新人求助刚接触STM32 做一个开关控制LED灯闪烁调试一直没反应

iamsunny1314 · 发表于 2013-7-9 17:16:11

注：1.有两个灯，PA4    B12，都是低电平点亮
    2.有两个按键，PB8 和 PB9，按下是低电平
    3.程序开始后两个灯常亮，按下按键后熄灭，抬起后继续亮

main.c中

#include "stm32f10x.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_exti.h"

void RCC_Configuration(void) //时钟配置函数
{
   ErrorStatus HSEStartUpStatus;
    //使能外部晶振
   RCC_HSEConfig(RCC_HSE_ON);
   //等待外部晶振稳定
   HSEStartUpStatus = RCC_WaitForHSEStartUp();
   //如果外部晶振启动成功，则进行下一步操作
   if(HSEStartUpStatus==SUCCESS)
   {
     //设置HCLK（AHB时钟）=SYSCLK 将系统时钟进行分频后，作为AHB总线时钟
     RCC_HCLKConfig(RCC_SYSCLK_Div1);
     //PCLK1(APB1) = HCLK/2 将HCLK时钟2分频后给低速外部总线
     RCC_PCLK1Config(RCC_HCLK_Div2);
     //PCLK2(APB2) = HCLK HCLK时钟配置给高速外部总线
     RCC_PCLK2Config(RCC_HCLK_Div1);
     //外部高速时钟HSE 4倍频
     RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_4);
     //启动PLL
     RCC_PLLCmd(ENABLE);
     //等待PLL稳定
     while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
     //系统时钟SYSCLK来自PLL输出
     RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
     //切换时钟后等待系统时钟稳定
     while(RCC_GetSYSCLKSource()!=0x08);
   }
   // 下面这些都是外设总线上所挂的外部设备时钟的配置

   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE);
}

void GPIO_Configuration(void) //GPIO配置函数
{
//GPIO_DeInit(GPIOA);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_4;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode= GPIO_Mode_Out_PP;
GPIO_Init(GPIOA,&GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode= GPIO_Mode_Out_PP;
GPIO_Init(GPIOB,&GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8|GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode= GPIO_Mode_IPU;
GPIO_Init(GPIOB,&GPIO_InitStructure);
}

void EXTI_Config(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
// 管脚选择
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource8);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource9);
// 清除 EXTI线路挂起位
EXTI_ClearITPendingBit(EXTI_Line8|EXTI_Line9);
//
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_Line = EXTI_Line8|EXTI_Line9;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
}

void NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn; // 注意名称是“_IRQn”，不是“_IRQChannel”
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

int main(void)
{
RCC_Configuration();
GPIO_Configuration();
EXTI_Config();
NVIC_Config();

while(1)
{
GPIO_ResetBits(GPIOB,GPIO_Pin_12);
GPIO_ResetBits(GPIOA,GPIO_Pin_4);
}
}