AVR單片機微秒級和毫秒級延時(shí)函數

//16MHz晶振時(shí)間范圍:1-65535us

void Delay_us(unsigned int us)
{
unsigned int i;
i = us/2;
i--;
asm("nop"); asm("nop");
for(;i!=0;i--)
{
asm("nop");asm("nop");asm("nop");
asm("nop");asm("nop");asm("nop");
asm("nop");asm("nop");asm("nop");
}

}

//16MHz晶振時(shí)間范圍:1-65535ms

void Delay_Ms(unsigned int t)
{
for(;t>0;t--)
Delay_us(1100);
}