81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
/**
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******************************************************************************
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* @file : bsp_tim.c
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* @author : zsq
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* @version : V1.0
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* @date : 2019-06-27
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* @brief : timer config
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2019 YUNHORN(Shenzhen YunHorn Technology Co., Ltd
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* All rights reserved.
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*
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******************************************************************************
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*/
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#include "bsp_tim.h"
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/**
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* @brief 基本定时器 TIMx,x[6,7]中断优先级配置
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* @param 无
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* @retval 无
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*/
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static void TIMx_NVIC_Configuration(void)
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{
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NVIC_InitTypeDef NVIC_InitStructure;
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NVIC_InitStructure.NVIC_IRQChannel = TIM6_DAC_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPriority = 0x00;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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}
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/**
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* @brief 基本定时器 TIMx,x[6,7]配置
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* @param 无
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* @retval 无
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*/
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static void TIM_Mode_Config(void)
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{
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TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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// 开启TIMx_CLK,x[6,7]
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE);
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/* 累计 TIM_Period个后产生一个更新或者中断*/
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//当定时器从0计数到4999，即为5000次，为一个定时周期
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TIM_TimeBaseStructure.TIM_Period = 24000-1;
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//定时器时钟源TIMxCLK = 2 * PCLK1
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// PCLK1 = HCLK / 4
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// => TIMxCLK=HCLK/2=SystemCoreClock/2=90MHz
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// 设定定时器频率为=TIMxCLK/(TIM_Prescaler+1)=10000Hz
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TIM_TimeBaseStructure.TIM_Prescaler = 20000-1;
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// 初始化定时器TIMx, x[2,3,4,5]
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TIM_TimeBaseInit(TIM6, &TIM_TimeBaseStructure);
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// 清除定时器更新中断标志位
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TIM_ClearFlag(TIM6, TIM_FLAG_Update);
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// 开启定时器更新中断
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TIM_ITConfig(TIM6,TIM_IT_Update,ENABLE);
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// 使能定时器
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TIM_Cmd(TIM6, ENABLE);
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}
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/**
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* @brief 初始化基本定时器定时，1ms产生一次中断
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* @param 无
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* @retval 无
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*/
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void TIMx_Configuration(void)
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{
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TIMx_NVIC_Configuration();
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TIM_Mode_Config();
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}
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