Welding Lights

/************************************************************
P10=1;
P11=1;
P12=1;
P13=1;****/
/**************************************************************************************

*
```
Timer 0 experiment *

```

Implementation phenomenon: After downloading the program, the D1 light turns on for 1 second and turns off for 1 second. Accurate delay can be achieved by using the internal timer of the microcontroller.
Note: None.
******************************************************************************************/

#include "stc15.h" //This file defines some special function registers of the microcontroller

typedef unsigned int u16; //Declare and define the data type
typedef unsigned char u8;

sbit led=P1^0; //Define P20 port as led
/***********************************************************************************

* Function name: Timer0Init
* Function function: Timer 0 initialization
* Input: None
* Output: None
**********************************************************************************/
void Timer0Init(void) //1 millisecond@30.000MHz
{
AUXR |= 0x80; //Timer clock 1T mode
TMOD &= 0xF0; //Set timer mode
TL0 = 0xD0; //Set timing initial value
TH0 = 0x8A; 0; //Set the initial value of the timing
TF0 = 0; //Clear TF0 flag
TR0 = 1; //Timer 0 starts timing
}

/*******************************************************************************

* Function name: main
* Function function: Main function
* Input: None
* Output: None
***************************************************************************/
void main()
{
P10=0;
P11=0;
P12=0;
P13=0;
P1M0=0x0f;
P1M1=0x00;
Timer0Init(); //Timer 0 initialization
ET0=1;//Turn on timer 0 interrupt enable
EA=1;//Turn on the total interruptwhile
(1);
}

/***********************************************************************************

* Function name: void Timer0() interrupt 1
* Function function: Timer 0 interrupt function
* Input: None
* Output: None
******************************************************************************/
void Timer0() interrupt 1
{
static u16 i;
i++;
if(i==1)
{
i=1;
P10=~P10;
P11=~P11;
P12=~P12;
P13=~P13;
}
}