Paul & Lynn Tyrer escreveu:
> Just to update, I am hopelessly new and lost. I was a VB basic guy years =
ago
> and remember a little of what I need to do but not a lot.
> I know I will need a place to store the count, and will have a call list =
up
> to 50 so when the count equals 10 I will have a call to put 1+0 on the
> screen.
> How do I :
> Create a place to store the count.
> Increment 1 to this count when the state changes
> compare the stored count so when it equals 50 I increment the lcd by 1
>
> I was hoping to find a piece of code out there in Google land to help me =
but
> as of yet I have not been successful. However I do feel a sense of
> achievement coming this far.
>
> Any help is of course appreciated.
>
> Thanks
>
> Paul
>
>
>
> Hi all.
> I am trying to make a switch counter that would put on the lcd screen how
> many times /50 the switch has been opened/closed.
>
> I purchased the Book PIC In Practice and have been successful in building
> the LCD circuit 2x20 and able to put the words I need to the screen. (aft=
er
> spending hours trying to get it to work)
>
> What I need and am hopelessly lost at this point, is to count the switch =
on
> A0 and put the amount on to the screen. using the lcd Code in the above
> book.
>
> I beg you, this is not for any other purpose than to count the water gall=
on
> usage in my house using a hall effect switch on the meter.
>
> Can anyone help me with code/ suggestions etc
>
> Thanks in advance
>
> Paul
>   =


It would be better if you start by telling what language you are using.

I know there are some BASIC compilers for PIC. If you are struggling =

with assembly, I would suggest you to switch to BASIC or C.


Best regards,

Isaac


PS.: The code below (in Hi-Tech C) should do what you need. There are
free versions of the Hi-Tech PICC available.
If you need any help, please say so.

#include <pic.h>
#include <stdio.h>

void LCDInit( void )
{
// put your LCD initialization code here
}

void putch( char c )
{
// put your code to show one character on LCD here
}

void clrscr( void )
{
// put your code to clear the LCD here
}

void delay_ms( unsigned short t )
{
    unsigned short i;

    for( ; t; t-- )
    {
        for( i =3D 100; i; i-- )
        {
        // put code to waste slightly less than 10us here.
        // You could test in the simulator and modify until each
iteration of
        // the outer loop takes the closest possible time to 1ms.
        }
    }
}

#define SENSOR RB0 /* or whatever other pin you want to use */

void main( void )
{
    unsigned short Count =3D 0;

    // put the code to initialize the MCU and I/Os here;

    LCDInit();

    while( 1 )
    {
        clrscr();
        printf( "Value: %5u", Count );
        while( SENSOR =3D=3D 0 )
            CLRWDT();
        delay_ms( 1 );
        while( SENSOR !=3D 0 )
            CLRWDT();
        delay_ms( 1 );
        Count++;
    }
}
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