186 lines
6.0 KiB
C
186 lines
6.0 KiB
C
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/**
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****************************************************************************************************
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* @file bsp_delay.c
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* @author
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* @version V1.0
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* @date 2024-02-10
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* @brief 系统调用接口
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****************************************************************************************************
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*/
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#include "drv_sys.h"
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/**
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* @brief 设置中断向量表偏移地址
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* @param baseaddr: 基址
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* @param offset: 偏移量
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* @retval 无
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*/
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void sys_nvic_set_vector_table(uint32_t baseaddr, uint32_t offset)
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{
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/* 设置NVIC的向量表偏移寄存器,VTOR低9位保留,即[8:0]保留 */
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SCB->VTOR = baseaddr | (offset & (uint32_t)0xFFFFFE00);
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}
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/**
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* @brief 执行: WFI指令(执行完该指令进入低功耗状态, 等待中断唤醒)
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* @param 无
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* @retval 无
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*/
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void sys_wfi_set(void)
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{
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__ASM volatile("wfi");
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}
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/**
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* @brief 关闭所有中断(但是不包括fault和NMI中断)
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* @param 无
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* @retval 无
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*/
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void sys_intx_disable(void)
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{
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__ASM volatile("cpsid i");
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}
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/**
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* @brief 开启所有中断
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* @param 无
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* @retval 无
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*/
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void sys_intx_enable(void)
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{
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__ASM volatile("cpsie i");
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}
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/**
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* @brief 设置栈顶地址
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* @note 左侧若出现红X, 属于MDK误报, 实际是没问题的
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* @param addr: 栈顶地址
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* @retval 无
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*/
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void sys_msr_msp(uint32_t addr)
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{
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__set_MSP(addr); /* 设置栈顶地址 */
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}
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/**
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* @brief 进入待机模式
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* @param 无
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* @retval 无
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*/
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void sys_standby(void)
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{
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__HAL_RCC_PWR_CLK_ENABLE(); /* 使能电源时钟 */
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SET_BIT(PWR->CR, PWR_CR_PDDS); /* 进入待机模式 */
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}
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/**
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* @brief 系统软复位
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* @param 无
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* @retval 无
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*/
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void sys_soft_reset(void)
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{
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NVIC_SystemReset();
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}
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/**
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* @brief 时钟设置函数
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* @param plln: 主PLL倍频系数(PLL倍频), 取值范围: 64~432.
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* @param pllm: 主PLL和音频PLL预分频系数(进PLL之前的分频), 取值范围: 2~63.
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* @param pllp: 主PLL的p分频系数(PLL之后的分频), 分频后作为系统时钟, 取值范围: 2, 4, 6, 8.(仅限这4个值)
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* @param pllq: 主PLL的q分频系数(PLL之后的分频), 取值范围: 2~15.
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* @note
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*
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* Fvco: VCO频率
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* Fsys: 系统时钟频率, 也是主PLL的p分频输出时钟频率
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* Fq: 主PLL的q分频输出时钟频率
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* Fs: 主PLL输入时钟频率, 可以是HSI, HSE等.
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* Fvco = Fs * (plln / pllm);
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* Fsys = Fvco / pllp = Fs * (plln / (pllm * pllp));
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* Fq = Fvco / pllq = Fs * (plln / (pllm * pllq));
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*
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* 外部晶振为 8M的时候, 推荐值: plln = 336, pllm = 8, pllp = 2, pllq = 7.
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* 得到:Fvco = 8 * (336 / 8) = 336Mhz
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* Fsys = pll_p_ck = 336 / 2 = 168Mhz
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* Fq = pll_q_ck = 336 / 7 = 48Mhz
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*
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* F407默认需要配置的频率如下:
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* CPU频率(HCLK) = pll_p_ck = 168Mhz
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* AHB1/2/3(rcc_hclk1/2/3) = 168Mhz
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* APB1(rcc_pclk1) = pll_p_ck / 4 = 42Mhz
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* APB1(rcc_pclk2) = pll_p_ck / 2 = 84Mhz
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*
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* @retval 错误代码: 0, 成功; 1, 错误;
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*/
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uint8_t sys_stm32_clock_init(uint32_t plln, uint32_t pllm, uint32_t pllp, uint32_t pllq)
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{
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HAL_StatusTypeDef ret = HAL_OK;
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RCC_OscInitTypeDef rcc_osc_init = {0};
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RCC_ClkInitTypeDef rcc_clk_init = {0};
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__HAL_RCC_PWR_CLK_ENABLE(); /* 使能PWR时钟 */
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); /* 设置调压器输出电压级别，以便在器件未以最大频率工作 */
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/* 使能HSE，并选择HSE作为PLL时钟源，配置PLL1，开启USB时钟 */
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rcc_osc_init.OscillatorType = RCC_OSCILLATORTYPE_HSE; /* 时钟源为HSE */
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rcc_osc_init.HSEState = RCC_HSE_ON; /* 打开HSE */
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rcc_osc_init.PLL.PLLState = RCC_PLL_ON; /* 打开PLL */
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rcc_osc_init.PLL.PLLSource = RCC_PLLSOURCE_HSE; /* PLL时钟源选择HSE */
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rcc_osc_init.PLL.PLLN = plln;
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rcc_osc_init.PLL.PLLM = pllm;
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rcc_osc_init.PLL.PLLP = pllp;
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rcc_osc_init.PLL.PLLQ = pllq;
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ret = HAL_RCC_OscConfig(&rcc_osc_init); /* 初始化RCC */
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if(ret != HAL_OK)
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{
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return 1; /* 时钟初始化失败，可以在这里加入自己的处理 */
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}
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/* 选中PLL作为系统时钟源并且配置HCLK,PCLK1和PCLK2 */
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rcc_clk_init.ClockType = ( RCC_CLOCKTYPE_SYSCLK \
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| RCC_CLOCKTYPE_HCLK \
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| RCC_CLOCKTYPE_PCLK1 \
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| RCC_CLOCKTYPE_PCLK2);
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rcc_clk_init.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; /* 设置系统时钟时钟源为PLL */
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rcc_clk_init.AHBCLKDivider = RCC_SYSCLK_DIV1; /* AHB分频系数为1 */
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rcc_clk_init.APB1CLKDivider = RCC_HCLK_DIV4; /* APB1分频系数为4 */
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rcc_clk_init.APB2CLKDivider = RCC_HCLK_DIV2; /* APB2分频系数为2 */
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ret = HAL_RCC_ClockConfig(&rcc_clk_init, FLASH_LATENCY_5); /* 同时设置FLASH延时周期为5WS，也就是6个CPU周期 */
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if(ret != HAL_OK)
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{
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return 1; /* 时钟初始化失败 */
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}
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/* STM32F405x/407x/415x/417x Z版本的器件支持预取功能 */
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if (HAL_GetREVID() == 0x1001)
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{
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__HAL_FLASH_PREFETCH_BUFFER_ENABLE(); /* 使能flash预取 */
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}
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return 0;
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief 当编译提示出错的时候此函数用来报告错误的文件和所在行
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* @param file：指向源文件
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* line：指向在文件中的行数
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* @retval 无
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*/
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void assert_failed(uint8_t* file, uint32_t line)
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{
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while (1)
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{
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}
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}
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#endif
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