Search found 16 matches

hi,all,
Thank you ver much. I found that some clock cycles were missed as too many things were done inside the interrupt function. Now I can get the data correctly. But when I try using anoth ...

hi,all
I am doing a PS2 keyboard interfacing project with the microcontroller but meet some strange problems:

1. It usually sends out two or three bytes when a key is pressed, but none of them ...

Thank you very much for the solutions.
BTW, the PCM compiler I used is quite old. Right now I am not able to check out its version.

hi,all
I wrote a program to interface a keyboard and LCD. I created an array of charactes whose length is 128. After clicking "build all", it said that there is not enough RAM for variables. D ...

hi, Douglas,
Thanks a lot for your reply. Could you please explain in more details, as I don't understand it very well?? Do you mean PCW v3.094 cannot be used to do any I/O function for 16xxx or 1 ...

I did copy and paste, but I also noticed that in the end of the memory, it is written that "ADDLW 0xff ". Not only that, but also in the PCW's program memory, the processor never touches the PORTB reg ...

hi, all,
I am using PCM and PCW to compile the same program but have different outputs.

With the C program:

//
#include <16f877.h>

#use delay (clock=20000000)
#fuses HS, NOWDT, ...

hi, all,
With the same C program:
//
#include <16f877.h>

#use delay (clock=20000000)
#fuses HS, NOWDT, PUT, NOBROWNOUT, NOLVP, PROTECT

void main(){

//set_tris_b(0x00); ...

When I changed Port B to C, it still doesn't work.
Now I am using PCM, there is no problem.
But the problem is that I need to program PIC18F8720 in the project, although the C program would be almos ...

I am using the Demo board from Microchip, so there should not be any problem with hardware, i think.
In fact, when I use another compiler, PCM, it works.

thank you in advance.
I'll wait for your reply

It still doesn't work
I have checked the program memory selection. Under the self-selection mode, it programs from 0x0 to 0xB only. How come?
Then I use the manual selection and change it to full ra ...

hi, all,
I use PCW 3.094 and MPLAB 6.40 to program PIC16F877. The program is very simple:
//
#include <16f877.h>

#use delay (clock=20000000)
#fuses HS, NOWDT, PUT, NOBROWNOUT, NO ...

When I removed the "printf" statements, it still failed to load the .cof file.
But as I right clicked the c file and changed the Debug Option to "none", it became "failed to load the .cod file" inste ...

When I did what you have done, ie, right clicking the c file and changing the debug option, it said "failed to load .cod file" instead.
Strange. Anyone knows why??