Water_pump_code.txt

#include<reg51.h>
#define lcd P1
sbit rs=P3^6;
sbit e=P3^7;

sbit mot=P0^7;

sbit low=P0^0;
sbit mid=P0^1;
sbit high=P0^2;

void delay (int d)
{
	unsigned char i;
	for(;d>0;d--)
	{
		for(i=250;i>0;i--);
		for(i=248;i>0;i--);
	}
}
void cmd (unsigned char c)
{
	lcd=c;
	rs=0;
	e=1;
	delay(5);
	e=0;
}
void display (unsigned char c)
{
	lcd=c;
	rs=1;
	e=1;
	delay(5);
	e=0;
}
void string (char *p)
{
	while(*p)
	{
		display(*p++);
	}
}
void init (void)
{
	cmd(0x38);
	cmd(0x0c);
	cmd(0x01);
	cmd(0x80);
}
void main()
{
	char lowp=0,midp=0,highp=0,ctrl=0;
	P0=0x00;
  init();
	
	/*string("  Electronics  ");
	cmd(0xc0);
	string("      Hub      ");
	delay(3000);*/
	
	cmd(0x80);
	string("  Water Level   ");
	cmd(0xc0);
	string("   controller   ");
	delay(1000);
	
	cmd(0x80);
	string("Level :         ");
	cmd(0xc0);
	string("motor :         ");
	if(low==0)
	{
		mot=1;
	}
  while(1)
	{
		if(low!=lowp)//--------1
		{
			cmd(0x88);
			string("LOW   ");
			cmd(0xc8);
			string("ON ");
			mot=1;
			lowp=low;
			ctrl=0;highp=0;
			//delay(1000);
		}
		else if(mid!=midp)
		{
			cmd(0x88);
			string("MEDIUM");
			midp=mid;
		}
		else if((high!=highp)&& ctrl==0) 
		{
			cmd(0x88);
			string("HIGH  ");
			cmd(0xc8);
			string("OFF");
			mot=0;
			highp=high;
			ctrl=1;
			//delay(100);
		}
	}
}