[mw_shl_code=c,true]
用原子哥的采集程序改的,把PA0改成了PC8,TIM5CH1是不是也相应的得改成TIM3CH3。但是好像采集不到什么,debug进程序之后发现也能运行~~
这是采集配置部分
//定时器3通道3输入捕获配置
TIM_ICInitTypeDef TIM3_ICInitStructure;
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_GPIOC, ENABLE); //使能GPIOC时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //PC8 清除之前设置
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //PC8 输入
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_ResetBits(GPIOC,GPIO_Pin_8); //PC8 下拉
//初始化定时器5 TIM5
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TIM5输入捕获参数
TIM3_ICInitStructure.TIM_Channel = TIM_Channel_3; //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_DirectTI; //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 = 0; //先占优先级0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3
}
u8 TIM3CH3_CAPTURE_STA=0; //输入捕获状态
u16 TIM3CH3_CAPTURE_VAL; //输入捕获值
//定时器3中断服务程序
void TIM3_IRQHandler(void)
{
if((TIM3CH3_CAPTURE_STA&0X80)==0)//还未成功捕获
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET)
{
if(TIM3CH3_CAPTURE_STA&0X40)//已经捕获到高电平了
{
if((TIM3CH3_CAPTURE_STA&0X3F)==0X3F)//高电平太长了
{
TIM3CH3_CAPTURE_STA|=0X80;//标记成功捕获了一次
TIM3CH3_CAPTURE_VAL=0XFFFF;
}else TIM3CH3_CAPTURE_STA++;
}
}
if (TIM_GetITStatus(TIM3, TIM_IT_CC1) != RESET)//捕获1发生捕获事件
{
if(TIM3CH3_CAPTURE_STA&0X40) //捕获到一个下降沿
{
TIM3CH3_CAPTURE_STA|=0X80; //标记成功捕获到一次上升沿
TIM3CH3_CAPTURE_VAL=TIM_GetCapture1(TIM3);
TIM_OC3PolarityConfig(TIM3,TIM_ICPolarity_Rising); //FP=0 设置为上升沿捕获
}else //还未开始,第一次捕获上升沿
{
TIM3CH3_CAPTURE_STA=0; //清空
TIM3CH3_CAPTURE_VAL=0;
TIM_SetCounter(TIM3,0);
TIM3CH3_CAPTURE_STA|=0X40; //标记捕获到了上升沿
TIM_OC3PolarityConfig(TIM3,TIM_ICPolarity_Falling); //CC1P=1 设置为下降沿捕获
}
}
}
TIM_ClearITPendingBit(TIM3, TIM_IT_CC1|TIM_IT_Update); //清除中断标志位
}
下面是主函数部分
extern u8 TIM3CH3_CAPTURE_STA; //输入捕获状态
extern u16 TIM3CH3_CAPTURE_VAL; //输入捕获值
int main(void)
{
u32 temp=0;
delay_init(); //延时函数初始化
NVIC_Configuration(); //设置NVIC中断分组2:2位抢占优先级,2位响应优先级
uart_init(9600); //串口初始化为9600
printf("串口初始化完成!\r\n");
LED_Init(); //LED端口初始化
printf("LED端口初始化完成!\r\n");
// TIM3_PWM_Init(899,0); //不分频。PWM频率=72000/(899+1)=80Khz
TIM3_Cap_Init(0XFFFF,72-1); //以1Mhz的频率计数
printf("TIM3频率传递完成!\r\n");
while(1)
{
// printf("进入while循环!\r\n");
delay_ms(10);
// TIM3_IRQHandler();
TIM_SetCompare2(TIM3,TIM_GetCapture2(TIM3)+1);
if(TIM_GetCapture2(TIM3)==300)TIM_SetCompare2(TIM3,0);
// printf("延时函数调用完成!\r\n");
if(TIM3CH3_CAPTURE_STA&0X80)//成功捕获到了一次上升沿
{
printf("成功捕获到了一次上升沿!\r\n");
temp=TIM3CH3_CAPTURE_STA&0X3F;
printf("TEMP1=%d \r\n",temp);
temp*=65536;//溢出时间总和
printf("TEMP2=%d \r\n",temp);
temp+=TIM3CH3_CAPTURE_VAL;//得到总的高电平时间
printf("TIM3=%d \r\n",TIM3CH3_CAPTURE_VAL);
printf("HIGH:%d us\r\n",temp);//打印总的高点平时间
TIM3CH3_CAPTURE_STA=0;//开启下一次捕获
}
}
}
[/mw_shl_code]
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