rt-thread/bsp/stm32l072/board/board.c

/*
 * File      : board.c
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2009 RT-Thread Develop Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rt-thread.org/license/LICENSE
 *
 * Change Logs:
 * Date           Author       Notes
 * 2009-01-05     Bernard      first implementation
 * 2013-11-15     bright       add RCC initial and print RCC freq function
 */

#include <rthw.h>
#include <rtthread.h>
#ifdef RT_USING_FINSH
#include <finsh.h>
#endif

#include "board.h"
#include "usart.h"

/**
 * @addtogroup STM32
 */

/*@{*/

/*******************************************************************************
* Function Name  : NVIC_Configuration
* Description    : Configures Vector Table base location.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void NVIC_Configuration(void)
{
//    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
}

/**
 * This RCC initial for system.
 * use HSE clock source
 * HSE = 20MHZ; sysclk = 20MHZ
 * sysclk source is HSE
 * AHB prescaler is 1, HCLK = SYSCKL = SystemCoreClock = 20MHZ
 */
static void RCC_Configuration(void)
{
    RCC_ClkInitTypeDef ClkInit = {0};
    RCC_OscInitTypeDef OscInit = {0};
	
	HAL_RCC_DeInit();
	
    /* Enable HSI Oscillator and Activate PLL with HSI as source */
    OscInit.OscillatorType = RCC_OSCILLATORTYPE_HSI;
    OscInit.HSIState = RCC_HSI_ON;
	OscInit.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
    OscInit.PLL.PLLState = RCC_PLL_ON;
    OscInit.PLL.PLLDIV = RCC_PLLDIV_2;
    OscInit.PLL.PLLMUL = RCC_PLLMUL_4;
    OscInit.PLL.PLLSource = RCC_PLLSOURCE_HSI;
    if (HAL_RCC_OscConfig(&OscInit) != HAL_OK)
    {
        RT_ASSERT(RT_NULL);
    }

    /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
    clocks dividers */
    ClkInit.ClockType = RCC_CLOCKTYPE_SYSCLK |
                        RCC_CLOCKTYPE_HCLK |
                        RCC_CLOCKTYPE_PCLK1 |
                        RCC_CLOCKTYPE_PCLK2;

    ClkInit.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    ClkInit.AHBCLKDivider = RCC_SYSCLK_DIV1;
    ClkInit.APB1CLKDivider = RCC_HCLK_DIV1;
    ClkInit.APB2CLKDivider = RCC_HCLK_DIV1;
    if (HAL_RCC_ClockConfig(&ClkInit, FLASH_LATENCY_1) != HAL_OK)
    {
        RT_ASSERT(RT_NULL);
    }
}

#ifdef PRINT_RCC_FREQ_INFO
/**
 * print RCC freq information
 *
 * for example:
 *
 * SYSCLK_Frequency is 48000000HZ
 * PCLK_Frequency is 48000000HZ
 * HCLK_Frequency is 48000000HZ
 * CECCLK_Frequency is 32786HZ
 * ADCCLK_Frequency is 14000000HZ
 * USART1CLK_Frequency is 48000000HZ
 * I2C1CLK_Frequency is 8000000HZ
 * SystemCoreClock is 48000000HZ
 *
 */
void print_rcc_freq_info(void)
{
    rt_uint32_t clkval;

    clkval = HAL_RCC_GetSysClockFreq();//sysclk
    rt_kprintf("\nSYSCLK_Frequency is %dHZ", clkval);
    clkval = HAL_RCC_GetHCLKFreq();    //Hclk
    rt_kprintf("\nHCLK_Frequency is %dHZ", clkval);
    clkval = HAL_RCC_GetPCLK1Freq();   //pclk1
    rt_kprintf("\nPCLK1_Frequency is %dHZ", clkval);
    clkval = HAL_RCC_GetPCLK2Freq();   //pclk2
    rt_kprintf("\nPCLK2_Frequency is %dHZ", clkval);
}
#endif

/**
 * This is the timer interrupt service routine.
 *
 */
void SysTick_Handler(void)
{
	/* enter interrupt */
	rt_interrupt_enter();

	rt_tick_increase();

	/* leave interrupt */
	rt_interrupt_leave();
}
/**
 * This function will initial STM32 board.
 */
void rt_hw_board_init()
{
	/* NVIC Configuration */
	NVIC_Configuration();

	/* Configure the SysTick */
	RCC_Configuration();
	SysTick_Config(SystemCoreClock / RT_TICK_PER_SECOND);

    /* Call components board initial (use INIT_BOARD_EXPORT()) */
#ifdef RT_USING_COMPONENTS_INIT
    rt_components_board_init();
#endif
#ifdef RT_USING_CONSOLE
	rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif
    /* Print RCC freq info */
#ifdef PRINT_RCC_FREQ_INFO
	print_rcc_freq_info();
#endif
}

long cmd_reset(int argc, char** argv)
{
    HAL_NVIC_SystemReset();
    return 0;
}
FINSH_FUNCTION_EXPORT_ALIAS(cmd_reset, __cmd_reset, Reset Board);

/*@}*/