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keypad+lcd

 
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thinkpositivex
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keypad+lcd
PostPosted: Thu Jan 07, 2010 8:09 am     Reply with quote
Hi.....i have a lot of problem,can you all help me
i already simulate the circuit,as shown figure below,im using ccs compiler 4.084.but my problem is why the port of lcd is active low after execute the program.i think the fault is because the keypad and lcd driver is declare at same port,port B and not matching with my connection.i already found how to alter but i.m not understand can you explained more detail how to alter the
lcd driver and import to the coding.

circuit;

Code:

#include <16f877a.h>
#fuses XT,NOWDT,PUT,NOBROWNOUT,NOLVP
#use delay(clock=4000000)

#include <LCD.C>
#include <KBD.C>

void main()
{
   char c;
   lcd_init();
   kbd_init();
   
   while(TRUE)
   {
      c=kbd_getc();
        if(c!=0)
          if(c=='*')
            lcd_putc('\f');
          else
            lcd_putc(c);
   }
}

sorry i cnnot post the schematic diagram,i dont know how to upload the figure in this forum
FvM



Joined: 27 Aug 2008
Posts: 2337
Location: Germany

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PostPosted: Thu Jan 07, 2010 9:13 am     Reply with quote
You should at least list the pin mapping of LCD and keyboard.
thinkpositive
Guest
PostPosted: Thu Jan 07, 2010 10:19 am     Reply with quote
FVM..
Actually I refer the pin mapping from the keypad driver that I have found in this program file driver.

keypad: copy from keypad driver in program files
Code:

#define COL0 (1 << 5)
#define COL1 (1 << 6)
#define COL2 (1 << 7)
#define ROW0 (1 << 1)
#define ROW1 (1 << 2)
#define ROW2 (1 << 3)
#define ROW3 (1 << 4)
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