用两个定时器捕获不同的频率，定时器3没用。怎么改

whydlj · 发表于 2015-12-9 16:54:26

TIM_ICInitTypeDef TIM2_ICInitStructure;
TIM_ICInitTypeDef TIM3_ICInitStructure;
void TIM2_Cap_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //使能TIM2时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能GPIOA时钟

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //PA0 清除之前设置
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //PA0 输入
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_ResetBits(GPIOA,GPIO_Pin_0); //PA0 下拉

//初始化定时器2 TIM2
TIM_TimeBaseStructure.TIM_Period = arr; //设定计数器自动重装值
TIM_TimeBaseStructure.TIM_Prescaler =psc; //预分频器
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式
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

//初始化TIM2输入捕获参数
TIM2_ICInitStructure.TIM_Channel = TIM_Channel_1; //CC1S=01 选择输入端 IC1映射到TI1上
TIM2_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿捕获
TIM2_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //映射到TI1上
TIM2_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置输入分频,不分频
TIM2_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波器不滤波
TIM_ICInit(TIM2, &TIM2_ICInitStructure);

//中断分组初始化
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; //TIM2中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3; //先占优先级2级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //从优先级0级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器

TIM_ITConfig(TIM2,TIM_IT_Update|TIM_IT_CC1,ENABLE);//允许更新中断 ,允许CC1IE捕获中断

TIM_Cmd(TIM2,ENABLE ); //使能定时器2

}
void TIM3_Cap_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //使能TIM3时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能GPIOA时钟

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; //PA1 清除之前设置
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //PA1 输入
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_ResetBits(GPIOA,GPIO_Pin_1); //PA1 下拉

//初始化定时器3 TIM3
TIM_TimeBaseStructure.TIM_Period = arr; //设定计数器自动重装值
TIM_TimeBaseStructure.TIM_Prescaler =psc; //预分频器
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式
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

//初始化TIM3输入捕获参数
TIM3_ICInitStructure.TIM_Channel = TIM_Channel_1; //CC1S=01 选择输入端 IC1映射到TI1上
TIM3_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿捕获
TIM3_ICInitStructure.TIM_ICSelection = TIM_ICSelection_IndirectTI; //映射到TI1上
TIM3_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置输入分频,不分频
TIM3_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波器不滤波
TIM_ICInit(TIM3, &TIM3_ICInitStructure);

//中断分组初始化
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM3中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority =4; //先占优先级2级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //从优先级0级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器

TIM_ITConfig(TIM3,TIM_IT_Update|TIM_IT_CC1,ENABLE);//允许更新中断 ,允许CC1IE捕获中断

TIM_Cmd(TIM3,ENABLE ); //使能定时器2

}
u16 a=0;
//u16 CountPulse;
u8 TIM2CH1_CAPTURE_STA=0; //输入捕获状态
u32 TIM2CH1_CAPTURE_VAL; //输入捕获值
u8 TIM3CH1_CAPTURE_STA=0; //输入捕获状态
u32 TIM3CH1_CAPTURE_VAL; //输入捕获值
//定时器5中断服务程序
void TIM2_IRQHandler(void)
{
if((TIM2CH1_CAPTURE_STA&0X80)==0) //还未成功捕获
{
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)

{
if(TIM2CH1_CAPTURE_STA&0X40) //已经捕获到高电平了
{
if((TIM2CH1_CAPTURE_STA&0X3F)==0X3F) //高电平太长了
{
TIM2CH1_CAPTURE_STA|=0X80;//标记成功捕获了一次
TIM2CH1_CAPTURE_VAL=0XFFFF;
}else TIM2CH1_CAPTURE_STA++;
}
}
if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)//捕获1发生捕获事件
{

if(TIM2CH1_CAPTURE_STA&0X40) //捕获到一个上升沿
{
a++;
if(a==1000)
{
TIM2CH1_CAPTURE_STA|=0X80; //标记成功捕获到一次上升沿
TIM2CH1_CAPTURE_VAL=TIM_GetCapture1(TIM2);
a=0;
}
}
else //还未开始,第一次捕获上升沿
{
TIM2CH1_CAPTURE_STA=0; //清空
TIM2CH1_CAPTURE_VAL=0;
TIM_SetCounter(TIM2,0);
TIM2CH1_CAPTURE_STA|=0X40; //标记捕获到了上升沿
// TIM_OC1PolarityConfig(TIM2,TIM_ICPolarity_Rising); //CC1P=0 设置为上升沿捕获
}
}
}
TIM_ClearITPendingBit(TIM2,TIM_IT_CC1|TIM_IT_Update); //清除中断标志位
}
void TIM3_IRQHandler(void)
{
if((TIM3CH1_CAPTURE_STA&0X80)==0) //还未成功捕获
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET)

{
if(TIM3CH1_CAPTURE_STA&0X40) //已经捕获到高电平了
{
if((TIM3CH1_CAPTURE_STA&0X3F)==0X3F) //高电平太长了
{
TIM3CH1_CAPTURE_STA|=0X80;//标记成功捕获了一次
TIM3CH1_CAPTURE_VAL=0XFFFF;
}else TIM3CH1_CAPTURE_STA++;
}
}
if (TIM_GetITStatus(TIM3, TIM_IT_CC1) != RESET)//捕获1发生捕获事件
{

if(TIM3CH1_CAPTURE_STA&0X40) //捕获到一个上升沿
{
a++;
if(a==1000)
{
TIM3CH1_CAPTURE_STA|=0X80; //标记成功捕获到一次上升沿
TIM3CH1_CAPTURE_VAL=TIM_GetCapture1(TIM3);
a=0;
}
}
else //还未开始,第一次捕获上升沿
{
TIM3CH1_CAPTURE_STA=0; //清空
TIM3CH1_CAPTURE_VAL=0;
TIM_SetCounter(TIM3,0);
TIM3CH1_CAPTURE_STA|=0X40; //标记捕获到了上升沿
}
}
}
TIM_ClearITPendingBit(TIM3,TIM_IT_CC1|TIM_IT_Update); //清除中断标志位
}