【求助】求帮调试程序有关PWM波、GPIO和if语句

wywei · 发表于 2019-7-30 10:51:35

我写的是如果PC0为高电平 PC2为低电平就发出PWM，但是实际在板子上是实际上PC0和1都为高的时候输出了pwm。。。我找不到写的程序错误在哪。。。
main.c
#include "delay.h"
#include "key.h"
#include "sys.h"
#include "usart.h"
#include "exti.h"
#include "beep.h"
#include "led.h"
#include "timer.h"
int main(void)
{
uint8_t PC0;
uint8_t PC1;
uint8_t PC2;
GPIO_InitTypeDef BreakLock;

delay_init();    //延时函数初始化
BEEP_Init();       //初始化蜂鸣器端口
LED_Init();          //初始化与LED连接的硬件接口
EXTIX_Init();       //初始化外部中断输入

// 将 PC0 配置
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);//使能PORTC时钟
BreakLock.GPIO_Pin  = GPIO_Pin_0;//PC.0 端口配置
BreakLock.GPIO_Mode = GPIO_Mode_Out_PP; //设置成推挽输出
BreakLock.GPIO_Speed = GPIO_Speed_50MHz; //IO口速度为50MHz
  GPIO_Init(GPIOC, &BreakLock);//初始化GPIOC0
GPIO_ResetBits(GPIOC,GPIO_Pin_0);//初始化输出PC0为低电平

  // 将 PC1 配置
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);//使能PORTC时钟
BreakLock.GPIO_Pin  = GPIO_Pin_1;//PC.1 端口配置
BreakLock.GPIO_Mode = GPIO_Mode_Out_PP; //设置成推挽输出
BreakLock.GPIO_Speed = GPIO_Speed_50MHz; //IO口速度为50MHz
  GPIO_Init(GPIOC, &BreakLock);//初始化GPIOC1
GPIO_ResetBits(GPIOC,GPIO_Pin_1);//初始化输出PC0为低电平

  //将 PC2 配置
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);//使能PORTC时钟
BreakLock.GPIO_Pin  = GPIO_Pin_2;//PC.2 端口配置
BreakLock.GPIO_Mode = GPIO_Mode_Out_PP; //设置成推挽输出
BreakLock.GPIO_Speed = GPIO_Speed_50MHz; //IO口速度为50MHz
  GPIO_Init(GPIOC, &BreakLock);//初始化GPIOC1
GPIO_ResetBits(GPIOC,GPIO_Pin_2);//初始化输出PC0为低电平

  //将 PB0 配置成测试用GPIO口
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);//使能PORTC时钟
BreakLock.GPIO_Pin  = GPIO_Pin_0;//PB.0 端口配置
BreakLock.GPIO_Mode = GPIO_Mode_Out_PP; //设置成推挽输出
BreakLock.GPIO_Speed = GPIO_Speed_50MHz; //IO口速度为50MHz
  GPIO_Init(GPIOB, &BreakLock);//初始化GPIOB0
GPIO_ResetBits(GPIOB,GPIO_Pin_0);//初始化输出PB0为低电平
//BEEP=0;暂时没用到蜂鸣器
LED0=1;
LED1=1;//初始化指示灯都是灭的
while(1)
{
  PC0 = GPIO_ReadOutputDataBit(GPIOC,GPIO_Pin_0);
  PC1 = GPIO_ReadOutputDataBit(GPIOC,GPIO_Pin_1);
  PC2 = GPIO_ReadOutputDataBit(GPIOC,GPIO_Pin_2);
  if((PC0 == 1)&&(PC2 ==0))
  {
TIM2_PWM_Init(22500,6400);  //72000000Hz进行6400分频，22500个周期为2秒 PA1输出两秒的脉冲
  }
}
}

exti.c
#include "exti.h"
#include "led.h"
#include "key.h"
#include "delay.h"
#include "usart.h"
#include "beep.h"
void EXTIX_Init(void)
{

EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
KEY_Init();  // 按键端口初始化
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE); //使能复用功能时钟

//GPIOE.3 中断线以及中断初始化配置下降沿触发 //KEY1
GPIO_EXTILineConfig(GPIO_PortSourceGPIOE,GPIO_PinSource3);
EXTI_InitStructure.EXTI_Line=EXTI_Line3;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_Init(&EXTI_InitStructure); //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器
//GPIOE.4 中断线以及中断初始化配置  下降沿触发 //KEY0
GPIO_EXTILineConfig(GPIO_PortSourceGPIOE,GPIO_PinSource4);
EXTI_InitStructure.EXTI_Line=EXTI_Line4;
EXTI_Init(&EXTI_InitStructure); //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器

//GPIOA.0 中断线以及中断初始化配置上升沿触发 PA0  WK_UP
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource0);
EXTI_InitStructure.EXTI_Line=EXTI_Line0;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_Init(&EXTI_InitStructure);  //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器

NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn; //使能按键WK_UP所在的外部中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //抢占优先级2，
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x03;    //子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;       //使能外部中断通道
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn; //使能按键KEY1所在的外部中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //抢占优先级2
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;    //子优先级1
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;       //使能外部中断通道
NVIC_Init(&NVIC_InitStructure);    //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQn; //使能按键KEY0所在的外部中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //抢占优先级2
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;    //子优先级0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;       //使能外部中断通道
NVIC_Init(&NVIC_InitStructure);    //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器

}
//外部中断0服务程序
void EXTI0_IRQHandler(void)
{
delay_ms(10);//消抖
if(WK_UP==1) //WK_UP按键
{
  PCout(0)=!PCout(0);
}
EXTI_ClearITPendingBit(EXTI_Line0);
//清除LINE0上的中断标志位
}

//外部中断3服务程序
void EXTI3_IRQHandler(void)
{
delay_ms(10);//消抖
if(KEY1==0)  //按键KEY1
{
  LED1=!LED1;
  PCout(2)=!PCout(2);
}
EXTI_ClearITPendingBit(EXTI_Line3);  //清除LINE3上的中断标志位
}
void EXTI4_IRQHandler(void)
{
delay_ms(10);//消抖
if(KEY0==0)  //按键KEY0
{
  LED0=!LED0;
  PCout(1)=!PCout(1);
}
EXTI_ClearITPendingBit(EXTI_Line4);  //清除LINE4上的中断标志位
}

timer.c
#include "timer.h"
#include "led.h"
#include "usart.h"
//TIM2 PWM部分初始化
//PWM输出初始化
//arr：自动重装值
//psc：时钟预分频数
void TIM2_PWM_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //使能定时器2时钟
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);  //使能GPIO外设时钟

//设置该引脚为复用输出功能,输出TIM2 CH2的PWM脉冲波形 GPIOA.1
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; //TIM_CH2
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIO
//初始化TIM2
TIM_TimeBaseStructure.TIM_Period = arr; //设置在自动重装载寄存器周期的值
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Down;  //TIM向下计数模式
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TIM2CCR2的输出比较参数
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM脉冲宽度调制模式1
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
TIM_OCInitStructure.TIM_Pulse = 11250;//设置CCR的值 CCR2设置成两秒
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高，CCER中CC1P位设置为1
TIM_OC2Init(TIM2, &TIM_OCInitStructure);  //根据指定的参数初始化外设TIM2 OC2

// TIM_SelectOnePulseMode(TIM2,TIM_OPMode_Single);//选择单脉冲模式

TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);  //使能TIM2在CCR2上的预装载寄存器

TIM_Cmd(TIM2, ENABLE);  //使能TIM3

}