lt8920_test/user/main.cpp

#include "stm32l0xx_hal.h"
#include "stm32l0xx_nucleo.h"


void clock_hsi_init(void);
static void Error_Handler(void);


int main()
{
    HAL_Init();
     
    clock_hsi_init();
    
    SystemCoreClockUpdate();
    
    BSP_LED_Init(LED2);
    
    while (1)
    {
        BSP_LED_Toggle(LED2);
        HAL_Delay(1000);
    }
}


void clock_hsi_init(void)
{
    RCC_ClkInitTypeDef RCC_ClkInitStruct;
    RCC_OscInitTypeDef RCC_OscInitStruct;
    
    __HAL_RCC_PWR_CLK_ENABLE();
    
    __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
    
    /* -2- Enable HSI Oscillator, select it as PLL source and finally activate the PLL */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
    RCC_OscInitStruct.HSIState = RCC_HSI_ON;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
    RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL4;
    RCC_OscInitStruct.PLL.PLLDIV = RCC_PLL_DIV2;
    RCC_OscInitStruct.HSICalibrationValue = 0x10;
    if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    {
        Error_Handler();
    }
    
    /* -3- Select the 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();
    }
}

//
static void Error_Handler(void)
{
    BSP_LED_On(LED2);
  
    while(1) {}
}