【经验分享】STM32 通用定时器的几种配置方式

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STMCU小助手发布时间：2022-1-27 00:18

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文章简介:	STM32 通用定时器的几种配置方式

//------------------------------------------------------------------------------
// 1、普通定时使用
#include"stm32f10x.h"
#include"time.h"
static Time_NVIC_Config( void )
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_SetVectorTable( NVIC_VectTab_FLASH, 0x0000 );
NVIC_PriorityGroupConfig( NVIC_PriorityGroup_1 );
NVIC_InitStructure.NVIC_IRQChannel = TIMx_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init( &NVIC_InitStructure );
}
static void Time_Config( void )
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIMx, ENABLE );
//TIM_DeInit(TIM2);
TIM_TimeBaseInitStructure.TIM_Prescaler = ( 10000 - 1 ); //时钟分频系数
TIM_TimeBaseInitStructure.TIM_Period = ( 7200 - 1 ); //自动重装寄存器
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseInitStructure.TIM_ClockDivision = 0; //时钟分割,这里不涉及
#if 0
TIM_TimeBaseInitStructure.TIM_RepetitionCounter;
//This parameter is valid only for TIM1 and TIM8
#endif
TIM_TimeBaseInit( TIMx, &TIM_TimeBaseInitStructure ); //配置参数
TIM_ClearITPendingBit( TIMx, TIM_IT_Update ); //清除中断标示位
TIM_ITConfig( TIMx, TIM_IT_Update, ENABLE ); //中断配置
TIM_Cmd( TIMx, ENABLE ); //启动定时器
}
void Time_Init( void )
{
Time_Config( ); //定时器配置
Time_NVIC_Config( ); //嵌套中断向量初始化
}
//------------------------------------------------------------------------------
// 2、PWM输出
#include"stm32f10x.h"
#include"time.h"
#if 1
static Time_NVIC_Config( void )
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_SetVectorTable( NVIC_VectTab_FLASH, 0x0000 );
NVIC_PriorityGroupConfig( NVIC_PriorityGroup_1 );
NVIC_InitStructure.NVIC_IRQChannel = TIMx_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init( &NVIC_InitStructure );
}
#endif
void Time_OUT_PWM_GPIO_Config( void )
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( TIMx_OUT_GPIO_RCC, ENABLE );
GPIO_InitStructure.GPIO_Pin = TIMx_OUT_Pin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推免式输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( TIMx_OUT_Port, &GPIO_InitStructure );
}
static void Time_OUT_PWM_Config( void )
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIMx, ENABLE ); //开启时钟
TIM_DeInit( TIM2 );
TIM_TimeBaseInitStructure.TIM_Prescaler = ( 100 - 1 ); //时钟分频系数
TIM_TimeBaseInitStructure.TIM_Period = ( 1000 - 1 ); //自动重装寄存器 PWM频率:72M/100/1000=720Hz
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseInitStructure.TIM_ClockDivision = 0; //时钟分频,这里不涉及
#ifdef Time1
TIM_TimeBaseInitStructure.TIM_RepetitionCounter; //This parameter is valid only for TIM1 and TIM8
#endif
TIM_TimeBaseInit( TIMx, &TIM_TimeBaseInitStructure ); //配置参数
TIM_ClearITPendingBit( TIMx, TIM_IT_Update ); //清除中断标示位
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //PWM1模式 OCx电平根据ARR与CCRx比较结果发生反转
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //输出使能通道1
#ifdef Time1
TIM_OCInitStructure.TIM_OutputNState =;
#endif
TIM_OCInitStructure.TIM_Pulse = CCR1_VAL; //占空比800/1000
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //计数器值小于CCR值时输出高电平
#ifdef Time1
TIM_OCInitStructure.TIM_OCNPolarity =;
TIM_OCInitStructure.TIM_OCIdleState =;
TIM_OCInitStructure.TIM_OCNIdleState =;
#endif
TIM_OC1Init( TIMx, &TIM_OCInitStructure );
TIM_OC1PreloadConfig( TIMx, TIM_OCPreload_Enable ); //使能CCR1预装载
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //输出使能通道2
TIM_OCInitStructure.TIM_Pulse = CCR2_VAL;
TIM_OC2Init( TIMx, &TIM_OCInitStructure );
TIM_OC2PreloadConfig( TIMx, TIM_OCPreload_Enable );
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //输出使能通道3
TIM_OCInitStructure.TIM_Pulse = CCR3_VAL;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC3Init( TIMx, &TIM_OCInitStructure );
TIM_OC3PreloadConfig( TIMx, TIM_OCPreload_Enable );
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //输出使能通道4
TIM_OCInitStructure.TIM_Pulse = CCR4_VAL;
TIM_OC4Init( TIMx, &TIM_OCInitStructure );
TIM_OC4PreloadConfig( TIMx, TIM_OCPreload_Enable );
TIM_ARRPreloadConfig( TIMx, ENABLE ); //开启ARR预装载
TIM_Cmd( TIMx, ENABLE ); //启动定时器
}
void Time_OUT_PWM_Init( void )
{
Time_OUT_PWM_GPIO_Config( );
Time_OUT_PWM_Config( ); //定时器配置
}
//------------------------------------------------------------------------------
// 3、输出比较模式
#include"stm32f10x.h"
#include"time.h"
static Time_NVIC_Config( void )
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_SetVectorTable( NVIC_VectTab_FLASH, 0x0000 );
NVIC_PriorityGroupConfig( NVIC_PriorityGroup_1 );
NVIC_InitStructure.NVIC_IRQChannel = TIMx_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init( &NVIC_InitStructure );
}
static void Time_OUT_PWM_GPIO_Config( void )
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( TIMx_OUT_GPIO_RCC, ENABLE );
GPIO_InitStructure.GPIO_Pin = TIMx_OUT_Pin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推免式输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( TIMx_OUT_Port, &GPIO_InitStructure );
}
static void Time_GPIO_Config( void )
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOD, ENABLE );
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //通用推免式输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( GPIOD, &GPIO_InitStructure );
}
static void Time_OUT_PWM_Config( void )
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIMx, ENABLE ); //开启时钟
TIM_DeInit( TIM2 );
TIM_TimeBaseInitStructure.TIM_Prescaler = ( 100 - 1 ); //时钟分频系数
TIM_TimeBaseInitStructure.TIM_Period = ( 1000 - 1 ); //自动重装寄存器 PWM频率:72M/100/1000=720Hz
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseInitStructure.TIM_ClockDivision = 0; //时钟分频,这里不涉及
#ifdef Time1
TIM_TimeBaseInitStructure.TIM_RepetitionCounter; //This parameter is valid only for TIM1 and TIM8
#endif
TIM_TimeBaseInit( TIMx, &TIM_TimeBaseInitStructure ); //配置参数
TIM_ClearITPendingBit( TIMx, TIM_IT_Update ); //清除中断标示位
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Inactive; //ARR与CCRx相同时强制OCxREF为低
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //输出使能通道1
#ifdef Time1
TIM_OCInitStructure.TIM_OutputNState =;
#endif
TIM_OCInitStructure.TIM_Pulse = CCR1_VAL;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //OCx=!OCxREF _High OCx=OCxREF
#ifdef Time1
TIM_OCInitStructure.TIM_OCNPolarity =;
TIM_OCInitStructure.TIM_OCIdleState =;
TIM_OCInitStructure.TIM_OCNIdleState =;
#endif
TIM_OC1Init( TIMx, &TIM_OCInitStructure );
TIM_OC1PreloadConfig( TIMx, TIM_OCPreload_Enable ); //使能CCR1预装载
TIM_ITConfig( TIMx, TIM_IT_CC1, ENABLE ); //使能OC1比较中断
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Active; //ARR与CCRx相同时强制OCxREF为高
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //输出使能通道2
TIM_OCInitStructure.TIM_Pulse = CCR2_VAL;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //OCx=!OCxREF _High OCx=OCxREF
TIM_OC2Init( TIMx, &TIM_OCInitStructure );
TIM_OC2PreloadConfig( TIMx, TIM_OCPreload_Enable );
TIM_ITConfig( TIMx, TIM_IT_CC2, ENABLE );
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing; //ARR与CCRx比较结果对OCxREF无效
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //输出使能通道3
TIM_OCInitStructure.TIM_Pulse = CCR3_VAL;
TIM_ITConfig( TIMx, TIM_IT_CC3, ENABLE );
TIM_OC3Init( TIMx, &TIM_OCInitStructure );
TIM_OC3PreloadConfig( TIMx, TIM_OCPreload_Enable );
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //ARR与CCRx比较结果对OCxREF采用PWM1模式
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //输出使能通道4
TIM_OCInitStructure.TIM_Pulse = CCR4_VAL;
//TIM_ITConfig(TIMx,TIM_IT_CC4,ENABLE); //PWM就没有必要设置中断当然也可以在中断里面改变占空比
TIM_OC4Init( TIMx, &TIM_OCInitStructure );
TIM_OC4PreloadConfig( TIMx, TIM_OCPreload_Enable );
TIM_ARRPreloadConfig( TIMx, ENABLE ); //开启ARR预装载
TIM_Cmd( TIMx, ENABLE ); //启动定时器
}
void Time_OUT_PWM_Init( void )
{
Time_OUT_PWM_GPIO_Config( );
Time_GPIO_Config( );
Time_NVIC_Config( );
Time_OUT_PWM_Config( ); //定时器配置
}
//------------------------------------------------------------------------------
// 4、PWMI模式
#include"stm32f10x.h"
#include"time.h"
static Time_NVIC_Config( void )
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_SetVectorTable( NVIC_VectTab_FLASH, 0x0000 );
NVIC_PriorityGroupConfig( NVIC_PriorityGroup_1 );
NVIC_InitStructure.NVIC_IRQChannel = TIMx_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init( &NVIC_InitStructure );
}
static void Time_IN_PWM_GPIO_Config( void )
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( TIMx_IN_GPIO_RCC, ENABLE );
GPIO_InitStructure.GPIO_Pin = TIMx_IN_Pin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入模式
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( TIMx_IN_Port, &GPIO_InitStructure );
}
static void Time_IN_PWM_Config( void )
{
#if 0
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
#endif
TIM_ICInitTypeDef TIM_ICInitStructure;
RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIMx, ENABLE ); //开启时钟
TIM_DeInit( TIM2 );
#if 0
TIM_TimeBaseInitStructure.TIM_Prescaler =(100-1); //时钟分频系数
TIM_TimeBaseInitStructure.TIM_Period =(1000-1);//自动重装寄存器 PWM频率:72M/100/1000=720Hz
TIM_TimeBaseInitStructure.TIM_CounterMode =TIM_CounterMode_Up;//向上计数模式
TIM_TimeBaseInitStructure.TIM_ClockDivision =0;//时钟分频,这里不涉及
#ifdef Time1
TIM_TimeBaseInitStructure.TIM_RepetitionCounter; //This parameter is valid only for TIM1 and TIM8
#endif
TIM_TimeBaseInit(TIMx,&TIM_TimeBaseInitStructure); //配置参数
TIM_ClearITPendingBit(TIMx,TIM_IT_Update);//清除中断标示位
#endif
TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿有效
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //TIM Input 1, 2, 3 or 4 is selected to be
// connected to IC1, IC2, IC3 or IC4, respectively */
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //无预分频
TIM_ICInitStructure.TIM_ICFilter = 0x0; //无滤波
TIM_ICInit( TIMx, &TIM_ICInitStructure ); //初始化PWM输入模式 //参见函数体与参考手册关于PWMI说明
TIM_PWMIConfig( TIMx, &TIM_ICInitStructure );
TIM_SelectInputTrigger( TIMx, TIM_TS_TI2FP2 ); //选择TI2FP2作为TIMx输入触发一个信号来之后启动定时器开始计数
TIM_SelectSlaveMode( TIMx, TIM_SlaveMode_Reset ); //选择从模式控制器为复位模式,选中的TRGI上升沿重新初始化计数器
//从模式控制器连接到TI1FP1 TI2FP2 只要两者有效为设置的电平,就会复位计数器参见TIME结构图
TIM_SelectMasterSlaveMode( TIMx, TIM_MasterSlaveMode_Enable ); //使能主从模式 ??????????????????
TIM_Cmd( TIMx, ENABLE );
TIM_ITConfig( TIMx, TIM_IT_CC2, ENABLE );
}
void Time_IN_PWM_Init( void )
{
Time_IN_PWM_GPIO_Config( );
Time_NVIC_Config( );
Time_IN_PWM_Config( ); //定时器配置
}
//------------------------------------------------------------------------------
// 5、单脉冲模式
#include"stm32f10x.h"
#include"time.h"
static Time_NVIC_Config( void )
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_SetVectorTable( NVIC_VectTab_FLASH, 0x0000 );
NVIC_PriorityGroupConfig( NVIC_PriorityGroup_1 );
NVIC_InitStructure.NVIC_IRQChannel = TIMx_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init( &NVIC_InitStructure );
}
static Time_SinglePluse_IN_GPIO_Config( void )
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( TIMx_IN_GPIO_RCC, ENABLE );
GPIO_InitStructure.GPIO_Pin = TIMx_IN_Pin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入模式
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( TIMx_IN_Port, &GPIO_InitStructure );
}
static Time_SinglePluse_OUT_GPIO_Config( void )
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( TIMx_OUT_GPIO_RCC, ENABLE );
GPIO_InitStructure.GPIO_Pin = TIMx_OUT_Pin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //推免复用输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( TIMx_OUT_Port, &GPIO_InitStructure );
}
static void Time_SinglePluse_Config( void )
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIMx, ENABLE ); //开启时钟
TIM_DeInit( TIM2 );
TIM_TimeBaseInitStructure.TIM_Prescaler = 1; //时钟分频系数
TIM_TimeBaseInitStructure.TIM_Period = 65535; //自动重装寄存器
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseInitStructure.TIM_ClockDivision = 0; //时钟分频,这里不涉及
#ifdef Time1
TIM_TimeBaseInitStructure.TIM_RepetitionCounter; //This parameter is valid only for TIM1 and TIM8
#endif
TIM_TimeBaseInit( TIMx, &TIM_TimeBaseInitStructure ); //配置参数
TIM_ClearITPendingBit( TIMx, TIM_IT_Update ); //清除中断标示位
TIM_ICStructInit( &TIM_ICInitStructure );
TIM_ICInitStructure.TIM_Channel = TIM_Channel_2; //通道2为输入
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿有效
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //TIM Input 1, 2, 3 or 4 is selected to be
// connected to IC1, IC2, IC3 or IC4, respectively*/
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //无预分频
TIM_ICInitStructure.TIM_ICFilter = 0x0; //无滤波
TIM_ICInit( TIMx, &TIM_ICInitStructure ); //初始化输入模式
TIM_SelectOnePulseMode( TIMx, TIM_OPMode_Single ); //选择单脉冲模式这样下一次更新时间是停止计数器
TIM_SelectInputTrigger( TIMx, TIM_TS_TI2FP2 ); //选择TI2FP2作为TIMx输入触发一个信号来之后启动定时器开始计数
TIM_SelectSlaveMode( TIMx, TIM_SlaveMode_Trigger ); //选择从模式控制器为触发模式其连接到了TI2FP2 让从模式控制器启动计数器
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //输出模式选择为PWM模式2 用PWM2 向上计数时,CNT
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //使能通道
#ifdef Time1
TIM_OCInitStructure.TIM_OutputNState =;
#endif
TIM_OCInitStructure.TIM_Pulse = 12345; //CCRx里面存放的值
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //OCREF与OC实际输出相同
#ifdef Time1
TIM_OCInitStructure.TIM_OCNPolarity =;
TIM_OCInitStructure.TIM_OCIdleState =;
TIM_OCInitStructure.TIM_OCNIdleState =;
#endif
TIM_OC1Init( TIMx, &TIM_OCInitStructure ); //使用通道1作为单脉冲的输出通道
//TIM_Cmd(TIMx, ENABLE); //使用TI2FP1来触发定时器,不需要软件启动定时器
}
void Time_SinglePluse_Init( void )
{
Time_SinglePluse_IN_GPIO_Config( ); //配置time2的通道2为输入
Time_SinglePluse_OUT_GPIO_Config( ); //配置time2的通道1为输出
Time_NVIC_Config( ); //可以不用
Time_SinglePluse_Config( ); //定时器配置
}
//------------------------------------------------------------------------------
// 6、定时器联级
#include"stm32f10x.h"
#include"time.h"
static Time_NVIC_Config( void )
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_SetVectorTable( NVIC_VectTab_FLASH, 0x0000 );
NVIC_PriorityGroupConfig( NVIC_PriorityGroup_1 );
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init( &NVIC_InitStructure );
}
static Time_Connect_GPIO_Config( void )
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB, ENABLE );
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_6; //time2 ch1 pin.0 time3 cha1 pin.6
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //推免复用输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( GPIOA, &GPIO_InitStructure );
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; //time4 ch1 pin.6
GPIO_Init( GPIOB, &GPIO_InitStructure );
}
static void Time_Connect_Config( void )
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(
RCC_APB1Periph_TIM2 | RCC_APB1Periph_TIM3 | RCC_APB1Periph_TIM4, ENABLE );
TIM_DeInit( TIM2 );
TIM_DeInit( TIM3 );
TIM_DeInit( TIM4 );
TIM_TimeBaseInitStructure.TIM_Prescaler = 0; //时钟分频系数
TIM_TimeBaseInitStructure.TIM_Period = 99; //自动重装寄存器
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseInitStructure.TIM_ClockDivision = 0; //时钟分频,这里不涉及
#ifdef Time1 //或者Time8
TIM_TimeBaseInitStructure.TIM_RepetitionCounter; //This parameter is valid only for TIM1 and TIM8
#endif
TIM_TimeBaseInit( TIM2, &TIM_TimeBaseInitStructure ); //配置参数
TIM_ClearITPendingBit( TIM2, TIM_IT_Update ); //清除中断标示位
TIM_TimeBaseInitStructure.TIM_Period = 5;
TIM_TimeBaseInit( TIM3, &TIM_TimeBaseInitStructure );
TIM_ClearITPendingBit( TIM3, TIM_IT_Update );
TIM_TimeBaseInitStructure.TIM_Period = 5;
TIM_TimeBaseInit( TIM4, &TIM_TimeBaseInitStructure );
TIM_ClearITPendingBit( TIM4, TIM_IT_Update );
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //输出模式选择为PWM模式2 用PWM2 向上计数时,CNT
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //使能通道
TIM_OCInitStructure.TIM_Pulse = 49; //CCRx里面存放的值
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //OCREF与OC实际输出相同
TIM_OC1Init( TIM2, &TIM_OCInitStructure ); //使用通道1作为单脉冲的输出通道
TIM_SelectMasterSlaveMode( TIM2, TIM_MasterSlaveMode_Enable ); //使能主从模式
TIM_SelectOutputTrigger( TIM2, TIM_TRGOSource_Update ); //选择Time2的更新事件作为触发输出
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_Pulse = 3;
TIM_OC1Init( TIM3, &TIM_OCInitStructure );
TIM_OC1Init( TIM4, &TIM_OCInitStructure );
TIM_SelectSlaveMode( TIM3, TIM_SlaveMode_Gated ); //从模式的输入触发选择为门控模式
TIM_SelectInputTrigger( TIM3, TIM_TS_ITR1 ); //从模式触发源选择为内部触发1?????????????为什么是内部触发1 不是0 2 3
//原因:ITR0 ITR1 ITR2 ITR3 对应主模式的TIM2 TIM3 TIM4 TIM5
TIM_SelectSlaveMode( TIM4, TIM_SlaveMode_Gated );
TIM_SelectInputTrigger( TIM4, TIM_TS_ITR1 );
TIM_Cmd( TIM2, ENABLE );
TIM_Cmd( TIM3, ENABLE );
TIM_Cmd( TIM4, ENABLE );
}
void Time_Connect_Init( void )
{
Time_Connect_GPIO_Config( );
Time_NVIC_Config( ); //可以不用
Time_Connect_Config( ); //定时器配置
}