}
LCD_ShowNum(65,210,yy,3,16);
LCD_DrawRectangle(10, 10, 210, 150);//画矩形
LCD_DrawPoint(xp,yp);//画点
if((xp!=xp1 | yp!=yp1)&&DrawLine_flag==1) }
{ }
LCD_DrawLine(xp1, yp1, xp, yp); ShowChinese(10,170);//显示汉字
//定时器5通道1和通道2输入捕获配置 TIM_ICInitTypeDef TIM5_ICInitStructure;
void TIM5_Cap_Init(u16 arr,u16 psc) {
GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure; 钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能GPIOA时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE); //使能TIM5时
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1; //PA0 清除
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之前设置
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //PA0 下拉输入 GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_ResetBits(GPIOA,GPIO_Pin_0|GPIO_Pin_1);
//初始化定时器时基参数 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(TIM5,
&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1参数
TIM5_ICInitStructure.TIM_Channel = TIM_Channel_1; //CC1S=01 选
择输入端 IC1映射到TI1上
TIM5_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //
上升沿捕获
TIM5_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
//映射到TI1上
TIM5_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置输
入分频,不分频
TIM5_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波
器 不滤波
TIM_ICInit(TIM5, &TIM5_ICInitStructure);
//初始化TIM5输入捕获2参数
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TIM5_ICInitStructure.TIM_Channel = TIM_Channel_2; //CC1S=01 选
择输入端 IC1映射到TI1上
TIM5_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //
上升沿捕获
TIM5_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
//映射到TI1上
TIM5_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置输
入分频,不分频
TIM5_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波
器 不滤波
TIM_ICInit(TIM5, &TIM5_ICInitStructure);
//中断分组初始化
NVIC_InitStructure.NVIC_IRQChannel = TIM5_IRQn; //TIM5中断 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //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(TIM5,TIM_IT_Update|TIM_IT_CC1|TIM_IT_CC2,ENABLE);//
允许更新中断 ,允许CC1IE捕获中断
//TIM_IT_CC1：TIM捕获/比较1中断源
TIM_Cmd(TIM5,ENABLE ); //使能定时器5 }
u8 TIM5CH1_CAPTURE_STA=0; //输入捕获状态
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u16 TIM5CH1_CAPTURE_VAL; //输入捕获值
u8 TIM5CH2_CAPTURE_STA=0; //输入捕获状态 u16 TIM5CH2_CAPTURE_VAL; //输入捕获值
//定时器5中断服务程序 void TIM5_IRQHandler(void) {
//通道1进行捕获
if((TIM5CH1_CAPTURE_STA&0X80)==0)//表示还未成功完成捕获
{
if (TIM_GetITStatus(TIM5, TIM_IT_Update) != RESET) //表示更新
中断已经发生
{ }
if (TIM_GetITStatus(TIM5, TIM_IT_CC1) != RESET)//表示捕获1发
if(TIM5CH1_CAPTURE_STA&0X40)//表示已经捕获到高电平了 {
if((TIM5CH1_CAPTURE_STA&0X3F)==0X3F)//判断高电平太长了 { }
else TIM5CH1_CAPTURE_STA++;
TIM5CH1_CAPTURE_STA|=0X80;//强制标记成功捕获了一次 TIM5CH1_CAPTURE_VAL=0XFFFF;
}
生捕获事件
{
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if(TIM5CH1_CAPTURE_STA&0X40) //表示捕获到一个下降沿
{
//标记成功捕获了一次
TIM5CH1_CAPTURE_STA|=0X80;
TIM5CH1_CAPTURE_VAL=TIM_GetCapture1(TIM5); //得到高电
平的值
TIM_OC1PolarityConfig(TIM5,TIM_ICPolarity_Rising);
//CC1P=0 设置为上升沿捕获
} else {
TIM5CH1_CAPTURE_STA=0; TIM5CH1_CAPTURE_VAL=0; TIM_SetCounter(TIM5,0); TIM5CH1_CAPTURE_STA|=0X40;
//标记捕获到了上升沿
//清空
//还未开始,第一次捕获上升沿
TIM_OC1PolarityConfig(TIM5,TIM_ICPolarity_Falling);
//CC1P=1 设置为下降沿捕获
}
}
}
//通道2进行捕获
if((TIM5CH2_CAPTURE_STA&0X80)==0)//表示还未成功完成捕获 {
if (TIM_GetITStatus(TIM5, TIM_IT_Update) != RESET) //表示更新
中断已经发生
{
if(TIM5CH2_CAPTURE_STA&0X40)//表示已经捕获到高电平了 {
if((TIM5CH2_CAPTURE_STA&0X3F)==0X3F)//判断高电平太长了
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