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大虾，帮我看看中断是怎么实现的，我怎么看不出来，多谢了！
/*******************普中科技 www.prechin.com**********************************
*
* STM32中断实验
*
* 实验目的： 掌握中断的配置
* 连接方法： 用排线或杜邦线分别连 JP10--JP1 JP11--JP5
* 实验现象： 当K7按下LED灯 再按时，LED灯会熄灭
*
*******************************************************************************/
#include "stm32f10x_lib.h"
unsigned char Disp_Tab[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40}; //段码控制
//此表为8个数码管位选控制, 共阴数码管 1-8个 -
unsigned char dispbit[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdF,0xbF,0x7F}; //位选控制 查表的方法控制
unsigned int LedOut[10];
u8 t=0;
/******************************** 变量定义 ------------------------------------*/
EXTI_InitTypeDef EXTI_InitStructure;
ErrorStatus HSEStartUpStatus;
/*********************************声明函数 -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
void Delay(vu32 nCount)
{
for(; nCount != 0; nCount--);
}
/*******************************************************************************
*
* 主函数
*
*******************************************************************************/
int main(void)
{
u8 i=0;
#ifdef DEBUG
debug();
#endif
RCC_Configuration(); //系统时钟配置
NVIC_Configuration(); //NVIC配置
GPIO_Configuration(); //配置GPIO
///*将EXTI线6连接到PB6*/
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource6);
/* Configure Key Button EXTI Line to generate an interrupt on falling edge */
//配置按钮中断线触发方式
EXTI_InitStructure.EXTI_Line = EXTI_Line6;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //下降沿触发
EXTI_InitStructure.EXTI_LineCmd = ENABLE; //中断线使能
EXTI_Init(&EXTI_InitStructure); //初始化中断
/* Generate software interrupt: simulate a falling edge applied on Key Button EXTI line */
EXTI_GenerateSWInterrupt(EXTI_Line6);
while (1)
{
if(t>100000000)t=0;
LedOut[7]=t%100000000/1000000;
LedOut[6]=t%10000000/100000;
LedOut[5]=t%1000000/100000;
LedOut[4]=t%100000/10000;
LedOut[3]=t%10000/1000;
LedOut[2]=t%1000/100;
LedOut[1]=t%100/10;
LedOut[0]=t%10;
for(i=0; i<8; i++)
{
GPIO_Write(GPIOA , LedOut ) ;
for( i=0; i<8; i++)
{
GPIOA->BSRR = LedOut & 0x00FF;
GPIOA->BRR = (~(LedOut<<8)) & 0xFF00;
// GPIOA->BSRR = dispbit & 0x00FF;
//GPIOA->BRR = (~dispbit) & 0x00FF;
Delay(200);
}
}
}
}
/*******************************************************************************
*
* RCC配置
*
*******************************************************************************/
void RCC_Configuration(void)
{
//复位RCC外部设备寄存器到默认值
RCC_DeInit();
//打开外部高速晶振
RCC_HSEConfig(RCC_HSE_ON);
//等待外部高速时钟准备好
HSEStartUpStatus = RCC_WaitForHSEStartUp();
//外部高速时钟已经准别好
if(HSEStartUpStatus == SUCCESS)
{
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
FLASH_SetLatency(FLASH_Latency_2);
//配置AHB(HCLK)时钟=SYSCLK
RCC_HCLKConfig(RCC_SYSCLK_Div1);
//配置APB2(PCLK2)钟=AHB时钟
RCC_PCLK2Config(RCC_HCLK_Div1);
//配置APB1(PCLK1)钟=AHB 1/2时钟
RCC_PCLK1Config(RCC_HCLK_Div2);
//配置ADC时钟=PCLK2 1/4
RCC_ADCCLKConfig(RCC_PCLK2_Div4);
//配置PLL时钟 == 外部高速晶体时钟*9
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
//配置ADC时钟= PCLK2/4
RCC_ADCCLKConfig(RCC_PCLK2_Div4);
//使能PLL时钟
RCC_PLLCmd(ENABLE);
//等待PLL时钟就绪
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
//配置系统时钟 = PLL时钟
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
//检查PLL时钟是否作为系统时钟
while(RCC_GetSYSCLKSource() != 0x08)
{
}
}
/* Enable Key Button GPIO Port, GPIO_LED and AFIO clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_GPIOB
| RCC_APB2Periph_AFIO, ENABLE);
}
/*************************************************
函数: void GPIO_Config(void）
功能: GPIO配置
**************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
//GPIO_InitTypeDef GPIO_InitStructure;
GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //引脚频率50M
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输入
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //配置浮空输入
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
/*******************************************************************************
* Function Name : NVIC_Configuration
* Description : Configure the nested vectored interrupt controller.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
#ifdef VECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); //分配中断向量表
#else /* VECT_TAB_FLASH */
/* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
/* Configure one bit for preemption priority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); //设置中断优先级
/* Enable the EXTI9_5 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQChannel; //中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //强占优先级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;//次优先级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //通道中断使能
NVIC_Init(&NVIC_InitStructure);//初始化中断
}
#ifdef DEBUG
/*******************************************************************************
* Function Name : assert_failed
* Description : Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* Input : - file: pointer to the source file name
* - line: assert_param error line source number
* Output : None
* Return : None
*******************************************************************************/
void assert_failed(u8* file, u32 line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
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发表于 2012-11-14 14:38:49
楼主
发表于 2012-11-14 15:24:54
