PIC10F202 single-chip dual-color headlight control source program

The two-color car light GP2 made by PIC10F202 is used for switch detection. GP0 and GP1 control two LEDs respectively. When powered on, the GP0 pure white lamp bead lights up. When the switch is powered off once, it switches to the GP1 warm white lamp bead. When the switch is powered off again, it flashes alternately.

The microcontroller source program is as follows:

#include

__CONFIG(0X010);

#define uchar unsigned char

#define uint unsigned int

#define TIME_MAX 1000

uint key2_time_cnt; //key debounce counter

uchar num;

uchar key_flag; 

void Delay_mS(uint n)

{

  uint j;

  uchar k;

    for(j=0;j      for(k=246;k>0;k--)

       NOP();

}

void key_scan()

{

   if(GP2==0) //button pressed

    {

       while(key2_time_cnt!=TIME_MAX)

        {       

          key2_time_cnt++;

        }

       key_flag=1;

     }

    else

     {

        key2_time_cnt=0;

        if(key_flag==1)

          {

            key_flag=0;

            num++;

            if(num>2)

             num=0;

          }

     }  

}

void main()

{

   TRISGPIO=0b00000100;

   GP0=1;

   GP1=0;

   while(1)

    {

      key_scan();     

      switch(num)

       {

        case 0: GP0=1; // white light is on

                 GP1=0; break;

        case 1: GP0=0;

                 GP1=1;break;//Huang Guangliang

        case 2: GP0=0;

                 GP1=1;

                 Delay_mS(5);

                 GP0=1;

                 GP1=0;

                 Delay_mS(5);break; //Alternate flashing              

       } 

    } 

}