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含有一路，兩路脈沖的測(cè)量
通過lcd屏顯示- #include "timer.h"
- #include "led.h"
- #include "usart.h"
- #include "sys.h"
- #include "key.h"
- //PWM輸出初始化
- //arr：自動(dòng)重裝值
- //psc：時(shí)鐘預(yù)分頻數(shù)
- //定時(shí)器2通道1輸入捕獲配置
- void TIM2_Cap_Init(u16 arr,u16 psc)
- {
- TIM_ICInitTypeDef TIM2_ICInitStructure;
- GPIO_InitTypeDef GPIO_InitStructure;
- TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
- NVIC_InitTypeDef NVIC_InitStructure;
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //使能TIM2時(shí)鐘
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能GPIOA時(shí)鐘
- // RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); //使能GPIOA時(shí)鐘
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //PA0 清除之前設(shè)置
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //PA0 輸入
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- GPIO_ResetBits(GPIOA,GPIO_Pin_0); //PA0 下拉
-
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14; //PA0 清除之前設(shè)置
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //PA0 輸入
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- GPIO_ResetBits(GPIOA,GPIO_Pin_14); //PA0 下拉
-
- //初始化定時(shí)器2 TIM2
- TIM_TimeBaseStructure.TIM_Period = arr; //設(shè)定計(jì)數(shù)器自動(dòng)重裝值
- TIM_TimeBaseStructure.TIM_Prescaler =psc; //預(yù)分頻器
- TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //設(shè)置時(shí)鐘分割:TDTS = Tck_tim
- TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上計(jì)數(shù)模式
- TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //根據(jù)TIM_TimeBaseInitStruct中指定的參數(shù)初始化TIMx的時(shí)間基數(shù)單位
-
- //初始化TIM2輸入捕獲參數(shù)
- TIM2_ICInitStructure.TIM_Channel = TIM_Channel_1; //CC1S=01 選擇輸入端 IC1映射到TI1上
- TIM2_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿捕獲
- TIM2_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //映射到TI1上
- TIM2_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置輸入分頻,不分頻
- TIM2_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置輸入濾波器 不濾波
- TIM_ICInit(TIM2, &TIM2_ICInitStructure);
-
- //中斷分組初始化
- NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; //TIM2中斷
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //先占優(yōu)先級(jí)2級(jí)
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //從優(yōu)先級(jí)0級(jí)
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
- NVIC_Init(&NVIC_InitStructure); //根據(jù)NVIC_InitStruct中指定的參數(shù)初始化外設(shè)NVIC寄存器
-
- TIM_ITConfig(TIM2,TIM_IT_Update|TIM_IT_CC1,ENABLE);//允許更新中斷 ,允許CC1IE捕獲中斷
-
- TIM_Cmd(TIM2,ENABLE ); //使能定時(shí)器2
-
- }
- void TIM3_Cap_Init(u16 arr,u16 psc)
- {
- TIM_ICInitTypeDef TIM2_ICInitStructure;
- GPIO_InitTypeDef GPIO_InitStructure;
- TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
- NVIC_InitTypeDef NVIC_InitStructure;
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //使能TIM2時(shí)鐘
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能GPIOA時(shí)鐘
- // RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); //使能GPIOA時(shí)鐘
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; //PA0 清除之前設(shè)置
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //PA0 輸入
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- GPIO_ResetBits(GPIOA,GPIO_Pin_0); //PA0 下拉
-
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13; //PA0 清除之前設(shè)置
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //PA0 輸入
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- GPIO_ResetBits(GPIOA,GPIO_Pin_13); //PA0 下拉
-
- //初始化定時(shí)器2 TIM2
- TIM_TimeBaseStructure.TIM_Period = arr; //設(shè)定計(jì)數(shù)器自動(dòng)重裝值
- TIM_TimeBaseStructure.TIM_Prescaler =psc; //預(yù)分頻器
- TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //設(shè)置時(shí)鐘分割:TDTS = Tck_tim
- TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上計(jì)數(shù)模式
- TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根據(jù)TIM_TimeBaseInitStruct中指定的參數(shù)初始化TIMx的時(shí)間基數(shù)單位
-
- //初始化TIM2輸入捕獲參數(shù)
- TIM2_ICInitStructure.TIM_Channel = TIM_Channel_1; //CC1S=01 選擇輸入端 IC1映射到TI1上
- TIM2_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿捕獲
- TIM2_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //映射到TI1上
- TIM2_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置輸入分頻,不分頻
- TIM2_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置輸入濾波器 不濾波
- TIM_ICInit(TIM3, &TIM2_ICInitStructure);
-
- //中斷分組初始化
- NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM2中斷
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //先占優(yōu)先級(jí)2級(jí)
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //從優(yōu)先級(jí)0級(jí)
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
- NVIC_Init(&NVIC_InitStructure); //根據(jù)NVIC_InitStruct中指定的參數(shù)初始化外設(shè)NVIC寄存器
-
- TIM_ITConfig(TIM3,TIM_IT_Update|TIM_IT_CC1,ENABLE);//允許更新中斷 ,允許CC1IE捕獲中斷
-
- TIM_Cmd(TIM3,ENABLE ); //使能定時(shí)器2
-
- }
- u8 TIM2CH1_CAPTURE_STA=0; //輸入捕獲狀態(tài)
- u16 TIM2CH1_CAPTURE_VAL; //輸入捕獲值
- unsigned long a=10000;
-
- //定時(shí)器5中斷服務(wù)程序
- void TIM2_IRQHandler(void)
- {
- if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)//捕獲1發(fā)生捕獲事件
- {
- if(TIM2CH1_CAPTURE_STA&0X40) //捕獲到一個(gè)下降沿
- {
- TIM2CH1_CAPTURE_STA|=0X80; //標(biāo)記成功捕獲到一次上升沿
- if(IN==1)
- {
- a++;
-
- }
- if(IN==0)
- {
- a--;
-
- }
- TIM_OC1PolarityConfig(TIM2,TIM_ICPolarity_Rising); //CC1P=0 設(shè)置為上升沿捕獲
- }else //還未開始,第一次捕獲上升沿
- {
- TIM2CH1_CAPTURE_STA=0; //清空
- TIM2CH1_CAPTURE_VAL=0;
- TIM_SetCounter(TIM2,0);
- TIM2CH1_CAPTURE_STA|=0X40; //標(biāo)記捕獲到了上升沿
- TIM_OC1PolarityConfig(TIM2,TIM_ICPolarity_Falling); //CC1P=1 設(shè)置為下降沿捕獲
- }
- }
-
- TIM_ClearITPendingBit(TIM2, TIM_IT_CC1|TIM_IT_Update); //清除中斷標(biāo)志位
- }
- u8 TIM3CH1_CAPTURE_STA=0; //輸入捕獲狀態(tài)
- u16 TIM3CH1_CAPTURE_VAL; //輸入捕獲值
- unsigned long b=10000;
- void TIM3_IRQHandler(void)
- {
- if (TIM_GetITStatus(TIM3, TIM_IT_CC1) != RESET)//捕獲1發(fā)生捕獲事件
- {
- if(TIM3CH1_CAPTURE_STA&0X40) //捕獲到一個(gè)下降沿
- {
- TIM3CH1_CAPTURE_STA|=0X80; //標(biāo)記成功捕獲到一次上升沿
- if(in==1)
- {
- b++;
-
- }
- if(in==0)
- {
- b--;
-
- }
- TIM_OC1PolarityConfig(TIM3,TIM_ICPolarity_Rising); //CC1P=0 設(shè)置為上升沿捕獲
- }else //還未開始,第一次捕獲上升沿
- {
- TIM3CH1_CAPTURE_STA=0; //清空
- TIM3CH1_CAPTURE_VAL=0;
- TIM_SetCounter(TIM3,0);
- TIM3CH1_CAPTURE_STA|=0X40; //標(biāo)記捕獲到了上升沿
- TIM_OC1PolarityConfig(TIM3,TIM_ICPolarity_Falling); //CC1P=1 設(shè)置為下降沿捕獲
- }
- }
-
- TIM_ClearITPendingBit(TIM3, TIM_IT_CC1|TIM_IT_Update); //清除中斷標(biāo)志位
- }
- #include "led.h"
- #include "delay.h"
- #include "sys.h"
- #include "timer.h"
- #include "usart.h"
- #include "key.h"
- //ALIENTEK Mini STM32開發(fā)板范例代碼9
- //輸入捕獲實(shí)驗(yàn)
- //技術(shù)支持：www.openedv.com
- //廣州市星翼電子科技有限公司
- extern u8 TIM2CH1_CAPTURE_STA; //輸入捕獲狀態(tài)
- extern u16 TIM2CH1_CAPTURE_VAL ; //輸入捕獲值
- extern u8 TIM3CH1_CAPTURE_STA; //輸入捕獲狀態(tài)
- extern u16 TIM3CH1_CAPTURE_VAL ; //輸入捕獲值
- extern unsigned long a,b;
- int main(void)
- {
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);// 設(shè)置中斷優(yōu)先級(jí)分組2
- delay_init(); //延時(shí)函數(shù)初始化
- uart_init(9600); //9600
- LED_Init(); //初始化與LED連接的硬件接口
- LCD_Init(); //串口初始化為115200
- TIM2_Cap_Init(0XFFFF,0); //以1Mhz的頻率計(jì)數(shù)
- TIM3_Cap_Init(0XFFFF,0);
- KEY_Init();
- LCD_ShowString(30,40,200,24,24,"Mini STM32 ^_^");
- LCD_ShowString(30,70,200,16,16,"LIU HONG ZHI");
- LCD_ShowString(30,90,200,16,16,"BIAN MA QI CE SHI");
- LCD_ShowString(30,130,200,12,12,"2018/6/25");
- while(1)
- {
-
- if(TIM2CH1_CAPTURE_STA&0X80)//成功捕獲到了一次高電平
- {
- LCD_ShowxNum(30,180,a,8,24,0);
- TIM2CH1_CAPTURE_STA=0; //開啟下一次捕獲
- }
- if(TIM3CH1_CAPTURE_STA&0X80)//成功捕獲到了一次高電平
- {
- LCD_ShowxNum(30,230,b,8,24,0);
- TIM3CH1_CAPTURE_STA=0; //開啟下一次捕獲
- }
- }
- }
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