Keil 4.0, 定时器debug

li7032

求教大侠，定时器程序如下，各变量均正确声明：

1. <div>void main()</div><div>{</div><div>unsigned char counter=0;</div><div>ENLED =0; ADDR0 =0; ADDR1 =1;</div><div>ADDR2 =1; ADDR3 = 1; LED =1;</div><div>TMOD =0X01;//设置定时器T0模式为01</div><div>TH0 = 0XB8;</div><div>TL0 = 0x00;  //定时器赋值</div><div>TR0 = 1; //打开定时器T0</div><div>while(1)</div><div>{</div><div>if(TF0 ==1)</div><div>{</div><div>TF0 =0;</div><div>TH0=0x8b;</div><div>TL0 =0x00;</div><div>counter++;</div><div>if(counter ==50) //计算50次</div><div>{</div><div>counter =0; // 计数器清零</div><div>LED != LED; //取反操作</div><div>}</div><div>}</div><div>}</div><div>}</div>

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程序编译无错误，没有警告，进入debug状态时，不管是按下F5键，还是单步执行F11键，因为定时器不运行，没有溢出产生，停在if(TF0 ==1)语句，程序不进入计时状态，请问有什么办法？谢了！

li7032

void main() { unsigned char counter=0; ENLED =0; ADDR0 =0; ADDR1 =1; ADDR2 =1; ADDR3 = 1; LED =1; TMOD =0X01;//设置定时器T0模式为01 TH0 = 0XB8; TL0 = 0x00;  //定时器赋值 TR0 = 1; //打开定时器T0 while(1) { if(TF0 ==1) { TF0 =0; TH0=0x8b; TL0 =0x00; counter++; if(counter ==50) //计算50次 { counter =0; // 计数器清零 LED != LED; //取反操作 } } } }

PuZong_WZT

li7032 发表于 2016-9-19 09:43
void main() { unsigned char counter=0; ENLED =0; ADDR0 =0; ADDR1 =1; ADDR2 =1; ADDR3 = 1; LED =1; TM ...

中断允许寄存器IE中T0中断控制位和总中断控制位EA没有打开，最后一个语句LED!=LED应该改为LED=~LED

li7032

PuZong_WZT 发表于 2016-9-20 06:59
中断允许寄存器IE中T0中断控制位和总中断控制位EA没有打开，最后一个语句LED!=LED应该改为LED=~LED

多谢高手指点，非常感谢。