遇到了一个问题，请各位大神看下。
主函数中，在while循环时，不论我按何时下按键中断，总是在循环显示（SendGroupData_TA6932该函数是去控制数码管显示）结束后，才进入外部中断函数，百思不得其解呀！！！
难道普通的delay函数比外部中断的优先级高吗？？？？？？？？
还请各位大神指导下
uint8_t key1_int_flag = 0;//按键中断标志位
delay函数void Delay( uint32_t count)
{
for(;count!=0;count--);
}
void EXTI7_GPIOB7_Config(void)；
void key_steup_scan(void);//按键设置函数，按键按下后才进入此函数
void SendGroupData_TA6932(unsigned char addr,unsigned char* arr,unsigned char len)；//发送显示内容到TA6932
主函数大致如下：
main（）
{
EXTI7_GPIOB7_Config()；
while(1)
{
if(key1_int_flag == 1)
{
key_steup_scan();
}
else
{
SendGroupData_TA6932(0,TA6932_Data_Un,9);
Delay(0xFFFFFF);
SendGroupData_TA6932(0,TA6932_Data_An,9);
Delay(0xFFFFFF);
SendGroupData_TA6932(0,TA6932_Data_Tem,9);
Delay(0xFFFFFF);
}
}
}
//中断配置函数
void EXTI7_GPIOB7_Config(void)
{
NVIC_InitTypeDef NVIC_InitStruct;
GPIO_InitTypeDef GPIO_InitStruct;
EXTI_InitTypeDef EXTI_InitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
//EXTI9_5中断配置，按键1
NVIC_InitStruct.NVIC_IRQChannel = EXTI9_5_IRQn;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);
//配置按键引脚
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_7;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource7);
EXTI_InitStruct.EXTI_Line = EXTI_Line7;
EXTI_InitStruct.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStruct.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStruct.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStruct);
}
//中断函数
void EXTI9_5_IRQHandler(void)
{
if(EXTI_GetFlagStatus(EXTI_Line7)!=RESET)
{
if(key1_int_flag == 0)
{
key1_int_flag = 1;
}
else
{
key1_int_flag =0;
}
EXTI_ClearITPendingBit(EXTI_Line7);
}
} |
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