This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.
#include "SWM221.h"
/* 注意：EnterSleepMode() 必须在RAM中执行，Keil下实现方法有：
方法一、Scatter file
方法二、code_in_ram.c 上右键 =》Options for File "code_in_ram.c" =》Properties =》Memory Assignment =》Code/Conts 选择 IRAM1
*/
void EnterSleepMode(void)
{
volatile int i;
SYS->SLEEP |= (1 << SYS_SLEEP_SLEEP_Pos);
while((SYS->PAWKSR & (1 << PIN4)) == 0)
__NOP();
}
SYS->PAWKSR |= (1 << PIN4); //清除唤醒状态
for(i=0;i<1000;i++)//等待FLASH唤醒,至少需要20uS.