKUPRESET_FORCE();
__HAL_RCC_BACKUPRESET_RELEASE();
/* Set the RTC time base to 1s */
/* Configure RTC prescaler and RTC data registers as follows:
- Hour Format = Format 24
- Asynch Prediv = Value according to source clock
- Synch Prediv = Value according to source clock
- OutPut = Output Disable
- OutPutPolarity = High Polarity
- OutPutType = Open Drain */
RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
RtcHandle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV;
RtcHandle.Init.SynchPrediv = RTC_SYNCH_PREDIV;
RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
if(HAL_RTC_Init(&RtcHandle) != HAL_OK)
{
/* Initialization Error */
while(1);
}
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F103xB HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Configure the system clock to 64 MHz */
SystemClock_Config();
/* Configure the system Power */
SystemPower_Config();
/* Check and handle if the system was resumed from Standby mode */
if (__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
{
/* Clear Standby flag */
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
}
/* Insert 5 seconds delay */
HAL_Delay(5000);
/* The Following Wakeup sequence is highly recommended prior to each Standby mode entry
mainly when using more than one wakeup source this is to not miss any wakeup event.
- Disable all used wakeup sources,
- Clear all related wakeup flags,
- Re-enable all used wakeup sources,
- Enter the Standby mode.
*/
/* Disable all used wakeup sources: PWR_WAKEUP_PIN1 */
HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN1);
/* Clear all related wakeup flags*/
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
/* Enable WakeUp Pin PWR_WAKEUP_PIN1 connected to PA.00 */
HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1);
/* Enter the Standby mode */
HAL_PWR_EnterSTANDBYMode();
/* This code will never be reached! */
while (1)
{
}
}
/**
* @brief Deactivates the Over-Drive mode.
* @note These macros can be used only for STM32F42xx/STM32F43xx devices.
* This mode allows the CPU and the core logic to operate at a higher frequency
* than the normal mode for a given voltage scaling (scale 1, scale 2 or scale 3).
* @note It is recommended to enter or exit Over-drive mode when the application is not running
* critical tasks and when the system clock source is either HSI or HSE.
* During the Over-drive switch activation, no peripheral clocks should be enabled.
* The peripheral clocks must be enabled once the Over-drive mode is activated.
* @param None
* @retval HAL status
*/
HAL_StatusTypeDef HAL_PWREx_DeactivateOverDrive(void)
{
uint32_t timeout = 0;
__PWR_CLK_ENABLE();
/* Disable the Over-drive switch */
__HAL_PWR_OVERDRIVESWITCHING_DISABLE();
/* Get timeout */
timeout = HAL_GetTick() + PWR_OVERDRIVE_TIMEOUT_VALUE;
while(__HAL_PWR_GET_FLAG(PWR_FLAG_ODSWRDY))
{
if(HAL_GetTick() >= timeout)
{
return HAL_TIMEOUT;
}
}
/* Disable the Over-drive */
__HAL_PWR_OVERDRIVE_DISABLE();
/* Get timeout */
timeout = HAL_GetTick() + PWR_OVERDRIVE_TIMEOUT_VALUE;
while(__HAL_PWR_GET_FLAG(PWR_FLAG_ODRDY))
{
if(HAL_GetTick() >= timeout)
{
return HAL_TIMEOUT;
}
}
return HAL_OK;
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* Enable the CPU Cache */
CPU_CACHE_Enable();
/* STM32F7xx HAL library initialization:
- Configure the Flash ART accelerator on ITCM interface
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Configure the system clock to 216 MHz */
SystemClock_Config();
/* Configure LED1, LED3 */
BSP_LED_Init(LED1);
BSP_LED_Init(LED3);
/* Enable Power Clock */
__HAL_RCC_PWR_CLK_ENABLE();
/* Check if the system was resumed from StandBy mode */
if (__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
{
/* Wait that user release the Tamper push-button */
BSP_PB_Init(BUTTON_TAMPER, BUTTON_MODE_GPIO);
while(BSP_PB_GetState(BUTTON_TAMPER) == GPIO_PIN_SET){}
}
/* Initialize the Tamper push-button to generate external interrupts */
BSP_PB_Init(BUTTON_TAMPER, BUTTON_MODE_EXTI);
/* RTC configuration */
RTC_Config();
/* Turn on LED1 */
BSP_LED_On(LED1);
while (1)
{
}
}
uint8_t SetSysClock_PLL_HSI(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/*!< Supply configuration update enable */
HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
/* The voltage scaling allows optimizing the power consumption when the device is
clocked below the maximum system frequency, to update the voltage scaling value
regarding system frequency refer to product datasheet. */
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
while (!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
// Enable HSI oscillator and activate PLL with HSI as source
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_CSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.CSIState = RCC_CSI_OFF;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = 8;
RCC_OscInitStruct.PLL.PLLN = 100;
RCC_OscInitStruct.PLL.PLLP = 2;
RCC_OscInitStruct.PLL.PLLQ = 2;
RCC_OscInitStruct.PLL.PLLR = 2;
RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure bus clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_D1PCLK1 | RCC_CLOCKTYPE_PCLK1 | \
RCC_CLOCKTYPE_PCLK2 | RCC_CLOCKTYPE_D3PCLK1);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) {
return 0; // FAIL
}
return 1; // OK
}
void LBF_SysClkCfg(void)
{
// Derived from Cube MX Code Generator and EVAL152D USB MS example
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
// Enable HSE Oscillator and Activate PLL with HSE as source
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL12;
RCC_OscInitStruct.PLL.PLLDIV = RCC_PLL_DIV3;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
// Error_Handler();
}
// Set Voltage scale1 as MCU will run at 32MHz
__PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
// Poll VOSF bit of in PWR_CSR. Wait until it is reset to 0
// This indicates regulator has reached required voltage level
while (__HAL_PWR_GET_FLAG(PWR_FLAG_VOS) != RESET) {};
// Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers
// RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK |
RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
{
// Error_Handler();
}
__SYSCFG_CLK_ENABLE();
// System Configuration Clock
// The system configuration controller is mainly used to remap the memory accessible in the
// code area, and manage the external interrupt line connection to the GPIOs.
}
/**
* @brief Disables the Backup Regulator.
* @param None
* @retval None
*/
HAL_StatusTypeDef HAL_PWREx_DisableBkUpReg(void)
{
uint32_t timeout = 0;
*(__IO uint32_t *) CSR_BRE_BB = (uint32_t) DISABLE;
/* Get timeout */
timeout = HAL_GetTick() + PWR_BKPREG_TIMEOUT_VALUE;
/* Wait till Backup regulator ready flag is set */
while (__HAL_PWR_GET_FLAG(PWR_FLAG_BRR) != RESET)
{
if (HAL_GetTick() >= timeout)
{
return HAL_TIMEOUT;
}
}
return HAL_OK;
}
/**
* @brief Disables the Backup Regulator.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_PWREx_DisableBkUpReg(void)
{
uint32_t tickstart = 0;
/* Disable Backup regulator */
PWR->CSR1 &= (uint32_t)~((uint32_t)PWR_CSR1_BRE);
/* Get tick */
tickstart = HAL_GetTick();
/* Wait till Backup regulator ready flag is set */
while(__HAL_PWR_GET_FLAG(PWR_FLAG_BRR) != RESET) {
if((HAL_GetTick() - tickstart ) > PWR_BKPREG_TIMEOUT_VALUE) {
return HAL_TIMEOUT;
}
}
return HAL_OK;
}
void RtcRecoverMcuStatus( void )
{
// PWR_FLAG_WU indicates the Alarm has waken-up the MCU
if( __HAL_PWR_GET_FLAG( PWR_FLAG_WU ) != RESET )
{
__HAL_PWR_CLEAR_FLAG( PWR_FLAG_WU );
}
else
{
NonScheduledWakeUp = true;
}
// check the clk source and set to full speed if we are coming from sleep mode
if( ( __HAL_RCC_GET_SYSCLK_SOURCE( ) == RCC_SYSCLKSOURCE_STATUS_HSI ) ||
( __HAL_RCC_GET_SYSCLK_SOURCE( ) == RCC_SYSCLKSOURCE_STATUS_MSI ) )
{
BoardInitMcu( );
}
}
uint8_t SetSysClock_PLL_HSI(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* The voltage scaling allows optimizing the power consumption when the device is
clocked below the maximum system frequency, to update the voltage scaling value
regarding system frequency refer to product datasheet. */
__PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/* Enable HSI oscillator and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
// SYSCLK = 32 MHz (16 MHz *6 /3)
// USBCLK = 48 MHz (16 MHz *6 /2)
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6;
RCC_OscInitStruct.PLL.PLLDIV = RCC_PLL_DIV3;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Poll VOSF bit of in PWR_CSR. Wait until it is reset to 0 */
while (__HAL_PWR_GET_FLAG(PWR_FLAG_VOS) != RESET) {};
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 32 MHz
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 32 MHz
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 32 MHz
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 32 MHz
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) {
return 0; // FAIL
}
/* Output clock on MCO1 pin(PA8) for debugging purpose */
//HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_1); // 16 MHz
return 1; // OK
}
/**
* @brief Enables the Backup Regulator.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_PWREx_EnableBkUpReg(void)
{
uint32_t tickstart = 0U;
*(__IO uint32_t *) CSR_BRE_BB = (uint32_t)ENABLE;
/* Get tick */
tickstart = HAL_GetTick();
/* Wait till Backup regulator ready flag is set */
while(__HAL_PWR_GET_FLAG(PWR_FLAG_BRR) == RESET)
{
if((HAL_GetTick() - tickstart ) > PWR_BKPREG_TIMEOUT_VALUE)
{
return HAL_TIMEOUT;
}
}
return HAL_OK;
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure LED1, LED2 */
BSP_LED_Init(LED1);
BSP_LED_Init(LED2);
/* Configure the system clock to 168 MHz */
SystemClock_Config();
/* Enable Power Clock */
__HAL_RCC_PWR_CLK_ENABLE();
/* Check and Clear the Wakeup flag */
if (__HAL_PWR_GET_FLAG(PWR_FLAG_WU) != RESET)
{
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
}
/* Initialize the Key push-button to generate external interrupts */
BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_EXTI);
/* RTC configuration */
RTC_Config();
/* Turn on LED1 */
BSP_LED_On(LED1);
/* Enable WakeUp Pin PWR_WAKEUP_PIN1 connected to PA.00 */
HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1);
while (1)
{
}
}
void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
/* Enable HSE Oscillator and Activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6;
RCC_OscInitStruct.PLL.PLLDIV = RCC_PLL_DIV3;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/* Set Voltage scale1 as MCU will run at 32MHz */
__PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/* Poll VOSF bit of in PWR_CSR. Wait until it is reset to 0 */
while (__HAL_PWR_GET_FLAG(PWR_FLAG_VOS) != RESET) {};
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief Disables the Backup Regulator.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_PWREx_DisableBkUpReg(void)
{
uint32_t tickstart = 0;
/* Disable Backup regulator */
PWR->CSR1 &= (uint32_t)~((uint32_t)PWR_CSR1_BRE);
/* Workaround for the following hardware bug: */
/* Id 19: PWR : No STANDBY wake-up when Back-up RAM enabled (ref. Errata Sheet p23) */
PWR->CSR1 |= PWR_CSR1_EIWUP;
/* Get tick */
tickstart = HAL_GetTick();
/* Wait till Backup regulator ready flag is set */
while(__HAL_PWR_GET_FLAG(PWR_FLAG_BRR) != RESET)
{
if((HAL_GetTick() - tickstart ) > PWR_BKPREG_TIMEOUT_VALUE)
{
return HAL_TIMEOUT;
}
}
return HAL_OK;
}
/**
* @brief Configures the main internal regulator output voltage.
* @param VoltageScaling: specifies the regulator output voltage to achieve
* a tradeoff between performance and power consumption.
* This parameter can be one of the following values:
* @arg PWR_REGULATOR_VOLTAGE_SCALE1: Regulator voltage output range 1 mode,
* the maximum value of fHCLK = 168 MHz.
* @arg PWR_REGULATOR_VOLTAGE_SCALE2: Regulator voltage output range 2 mode,
* the maximum value of fHCLK = 144 MHz.
* @note When moving from Range 1 to Range 2, the system frequency must be decreased to
* a value below 144 MHz before calling HAL_PWREx_ConfigVoltageScaling() API.
* When moving from Range 2 to Range 1, the system frequency can be increased to
* a value up to 168 MHz after calling HAL_PWREx_ConfigVoltageScaling() API.
* @retval HAL Status
*/
HAL_StatusTypeDef HAL_PWREx_ControlVoltageScaling(uint32_t VoltageScaling)
{
uint32_t tickstart = 0U;
assert_param(IS_PWR_VOLTAGE_SCALING_RANGE(VoltageScaling));
/* Enable PWR RCC Clock Peripheral */
__HAL_RCC_PWR_CLK_ENABLE();
/* Set Range */
__HAL_PWR_VOLTAGESCALING_CONFIG(VoltageScaling);
/* Get Start Tick*/
tickstart = HAL_GetTick();
while((__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY) == RESET))
{
if((HAL_GetTick() - tickstart ) > PWR_VOSRDY_TIMEOUT_VALUE)
{
return HAL_TIMEOUT;
}
}
return HAL_OK;
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 100 MHz */
SystemClock_Config();
/* Configure LED2 */
BSP_LED_Init(LED2);
/* Enable Power Clock */
__HAL_RCC_PWR_CLK_ENABLE();
/* Check and handle if the system was resumed from Standby mode */
if(__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
{
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
/* Infinite loop */
while (1)
{
/* Toggle LED2 */
BSP_LED_Toggle(LED2);
/* Insert a 100ms delay */
HAL_Delay(100);
}
}
/* Configure USER Button */
BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_GPIO);
/* Wait until USER button is pressed to enter the Low Power mode */
while(BSP_PB_GetState(BUTTON_KEY) != RESET)
{
/* Toggle LED2 */
BSP_LED_Toggle(LED2);
/* Insert 1s Delay */
HAL_Delay(1000);
}
/* Loop while USER Button is maintained pressed */
while(BSP_PB_GetState(BUTTON_KEY) == RESET)
{
}
#if defined (SLEEP_MODE)
/* Sleep Mode Entry
- System Running at PLL (168MHz)
- Flash 5 wait state
- Instruction and Data caches ON
- Prefetch ON
- Code running from Internal FLASH
- All peripherals disabled.
- Wake-up using EXTI Line (User Button)
*/
SleepMode_Measure();
#elif defined (STOP_MODE)
/* STOP Mode Entry
- RTC Clocked by LSI
- Regulator in LP mode
- HSI, HSE OFF and LSI OFF if not used as RTC Clock source
- No IWDG
- FLASH in deep power down mode
- Automatic Wake-up using RTC clocked by LSI (after ~20s)
*/
StopMode_Measure();
#elif defined (STANDBY_MODE)
/* STANDBY Mode Entry
- Backup SRAM and RTC OFF
- IWDG and LSI OFF
- Wake-up using WakeUp Pin (PA.00)
*/
StandbyMode_Measure();
#elif defined (STANDBY_RTC_MODE)
/* STANDBY Mode with RTC on LSI Entry
- RTC Clocked by LSI
- IWDG OFF and LSI OFF if not used as RTC Clock source
- Backup SRAM OFF
- Automatic Wake-up using RTC clocked by LSI (after ~20s)
*/
StandbyRTCMode_Measure();
#elif defined (STANDBY_RTC_BKPSRAM_MODE)
/* STANDBY Mode with RTC on LSI Entry
- RTC Clocked by LSI
- Backup SRAM ON
- IWDG OFF
- Automatic Wake-up using RTC clocked by LSI (after ~20s)
*/
StandbyRTCBKPSRAMMode_Measure();
#endif
if(uwCounter != 0)
{
BSP_LED_Init(LED2);
}
/* Infinite loop */
while (1)
{
/* Toggle LED2 */
BSP_LED_Toggle(LED2);
/* Inserted Delay */
HAL_Delay(100);
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch and Buffer caches
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Low Level Initialization
*/
HAL_Init();
/* Configure LED3 and LED4 */
BSP_LED_Init(LED3);
BSP_LED_Init(LED4);
/* Configure the system clock to 180 MHz */
SystemClock_Config();
/* Enable Power Clock */
__HAL_RCC_PWR_CLK_ENABLE();
/* Check and handle if the system was resumed from StandBy mode */
if(__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
{
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
/* Turn LED4 On */
BSP_LED_On(LED4);
}
/* Configure Key Button */
BSP_PB_Init(BUTTON_USER, BUTTON_MODE_GPIO);
/* Wait until Key button is pressed to enter the Low Power mode */
while(BSP_PB_GetState(BUTTON_USER) != SET)
{
}
/* Loop while Key button is maintained pressed */
while(BSP_PB_GetState(BUTTON_USER) == SET)
{
}
/* Infinite loop */
while (1)
{
#if defined (SLEEP_MODE)
/* Sleep Mode Entry
- System Running at PLL (180MHz)
- Flash 5 wait state
- Instruction and Data caches ON
- Prefetch ON
- Code running from Internal FLASH
- All peripherals disabled.
- Wakeup using EXTI Line (Key Button PC.13)
*/
SleepMode_Measure();
#elif defined (STOP_MODE)
/* STOP Mode Entry
- RTC Clocked by LSE/LSI
- Regulator in LP mode
- HSI, HSE OFF and LSI OFF if not used as RTC Clock source
- No IWDG
- FLASH in deep power down mode
- Automatic Wakeup using RTC clocked by LSE/LSI (after ~20s)
*/
StopMode_Measure();
#elif defined (STANDBY_MODE)
/* STANDBY Mode Entry
- Backup SRAM and RTC OFF
- IWDG and LSI OFF
- Wakeup using WakeUp Pin (PA.00)
*/
StandbyMode_Measure();
#elif defined (STANDBY_RTC_MODE)
/* STANDBY Mode with RTC on LSE/LSI Entry
- RTC Clocked by LSE or LSI
- IWDG OFF and LSI OFF if not used as RTC Clock source
- Backup SRAM OFF
- Automatic Wakeup using RTC clocked by LSE/LSI (after ~20s)
*/
StandbyRTCMode_Measure();
#elif defined (STANDBY_RTC_BKPSRAM_MODE)
/* STANDBY Mode with RTC on LSE/LSI Entry
- RTC Clocked by LSE/LSI
- Backup SRAM ON
- IWDG OFF
- Automatic Wakeup using RTC clocked by LSE/LSI (after ~20s)
*/
StandbyRTCBKPSRAMMode_Measure();
#endif
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F0xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Low Level Initialization
*/
HAL_Init();
/* Configure LED */
BSP_LED_Init(LED2);
/* Configure the system clock to 48 MHz */
SystemClock_Config();
/* Enable Power Clock */
__HAL_RCC_PWR_CLK_ENABLE();
/* Check and handle if the system was resumed from StandBy mode */
if (__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
{
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
/* Configure User push-button */
BSP_PB_Init(BUTTON_USER, BUTTON_MODE_GPIO);
/* Turn on the LED2 and keep
it on for 2 sec. to indicate
exit from stand-by mode */
BSP_LED_On(LED2);
while(BSP_PB_GetState(BUTTON_USER) == GPIO_PIN_RESET){}
HAL_Delay(2000);
uwStandByOutFlag = 1;
}
/* Infinite loop */
while(1)
{
/* Configure User push-button as external interrupt generator */
BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);
UserButtonStatus = 0;
/* Wait until User push-button is pressed to enter the Low Power mode.
In the meantime, LED2 is blinks */
while (UserButtonStatus == 0)
{
/* Toggle LED2 */
BSP_LED_Toggle(LED2);
HAL_Delay(100);
}
/* Make sure LED2 is turned off to
reduce low power mode consumption */
BSP_LED_Off(LED2);
#if defined (SLEEP_MODE)
/* Sleep Mode Entry
- System Running at PLL (48 MHz)
- Flash 2 wait state
- Instruction and Data caches ON
- Prefetch ON
- Code running from Internal FLASH
- All peripherals disabled.
- Wakeup using EXTI Line (User push-button PC.13)
*/
SleepMode_Measure();
#elif defined (STOP_RTC_MODE)
/* STOP Mode Entry
- RTC Clocked by LSI or LSE
- Regulator in LP mode
- HSI, HSE OFF and LSI OFF if not used as RTC Clock source
- No IWDG
- Automatic Wakeup using RTC clocked by LSI (after ~20s)
- Wakeup using EXTI Line (User push-button PC.13)
*/
StopRTCMode_Measure();
#elif defined (STANDBY_MODE)
/* STANDBY Mode Entry
- RTC OFF
- IWDG and LSI OFF
- Wakeup using WakeUp Pin PWR_WAKEUP_PIN2 connected to PC.13
*/
StandbyMode_Measure();
#elif defined (STANDBY_RTC_MODE)
/* STANDBY Mode with RTC on LSE/LSI Entry
- RTC Clocked by LSE or LSI
- IWDG OFF and LSI OFF if not used as RTC Clock source
- Automatic Wakeup using RTC clocked by LSE/LSI (after ~20s)
*/
StandbyRTCMode_Measure();
#endif
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F0xx HAL library initialization:
- Configure the Flash prefetch
- Configure the Systick to generate an interrupt each 1 msec
- Low Level Initialization
*/
HAL_Init();
/* Configure LED */
BSP_LED_Init(LED2);
/* Configure the system clock to 48 MHz */
SystemClock_Config();
/* Enable Power Clock */
__PWR_CLK_ENABLE();
/* Check and handle if the system was resumed from StandBy mode */
if (__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
{
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
/* Turn on the LED2 and keep
it on for 2 sec. to indicate
exit from stand-by mode */
BSP_LED_On(LED2);
HAL_Delay(2000);
}
/* Infinite loop */
while(1)
{
/* Configure User push-button */
BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);
UserButtonStatus = 0;
/* Wait until User push-button is pressed to enter the Low Power mode.
In the meantime, LED2 is blinking */
while (UserButtonStatus == 0)
{
/* Toggle LED2 */
BSP_LED_Toggle(LED2);
HAL_Delay(100);
}
/* Loop while User push-button is maintained pressed */
while(BSP_PB_GetState(BUTTON_USER) != SET){}
/* Make sure LED2 is turned off to
reduce low power mode consumption */
BSP_LED_Off(LED2);
#if defined (SLEEP_MODE)
/* Sleep Mode Entry
- System Running at PLL (48 MHz)
- Flash 1 wait state
- Instruction and Data caches ON
- Prefetch ON
- Code running from Internal FLASH
- All peripherals disabled.
- Wakeup using EXTI Line (User push-button PC.13)
*/
SleepMode_Measure();
#elif defined (STOP_MODE)
/* STOP Mode Entry
- RTC Clocked by LSI
- Regulator in LP mode
- HSI, HSE OFF and LSI OFF if not used as RTC Clock source
- No IWDG
- Wakeup using EXTI Line (User push-button PC.13)
*/
StopMode_Measure();
#elif defined (STOP_RTC_MODE)
/* STOP Mode Entry
- RTC Clocked by LSI
- Regulator in LP mode
- HSI, HSE OFF and LSI OFF if not used as RTC Clock source
- No IWDG
- Automatic Wakeup using RTC clocked by LSI (after ~20s)
*/
StopRTCMode_Measure();
#elif defined (STANDBY_MODE)
/* STANDBY Mode Entry
- RTC OFF
- IWDG and LSI OFF
- Wakeup using WakeUp Pin (wire Vdd to PA.00)
*/
StandbyMode_Measure();
#elif defined (STANDBY_RTC_MODE)
/* STANDBY Mode with RTC on LSI Entry
- RTC Clocked by LSI
- IWDG OFF and LSI OFF if not used as RTC Clock source
- Automatic Wakeup using RTC clocked by LSI (after ~20s)
*/
StandbyRTCMode_Measure();
#endif /* SLEEP_MODE */
}
}
int main(void)
{
/* USER CODE BEGIN 1 */
trace_printf("Hello\n");
/* USER CODE END 1 */
/* MCU Configuration----------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
/* USER CODE BEGIN 2 */
BSP_LED_Init(LED6);
BSP_LED_Init(LED5);
/* Checks if reset was because of wakeup from standby */
if (__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
{
/* Clear Standby and wakeup flag */
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB | PWR_FLAG_WU);
BSP_LED_On(LED5);
/* Reset was from wakeup from standy */
}
else
{
BSP_LED_Off(LED5);
}
BSP_UART_Init(115200);
uprintf("First LED is blinking in normal mode...\n\r");
uprintf("Press '1' to enter system in standby mode.\n\r");
uprintf("Wait 5s, RTC will wake-up system...\n\r");
// BSP_RTC_Init();
while(ugetche(NONE_BLOCKING) !='1')
{
BSP_LED_Toggle(LED6);
HAL_Delay(500);
}
uprintf("\n\nEnter Deep PowerDown mode...\n\r");
BSP_StandbyMode_PB();
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
BSP_LED_Toggle(LED6);
HAL_Delay(500);
}
/* USER CODE END 3 */
}
/**
* @brief Configures the RTC.
* @param None
* @retval None
*/
static void RTC_Config(void)
{
RTCHandle.Instance = RTC;
/* Set the RTC time base to 1s */
/* Configure RTC prescaler and RTC data registers as follow:
- Hour Format = Format 24
- Asynch Prediv = Value according to source clock
- Synch Prediv = Value according to source clock
- OutPut = Output Disable
- OutPutPolarity = High Polarity
- OutPutType = Open Drain */
RTCHandle.Init.HourFormat = RTC_HOURFORMAT_24;
RTCHandle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV;
RTCHandle.Init.SynchPrediv = RTC_SYNCH_PREDIV;
RTCHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
RTCHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
RTCHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
if(HAL_RTC_Init(&RTCHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Check and Clear the Wakeup flag */
if(__HAL_PWR_GET_FLAG(PWR_FLAG_WU) != RESET)
{
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
}
/* Check if the system was resumed from StandBy mode */
if(__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
{
/* Clear StandBy flag */
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
/* Disable the write protection for RTC registers */
__HAL_RTC_WRITEPROTECTION_DISABLE(&RTCHandle);
/* Wait for RTC APB registers synchronisation (needed after start-up from Reset)*/
if(HAL_RTC_WaitForSynchro(&RTCHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Enable the write protection for RTC registers */
__HAL_RTC_WRITEPROTECTION_ENABLE(&RTCHandle);
/* No need to configure the RTC as the RTC config(clock source, enable,
prescaler,...) are kept after wake-up from STANDBY */
}
else
{
/* Set the time to 01h 00mn 00s AM */
RTC_TimeStructure.TimeFormat = RTC_HOURFORMAT12_AM;
RTC_TimeStructure.Hours = 0x01;
RTC_TimeStructure.Minutes = 0x00;
RTC_TimeStructure.Seconds = 0x00;
if(HAL_RTC_SetTime(&RTCHandle, &RTC_TimeStructure, RTC_FORMAT_BCD) == HAL_ERROR)
{
/* Initialization Error */
Error_Handler();
}
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F3xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Configure Green, Red and Orange LEDs */
BSP_LED_Init(LED_GREEN);
BSP_LED_Init(LED_RED);
BSP_LED_Init(LED_ORANGE);
/* Configure the system clock to 72 Mhz */
SystemClock_Config();
/* Enable Power Clock */
__PWR_CLK_ENABLE();
/* Check and handle if the system was resumed from StandBy mode */
if(__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
{
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
/* Turn on the Orange LED */
BSP_LED_On(LED_ORANGE);
uwStandByOutFlag = 1;
}
/* infinite loop */
while(1)
{
/* Configure User Button */
BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);
UserButtonStatus = 0;
/* Wait until User button is pressed to enter the Low Power mode.
In the meantime, LED_GREEN is blinking */
while(UserButtonStatus == 0)
{
BSP_LED_Toggle(LED_GREEN);
HAL_Delay(100);
/* if exiting from stand-by mode,
keep LED_ORANGE ON for about 3 sec. */
if (uwStandByOutFlag > 0)
{
uwStandByOutFlag++;
if (uwStandByOutFlag == 30)
{
BSP_LED_Off(LED_ORANGE);
uwStandByOutFlag = 0;
}
}
/* if exiting from stop mode thru RTC alarm
interrupt, keep LED_ORANGE ON for about 3 sec. */
if (uwWakeUpIntFlag > 0)
{
uwWakeUpIntFlag++;
if (uwWakeUpIntFlag == 30)
{
BSP_LED_Off(LED_BLUE);
uwWakeUpIntFlag = 0;
}
}
}
/* Loop while Key button is maintained pressed */
while(BSP_PB_GetState(BUTTON_USER) != SET) {}
/* Make sure LED_GREEN is turned off to
reduce low power mode consumption */
BSP_LED_Off(LED_GREEN);
#if defined (SLEEP_MODE)
/* Sleep Mode Entry
- System Running at PLL (72 MHz)
- Flash 2 wait state
- Instruction and Data caches ON
- Prefetch ON
- Code running from Internal FLASH
- All peripherals disabled.
- Wakeup using EXTI Line (User Button PA.00)
*/
SleepMode_Measure();
#elif defined (STOP_MODE)
/* STOP Mode Entry
- RTC Clocked by LSI
- Regulator in LP mode
- HSI, HSE OFF and LSI OFF if not used as RTC Clock source
- No IWDG
- Wakeup using EXTI Line (User Button PA.00)
*/
StopMode_Measure();
#elif defined (STOP_RTC_MODE)
/* STOP Mode Entry
- RTC Clocked by LSI
- Regulator in LP mode
- HSI, HSE OFF and LSI OFF if not used as RTC Clock source
- No IWDG
- Automatic Wakeup using RTC clocked by LSI (after ~20s)
*/
StopRTCMode_Measure();
#elif defined (STANDBY_MODE)
/* STANDBY Mode Entry
- Backup SRAM and RTC OFF
- IWDG and LSI OFF
- Wakeup using WakeUp Pin (User Button PA.00)
*/
StandbyMode_Measure();
#elif defined (STANDBY_RTC_MODE)
/* STANDBY Mode with RTC on LSI Entry
- RTC Clocked by LSI
- IWDG OFF and LSI OFF if not used as RTC Clock source
- Automatic Wakeup using RTC clocked by LSI (after ~20s)
*/
StandbyRTCMode_Measure();
#endif
}
}
uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
__HAL_RCC_SYSCFG_CLK_ENABLE(); // Mandatory for I/O Compensation Cell
MODIFY_REG(PWR->CR3, PWR_CR3_SCUEN, 0);
/*!< Supply configuration update enable */
// HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
/* The voltage scaling allows optimizing the power consumption when the device is
clocked below the maximum system frequency, to update the voltage scaling value
regarding system frequency refer to product datasheet. */
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
while (!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
// NEEDED ???
/* Select CSI as system clock source to allow modification of the PLL configuration */
//RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;
//RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_CSI;
//if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) {
// return 0; // FAIL
//}
/* Enable HSE Oscillator and activate PLL with HSE as source */
//RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI48;
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI48;
if (bypass) {
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
} else {
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
}
RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 4; // 2 MHz
RCC_OscInitStruct.PLL.PLLN = 400; // 800 MHz
RCC_OscInitStruct.PLL.PLLP = 2; // PLLCLK = SYSCLK = 400 MHz
RCC_OscInitStruct.PLL.PLLQ = 80; // PLL1Q used for FDCAN = 10 MHz
RCC_OscInitStruct.PLL.PLLR = 2;
RCC_OscInitStruct.PLL.PLLFRACN = 0;
RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_1;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Select PLL as system clock source and configure bus clocks dividers */
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK |
RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2 |
RCC_CLOCKTYPE_D1PCLK1 | RCC_CLOCKTYPE_D3PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
return 0; // FAIL
}
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USART3 | RCC_PERIPHCLK_USB;
PeriphClkInitStruct.Usart234578ClockSelection = RCC_USART234578CLKSOURCE_D2PCLK1;
PeriphClkInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) {
return 0; // FAIL
}
/* Disable CSI Oscillator */
//RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_CSI;
//RCC_OscInitStruct.CSIState = RCC_CSI_OFF;
//RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
//if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
// return 0;
//}
// NEEDED ???
/* Enables the I/O Compensation Cell */
// __HAL_RCC_CSI_ENABLE(); // Mandatory for I/O Compensation Cell
// HAL_EnableCompensationCell();
return 1; // OK
}
