Question

下面c语言程序是关于单片机pwm调光的，请讲一下程序流程和具体功能，怎么实现调光的，越详细越好

void Initial_timer(void)
{
TMOD = 0x01;
TH0 = (65536-10) / 256; //period
TL0 = (65536-10) % 256;
TR0 = 1;
ET0 = 1;
EX0 = 1; EX1 = 1;
IT0 = 1; IT1 = 1;
EA = 1;
a = 0;
b=250;
}

void time0() interrupt 1
{

TL0 = (65536-10) % 256;
TH0 = (65536-10) / 256;
a++;

if(a == 85) a = 0;
if(a > b) P1 = 0xff;
else P1 = 0x00;

flag=0;
}

Answer 1

看单片机的寄存器的说明

void Timer0Init(void) //100微秒@11.0592MHz
{
AUXR |= 0x80; //定时器时钟1T模式
TMOD &= 0xF0; //设置定时器模式
TL0 = 0xAE; //设置定时初值
TH0 = 0xFB; //设置定时初值
TF0 = 0; //清除TF0标志
TR0 = 1; //定时器0开始计时
}