#include "main.h"
#define PeriodValue (uint32_t) (100 - 1)
#define PulseValue (uint32_t) (50 - 1)
LPTIM_HandleTypeDef LptimHandle;
RCC_PeriphCLKInitTypeDef RCC_PeriphCLKInitStruct;
static void SystemClock_Config(void);
static HAL_StatusTypeDef LSE_ClockEnable(void);
static void Error_Handler(void);
static void CPU_CACHE_Enable(void);
int main(void)
{
/* Enable the CPU Cache */
CPU_CACHE_Enable();
HAL_Init();
/* Configure the system clock to 280 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/* User push-button (EXTI15_10) will be used to wakeup the system from Stop mode */
BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);
/* Enable the LSE Clock */
if (LSE_ClockEnable() != HAL_OK)
{
Error_Handler();
}
LptimHandle.Instance = LPTIM1;
LptimHandle.Init.Clock.Source = LPTIM_CLOCKSOURCE_APBCLOCK_LPOSC;
LptimHandle.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV1;
LptimHandle.Init.CounterSource = LPTIM_COUNTERSOURCE_INTERNAL;
LptimHandle.Init.Trigger.Source = LPTIM_TRIGSOURCE_SOFTWARE;
LptimHandle.Init.OutputPolarity = LPTIM_OUTPUTPOLARITY_HIGH;
LptimHandle.Init.UpdateMode = LPTIM_UPDATE_IMMEDIATE;
LptimHandle.Init.Input1Source = LPTIM_INPUT1SOURCE_GPIO;
LptimHandle.Init.Input2Source = LPTIM_INPUT2SOURCE_GPIO;
/* Initialize LPTIM peripheral according to the passed parameters */
if (HAL_LPTIM_Init(&LptimHandle) != HAL_OK)
{
Error_Handler();
}
if (HAL_LPTIM_PWM_Start(&LptimHandle, PeriodValue, PulseValue) != HAL_OK)
{
Error_Handler();
}
HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
if (HAL_LPTIM_PWM_Stop(&LptimHandle) != HAL_OK)
{
Error_Handler();
}
/* Infinite Loop */
while (1)
{
}
}
static void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
/*!< Supply configuration update enable */
HAL_PWREx_ConfigSupply(PWR_DIRECT_SMPS_SUPPLY);
>
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE0);
while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
/* Enable HSE Oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
RCC_OscInitStruct.HSIState = RCC_HSI_OFF;
RCC_OscInitStruct.CSIState = RCC_CSI_OFF;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 4;
RCC_OscInitStruct.PLL.PLLN = 280;
RCC_OscInitStruct.PLL.PLLFRACN = 0;
RCC_OscInitStruct.PLL.PLLP = 2;
RCC_OscInitStruct.PLL.PLLR = 2;
RCC_OscInitStruct.PLL.PLLQ = 2;
RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_1;
if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
/* Initialization Error */
while(1);
}
/* Select PLL as system clock source and configure the 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_DIV1;
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_6) != HAL_OK)
{
/* Initialization Error */
while(1);
}
}
static HAL_StatusTypeDef LSE_ClockEnable(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable LSE clock */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
RCC_OscInitStruct.LSEState = RCC_LSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
return (HAL_RCC_OscConfig(&RCC_OscInitStruct));
}
static void Error_Handler(void)
{
/* Turn LED3 on */
BSP_LED_On(LED3);
while (1)
{
}
}
static void CPU_CACHE_Enable(void)
{
/* Enable I-Cache */
SCB_EnableICache();
/* Enable D-Cache */
SCB_EnableDCache();
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t *file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}