key.c

来自「小区巡检系统,MSPF437,里面主要参考的内容为TI单片机的低功耗处理,仅供参」· C语言 代码 · 共 38 行

#include "key.h"
#include "hal.h"
#include "pub_func.h"
#include "sys_event.h"

/* key down detect
*/
void key_down_detect(void)
{
    unsigned char ii;
    
    _delay(0xFF);
    for(ii=0;ii<0x20;ii++)
    {
        if(KEY_IN&KEY)
        {
            return;
        }
        _delay(2);
    }
    _sys_evt_add(SYS_EVT_CARD);
}

/* wakeup system every second
*/
#pragma vector=PORT1_VECTOR
__interrupt void _port1_int(void)
{
    // clear interrupt flag
    KEY_IFG&=~(KEY);
    //event
    SYS_EVT_ADD(SYS_EVT_KEYDOWN);
    // Clear LPM3 bits from saved SR on Stack
    _BIC_SR_IRQ(LPM3_bits);
}