Search found 20 matches

Thanks PCM Programmer, I found the solution, it was the wire, I have 16 PCB, with 7 segments x 12 LED's each segment, so I wasn’t working in a PCB, they were wired one by one with wire, so I was usi ...

Hi PCM Programmer, I have used this code to handle 10 seven segments displays, and I make a entire system and it work ok, so I am making a second system, this time it has only 8 displays, but it is wo ...

Yep, this is the code I needed. thanks men it works great.

PS. I moved the lcd instructions from the isr, but actually i don't think that this were important, but just for the flys as we say in Mex ...

Hi:

I have a doubt, I have been working with PICs, and sometimes I use crystal as oscillator, other times I use the internal oscillator, and actually I have never used the crystal for any specific ...

I found out this kind of problems before I post my question, but think that some body (in special PCM programmer) could help me.

Well any way, I can't return this board, it was bought by my compa ...

Some body know how to use the LCD in a PICDEM 4 boar, it has a 16lf72 as a I/O expander connected to a 2x16 parallel LCD, but i don't know how it works, and this 16lf72 can't be read o reprogrammed.

It's a little embarrassing, but i have a little doubt, i have worked with LCD, and after many mistakes and tests, I know how to work with them, but i still don't know why pins D0-D3 don't are used, or ...

Ok, i get it, i made the change, but regarding the other seccion of your answer:

Look in the A/D section of the 18F4420 data sheet. What clock divisor
does it say to use for 4 MHz operation ?
...

OK, I post a bad version of may software, sorry , the #use delay is 8000000 as in the setting of the internal oscillator.

The datasheet says that I must use an 8TOSC, but I don’t understand that. ...

I have a little problem, I connected an LCD with a 18f4420 , I just tried to emulate a digital voltmeter.

It works, but with some inconsistencies, I mean, it shows a measure, but it changes in a r ...

try this

void main()
{
int1 i=0;
setup_counters (RTCC_INTERNAL,RTCC_DIV_2);
output_high(PIN_A1);
delay_ms(500);
output_low( PIN_A1); //----- ...

PCM programmer my version is 4.013.

The LCD is working now, but shows blocks that I don’t send, it seems to
be a trouble with the \n (i don't know how to say in English, in Spanish is
car retu ...

You mean pins D0 to D3.
Leave them unconnected. The LCD has internal pull-ups on the data
pins, so it's no problem.

Yes I meant that. An thanks I didn't know about those internal pull-ups.

...

Your schematic has different wiring, compared to the board photos.
In the schematic, the R/W pin on the LCD is connected to ground.
But on your actual board, it's connected to a PIC pin. But that ...

I've tried to modify this delay(and others), but it didn't work.

I have created myspace to post some pictures, check them please, perhaps i didn't notice something wrong with my conections.

ht ...