标签：性能 reset config 更新 com lock int def bsp
设置等待时间，到达后则执行指定操作的硬件。
具有基本的定时功能，也有PWM输出（灯光控制、电机的转速）、脉冲捕获功能（红外捕捉）。
2个高级控制定时器、10个通用定时器和2个基本定时器
高级控制定时器（TIM1和TIM8）
具有16位定时器功能，也具有PWM输出高级控制功能
通用定时器（TIM2到TIM5）
具有16位定时功能，也具有PWM输出控制功能
通用定时器（TIM9到TIM14）
具有16位定时功能，也具有PWM输出控制功能
基本定时器（TIM6和TIM7）
具有16位定时功能
/* TIM3 clock enable ，定时器3时钟使能*/ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); /* Time base configuration ，定时器基本配置*/ TIM_TimeBaseStructure.TIM_Period = (10000/1000)-1; //定时时间的设置[非常重要],中断频率为1000Hz，也就是定时时间为1ms TIM_TimeBaseStructure.TIM_Prescaler = 8400-1; //预分频值 TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //时钟分频，也称之为二次分频,当前是1分频，说白了不分频，不降低频率 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数的方法 TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //初始化
涉及部分寄存器参考如下
/* TIM Interrupts enable,使能定时器3更新中断事件，也代表说定时已经到达的事件 */ TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE); /* TIM3 enable counter，使能定时器3工作 */ TIM_Cmd(TIM3, ENABLE);
void TIM3_IRQHandler(void) { static uint32_t cnt=0; //是否已经有更新中断事件 if (TIM_GetITStatus(TIM3, TIM_IT_Update) == SET) { //添加用户代码 cnt++; if(cnt>=500) { cnt =0; PFout(9)^=1; } //清空标志位，告诉CPU我已经完成中断处理 TIM_ClearITPendingBit(TIM3, TIM_IT_Update); } }
TIM3
#include <stdio.h> #include "stm32f4xx.h" #include "sys.h" GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; void tim3_init(void) { /* TIM3 clock enable ，定时器3时钟使能*/ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); /* Enable the TIM3 gloabal Interrupt ，使能定时器3全局中断*/ NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); /* Time base configuration ，定时器基本配置*/ TIM_TimeBaseStructure.TIM_Period = (10000/1000)-1; //定时时间的设置[非常重要],中断频率为1000Hz，也就是定时时间为1ms TIM_TimeBaseStructure.TIM_Prescaler = 8400-1; //预分频值 TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //时钟分频，也称之为二次分频,当前是1分频，说白了不分频，不降低频率 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数的方法 TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //初始化 /* TIM Interrupts enable,使能定时器3更新中断事件，也代表说定时已经到达的事件 */ TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE); /* TIM3 enable counter，使能定时器3工作 */ TIM_Cmd(TIM3, ENABLE); } int main(void) { RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF, ENABLE); /* 配置PF9引脚为输出模式 */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //第9根引脚 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; //设置输出模式 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽模式，增加驱动电流 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //设置IO的速度为100MHz，频率越高性能越好，频率越低，功耗越低 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; //不需要上拉电阻 GPIO_Init(GPIOF, &GPIO_InitStructure); PFout(9)=1; //定时器3初始化 tim3_init(); while(1) { } } void TIM3_IRQHandler(void) { static uint32_t cnt=0; //是否已经有更新中断事件 if (TIM_GetITStatus(TIM3, TIM_IT_Update) == SET) { //添加用户代码 cnt++; if(cnt>=500) { cnt =0; PFout(9)^=1; } //清空标志位，告诉CPU我已经完成中断处理 TIM_ClearITPendingBit(TIM3, TIM_IT_Update); } }
tim1238_irq
#include "stm32f4xx.h" #include "stdio.h" #include "bitband.h" GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; void tim1_init(void) { RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_TIM10_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); //定时时间为100ms 168000000/16800=10000Hz TIM_TimeBaseStructure.TIM_Period = (10000/10)-1; TIM_TimeBaseStructure.TIM_Prescaler = 16800-1; TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE); TIM_Cmd(TIM1, ENABLE); } void tim2_init(void) { RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); //定时时间为200ms 84000000/84000=10000Hz TIM_TimeBaseStructure.TIM_Period = (10000/5)-1; TIM_TimeBaseStructure.TIM_Prescaler = 8400-1; TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE); TIM_Cmd(TIM2, ENABLE); } void tim3_init(void) { RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); //定时时间为500ms 84000000/84000=10000Hz TIM_TimeBaseStructure.TIM_Period = (10000/2)-1; TIM_TimeBaseStructure.TIM_Prescaler = 8400-1; TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE); TIM_Cmd(TIM3, ENABLE); } void tim8_init(void) { RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8, ENABLE); NVIC_InitStructure.NVIC_IRQChannel = TIM8_UP_TIM13_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); //定时时间为2秒 168000000/168000=10000Hz TIM_TimeBaseStructure.TIM_Period = (10000*2)-1; TIM_TimeBaseStructure.TIM_Prescaler = 16800-1; TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM8, &TIM_TimeBaseStructure); TIM_ITConfig(TIM8, TIM_IT_Update, ENABLE); TIM_Cmd(TIM8, ENABLE); } int main(void) { RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF | RCC_AHB1Periph_GPIOE, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(GPIOF, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13|GPIO_Pin_14; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(GPIOE, &GPIO_InitStructure); PFout(9) = 1; PFout(10) = 1; PEout(13) = 1; PEout(14) = 1; tim1_init(); tim2_init(); tim3_init(); tim8_init(); while(1) { } } void TIM1_UP_TIM10_IRQHandler(void) { if (TIM_GetITStatus(TIM1, TIM_IT_Update) != RESET) { PFout(9) ^= 1; TIM_ClearITPendingBit(TIM1, TIM_IT_Update); } } void TIM2_IRQHandler(void) { if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) { PFout(10) ^= 1; TIM_ClearITPendingBit(TIM2, TIM_IT_Update); } } void TIM3_IRQHandler(void) { if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) { PEout(13) ^= 1; TIM_ClearITPendingBit(TIM3, TIM_IT_Update); } } void TIM8_UP_TIM13_IRQHandler(void) { if (TIM_GetITStatus(TIM8, TIM_IT_Update) != RESET) { PEout(14) ^= 1; TIM_ClearITPendingBit(TIM8, TIM_IT_Update); } }
标签：性能 reset config 更新 com lock int def bsp
原文地址：https://www.cnblogs.com/xiangtingshen/p/10961427.html
