求助2：1毫秒定时器运行不正确
跟着冲哥视频学，没跟上，不知道是哪的问题，灯闪的频繁很快，没有达到300ms的需求，闪的太快了，先谢谢老师了
#include "AI8051U.h"
#include "stc32_stc8_usb.h" //调用头文件
#include "intrins.h"
#define u8 unsigned char //8位无符号变量（0-255）
#define u6 unsigned int //16位无符号变量（0-65535）
u8 led1=0;
u8 led2=0;
u8 led3=0;
u8 i;
//u8 state={1,2,3,4,5,6,7,8,9,10}; //运行状态
u16 count_ms={0,0,0};
char *USER_DEVICEDESC = NULL;
char *USER_PRODUCTDESC = NULL;
char *USER_STCISPCMD = "@STCISP#";
void Timer0_Init(void) //1毫秒@24.000MHz
{
AUXR &= 0x7F; //定时器时钟12T模式
TMOD &= 0xF0; //设置定时器模式
TL0 = 0x30; //设置定时初始值
TH0 = 0xF8; //设置定时初始值
TF0 = 0; //清除TF0标志
TR0 = 1; //定时器0开始计时
ET0 = 1; //使能定时器0中
}
//Main 主函数***********************
void main(void)
{
WTST = 0; //设置程序指令延时参数，赋值为0可将CPU执行指令的速度设置为最快
EAXFR = 1; //扩展寄存器(XFR)访问使能
CKCON = 0; //提高访问XRAM速度
P0M0 = 0X00; P0M1 = 0X00;
P1M0 = 0X00; P1M1 = 0X00;
P2M0 = 0X00; P2M1 = 0X00;
P3M0 = 0X00; P3M1 = 0X00;
P4M0 = 0X00; P4M1 = 0X00;
P5M0 = 0X00; P5M1 = 0X00;
P6M0 = 0X00; P6M1 = 0X00;
P7M0 = 0X00; P7M1 = 0X00;
P40 = 0;
usb_init(); //初始化USB CDC 接口配置
Timer0_Init(); //调用定时器函数（定时器初始化）
IE2 |= 0x80; //使能USB中断
EA = 1; //打开总中断
while(1) //一直执行
{
P20 = 0;
if (bUsbOutReady)
{
usb_OUT_done();
}
}
}
void Timer0_Isr(void) interrupt 1 //定时器0中断，3秒执行一次
{
for(i=0;i<3;i++)
{
count_ms++;
}
if (count_ms >= 300);
{
count_ms = 0;
led1 = !led1;
P21 = led1;
}
}
https://www.stcaimcu.com/data/attachment/forum/202501/25/111505iie7ia29bj2niinl.png
https://www.stcaimcu.com/data/attachment/forum/202501/25/111505xhezvxyhngq9gkdq.png
<p>count_ms++;</p>
<p>count_ms ++;</p>
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