SCD_SCD/SCDV3_BL/drivers/drv_clk.c

/*
 * Copyright (c) 2006-2019, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2019-10-26     ChenYong     first version
 * 2020-01-08     xiangxistu   add HSI configuration
 */


#define DBG_TAG "board"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>

#include <board.h>
#include <rtthread.h>
#include <stm32f4xx.h>
#include "drv_common.h"

void system_clock_config(int target_freq_mhz)
{
    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
    RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0}; // ← 新增

    __HAL_RCC_PWR_CLK_ENABLE();
    __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);

    // 配置 HSE + LSE
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_LSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.LSEState = RCC_LSE_ON;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLM = 4;
    RCC_OscInitStruct.PLL.PLLN = 84;
    RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
    RCC_OscInitStruct.PLL.PLLQ = 4;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    {
        Error_Handler();
    }

    // 配置系统时钟
    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
                                | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
    {
        Error_Handler();
    }

    // ★★★ 关键修复：显式选择 RTC 时钟源为 LSE ★★★
    PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
    PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
    {
        Error_Handler();
    }
}
//int clock_information(void)
//{
//    rt_kprintf("System Clock information\n");
//    rt_kprintf("SYSCLK_Frequency = %d\n", HAL_RCC_GetSysClockFreq());
//    rt_kprintf("HCLK_Frequency   = %d\n", HAL_RCC_GetHCLKFreq());
//    rt_kprintf("PCLK1_Frequency  = %d\n", HAL_RCC_GetPCLK1Freq());
//    rt_kprintf("PCLK2_Frequency  = %d\n", HAL_RCC_GetPCLK2Freq());
//
//    return RT_EOK;
//}
//INIT_BOARD_EXPORT(clock_information);

void clk_init(char *clk_source, int source_freq, int target_freq)
{
    system_clock_config(target_freq);
}