Search found 11 matches

Thanks for the examle, my code now looks like this:

#include<16f877a.h>
#fuses xt,noprotect,nowdt
#use delay(clock=4000000)
#include<lcd420.c>
#include<kbd44.c>
...

Hi, thanks so much for your help. I'm kinda getting a lot of errors e.g. retval not declared when there is already a declaration... char retval;

Could you tell me where I could place the code u hav ...

Hi,

I'm having a bit of trouble with this code, basically I want the user to be able to select an option from that given on the screen. The lcd displays the options but its not accepting the input, ...

Yea I think the LCD was 'spewing' characters, but the pull down resistors managed to overcome this problem. I've checked the LCD/PIC connections and they are correct Confused

I've put a pull up r ...

I've managed to get everything working now. The pull-down resistors worked!

On start-up, the screen shows "Ready", If I press 0-9, or A-D, the letters show up on the screen accordingly wh ...

I've changed to pull down resistor, hasn't solved the problem :(

I removed the keypad from the circuit and powered it. Now random characters are still appearing on the screen even without any input ...

Hi Rohit, yea I've tried with and without the semicolon, my original code doesn't have the semicolon anyways.

Ok I've got the resistors in the correct place with 5v and they are all 10k. When I power up, same thing just says "Ready". No action from the keypad, but I know the keypad is 100% working. ...

Right, I see. What I'm missing is the 5v connection.

Also, just to make sure... Physically the resistors are the same right?

Sorry for asking noobish questions Confused

void main()
{
char k=0;

lcd_init();
kbd_init();

lcd_putc("\fReady...\n");

while(1);
.
.
.
}
First, prove that the problem is in the keypad code or hardwa ...

Hi guys, gr8 forum u got here. I've been following and have got lots of help from here. Now I got a small problem and thought maybe you could help me Smile

Parts:
PIC16F877A
20x4 Alphanumeric LCD
4 ...