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#include "timer.h"
#include "led.h"
#include "usart.h"
#include "sys.h"
#include "key.h"
//PWM輸出初始化
//arr：自動重裝值
//psc：時鐘預分頻數
//定時器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時鐘
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能GPIOA時鐘
// RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); //使能GPIOA時鐘
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //PA0 清除之前設置
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
//初始化定時器2 TIM2
TIM_TimeBaseStructure.TIM_Period = arr; //設定計數器自動重裝值
TIM_TimeBaseStructure.TIM_Prescaler =psc; //預分頻器
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //設置時鐘分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上計數模式
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //根據TIM_TimeBaseInitStruct中指定的參數初始化TIMx的時間基數單位
//初始化TIM2輸入捕獲參數
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; //先占優先級2級
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //從優先級0級
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure); //根據NVIC_InitStruct中指定的參數初始化外設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時鐘
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能GPIOA時鐘
// RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); //使能GPIOA時鐘
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; //PA0 清除之前設置
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
//初始化定時器2 TIM2
TIM_TimeBaseStructure.TIM_Period = arr; //設定計數器自動重裝值
TIM_TimeBaseStructure.TIM_Prescaler =psc; //預分頻器
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //設置時鐘分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上計數模式
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根據TIM_TimeBaseInitStruct中指定的參數初始化TIMx的時間基數單位
//初始化TIM2輸入捕獲參數
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; //先占優先級2級
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //從優先級0級
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure); //根據NVIC_InitStruct中指定的參數初始化外設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 ); //使能定時器2
}
u8 TIM2CH1_CAPTURE_STA=0; //輸入捕獲狀態
u16 TIM2CH1_CAPTURE_VAL; //輸入捕獲值
unsigned long a=10000;
//定時器5中斷服務程序
void TIM2_IRQHandler(void)
{
if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)//捕獲1發生捕獲事件
{
if(TIM2CH1_CAPTURE_STA&0X40) //捕獲到一個下降沿
{
TIM2CH1_CAPTURE_STA|=0X80; //標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; //標記捕獲到了上升沿
TIM_OC1PolarityConfig(TIM2,TIM_ICPolarity_Falling); //CC1P=1 設置為下降沿捕獲
}
}
TIM_ClearITPendingBit(TIM2, TIM_IT_CC1|TIM_IT_Update); //清除中斷標志位
}
u8 TIM3CH1_CAPTURE_STA=0; //輸入捕獲狀態
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發生捕獲事件
{
if(TIM3CH1_CAPTURE_STA&0X40) //捕獲到一個下降沿
{
TIM3CH1_CAPTURE_STA|=0X80; //標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; //標記捕獲到了上升沿
TIM_OC1PolarityConfig(TIM3,TIM_ICPolarity_Falling); //CC1P=1 設置為下降沿捕獲
}
}
TIM_ClearITPendingBit(TIM3, TIM_IT_CC1|TIM_IT_Update); //清除中斷標志位
}
#include "led.h"
#include "delay.h"
#include "sys.h"
#include "timer.h"
#include "usart.h"
#include "key.h"
//ALIENTEK Mini STM32開發板范例代碼9
//輸入捕獲實驗
//技術支持：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
extern u16 TIM2CH1_CAPTURE_VAL ; //輸入捕獲值
extern u8 TIM3CH1_CAPTURE_STA; //輸入捕獲狀態
extern u16 TIM3CH1_CAPTURE_VAL ; //輸入捕獲值
extern unsigned long a,b;
int main(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);// 設置中斷優先級分組2
delay_init(); //延時函數初始化
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的頻率計數
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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