|
在进行STM32程序调试时,发现按下中断按键时,程序始终停在一个状态(LED1亮/灭),不知道在中断时为什么会出现这样的现象,各位大侠帮帮忙,万分感谢。 程序代码如下:
#include "stm32f10x_lib.h"
GPIO_InitTypeDef GPIO_InitStructure; EXTI_InitTypeDef EXTI_InitStructure; NVIC_InitTypeDef NVIC_InitStructure;
/* Private function prototypes -----------------------------------------------*/ void GPIO_Configuration(void); void NVIC_Configuration(void); void Delay(vu32 nCount); /* Private functions ---------------------------------------------------------*/
int main(void) { //SystemInit();
GPIO_Configuration();
NVIC_Configuration();
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Connect EXTI Line0 to PA.0 */ GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);
/* Configure EXTI Line0 to generate an interrupt on falling edge */ EXTI_InitStructure.EXTI_Line = EXTI_Line0; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure);
// PWR_EnterSTOPMode(PWR_Regulator_ON, PWR_STOPEntry_WFI);
while(1) { GPIO_SetBits(GPIOA, GPIO_Pin_1);//点亮LED Delay(0x3ffff); //延时 GPIO_ResetBits(GPIOA, GPIO_Pin_1);//关闭LED Delay(0x3ffff); //延时 } }
void GPIO_Configuration(void) { RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 ; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //带上拉输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //输出频率最大50M GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //选择引脚0 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮点输入 GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化PA0引脚 }
void NVIC_Configuration(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
/* Configure one bit for preemption priority */ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); /* Enable the EXTI0 Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQChannel; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); }
void Delay(vu32 nCount) { for(; nCount != 0; nCount--); } 在文件“stm32f10x_it.c”中,按下中断按键时可以进入 void EXTI0_IRQHandler(void) { // GPIO_SetBits(GPIOA, GPIO_Pin_1);//点亮LED2 } 此函数,但继续运行就不到跑哪里去了,头真晕啊~~~·
|
|