common.c

單片機實現短信收發程序

//毫秒为单位，8MHz为主时钟
void Delay_ms(unsigned long nValue)
{
    unsigned long nCount;
    int i;
    unsigned long j;
    nCount = 2667;
    for(i = nValue;i > 0;i--)
    {
    	for(j = nCount;j > 0;j--);
    }
    return;
}
//微秒为单位，8MHz为主时钟
void Delay_us(unsigned long nValue)
{
    int nCount;
    int i;
    int j;
    nCount = 3;
    for(i = nValue;i > 0;i--)
    {
    	for(j = nCount;j > 0;j--);
    }
    return;
}