关于STM8L101外部中断换醒的问题

只看该作者 · 2013-7-28 21:30

请问一下香主，STM8L101这款IC在外部中断换醒时的问题：

同时使能PA2,PA3, PB1作为外部中断源输入，只有PA3和PB1能够将单片机从HALT 模式中换醒，PA2能够进入中断服务程序，却不能换醒MCU
请帮忙分析一下是什么原因呢？

PA_CR2 =0x0c; //enable PA2,3 as extern interrupt input
PB_CR2 |=0x02; //enable PB1 as extern interrupt input

EXTI_CR1 = 0x58; //setup PA2,PA3 as Rising edge interrupt; PB1 as Falling edge interrupt

ENTERSLEEP_HALT_MODE(); //enter "halt"mode

EXTI_CR1 &=~ 0x50;
PA_CR2 &=~0x0C; //disable PA2,3 extern interrupt input
PA_DDR &= ~0x0C;

PB_CR2 &=~0x02; //disable Pb1 extern interrupt input
PB_DDR &= ~0x02;

只看该作者 · 2013-7-28 21:32

@far @interrupt void PB1_INT_IRQHandler(void)
{

if((EXTI_SR1&0x02)==0x02)
EXTI_SR1 |=0x2;

}

@far @interrupt void PA2_INT_IRQHandler(void)
{

DISABLE_GLOBLE_INT();
if((EXTI_SR1&0x04)==0x04)
EXTI_SR1 |=0x04;

ENABLE_GLOBLE_INT();

}

@far @interrupt void PA3_INT_IRQHandler(void)
{

DISABLE_GLOBLE_INT();
if((EXTI_SR1&0x08)==0x08)
EXTI_SR1 |=0x08;
ENABLE_GLOBLE_INT();
}