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#include "timer.h"
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#include "delay.h"
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//PWM输出初始化
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//arr：自动重装值
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//psc：时钟预分频数
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int miao=0,fen=0,shi=0;
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void TIM1_PWM_Init(u16 arr,u16 psc)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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TIM_OCInitTypeDef TIM_OCInitStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);//
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE); //使能GPIO外设时钟使能
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//设置该引脚为复用输出功能,输出TIM1 CH1的PWM脉冲波形
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //TIM_CH1
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值 80K
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TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 不分频
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TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
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TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式
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TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位
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TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2
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TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
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TIM_OCInitStructure.TIM_Pulse = arr; //设置待装入捕获比较寄存器的脉冲值
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TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性:TIM输出比较极性高
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TIM_OC1Init(TIM1, &TIM_OCInitStructure); //根据TIM_OCInitStruct中指定的参数初始化外设TIMx
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TIM_CtrlPWMOutputs(TIM1,ENABLE); //MOE 主输出使能
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//中断分组初始化
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NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn; //TIM3中断
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //先占优先级2级
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //从优先级0级
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
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NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
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TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); //CH1预装载使能
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TIM_ARRPreloadConfig(TIM1, ENABLE); //使能TIMx在ARR上的预装载寄存器
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TIM_Cmd(TIM1, ENABLE); //使能TIM1
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}
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//通用定时器中断初始化
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//这里时钟选择为APB1的2倍，而APB1为36M
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//arr：自动重装值。
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//psc：时钟预分频数
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//这里使用的是定时器2
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void TIM2_Init(u16 arr,u16 psc)
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{
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TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //使能TIM2时钟
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//初始化定时器2
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TIM_TimeBaseStructure.TIM_Period = arr; //设定计数器自动重装值
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TIM_TimeBaseStructure.TIM_Prescaler =psc; //预分频器
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TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割:TDTS = Tck_tim
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TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式
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TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位
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//中断分组初始化
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NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; //TIM3中断
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //先占优先级2级
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //从优先级0级
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
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NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
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TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);//允许更新中断 ,
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TIM_Cmd(TIM2,ENABLE ); //使能定时器2
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}
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//这里使用的是定时器3!
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void TIM3_Init(u16 arr,u16 psc)
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{
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TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //时钟使能
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TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值 计数到5000为500ms
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TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 10Khz的计数频率
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TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
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TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式
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TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位
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TIM_ITConfig( //使能或者失能指定的TIM中断
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TIM3, //TIM3
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TIM_IT_Update ,
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ENABLE //使能
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);
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NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM3中断
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //先占优先级0级
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //从优先级2级
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
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NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
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TIM_Cmd(TIM3, ENABLE); //使能TIMx外设
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}
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