[SOLVED] PIC complete discussion for all

romel_emperado · Jun 14, 2011

guys, Im a starter of PIC microcontroller.

As I check the Hitech c compiler there are fuse bits settings for WDT, FOSC and ETC.. and then when I look to my programmer software (winPICgm and pony prog) the same settings for config bits are present..

the question is, is it the same if I just make a fuse bit settings during programming the device? I mean I will just write code to my compiler without setting a fuse bits. and set it later in my programming software.(winpicgm and ponyprog,Icprog).?

ckshivaram · Jun 14, 2011

they are same as you have told, but its good practice to do it in the program as we might skip or forget to do the external settings properly.

romel_emperado · Jun 14, 2011

thanks ckshivaram!! You're the best!!

I will study first how to set the fuse bits..if you have any useful links pls share.. Im reading also now..

ckshivaram · Jun 14, 2011

Hi,

this is very good tutorial of hitech - C for pic 18
**broken link removed**

---------- Post added at 10:35 ---------- Previous post was at 10:34 ----------

you can get some download books also here
The PIC Tutorial - Free PIC Books

romel_emperado · Jun 14, 2011

thanks... very nice site.. full of ebooks...

ckshivaram · Jun 14, 2011

also read the help of the hitech C compiler whenever possible.... it has all the information you need.

thanks

romel_emperado · Jun 14, 2011

thanks ckshivaram,

romel_emperado · Jun 14, 2011

I've got this simple code but why there's a warning that is out of date?? what does it mean??

Code C - [expand]
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#include<pic.h>
 
 
void main()
{
   RA2 = 0;
   while(1)
   {
      RA2 = 1;
   }
}

Build C:\users\romel\Desktop\program test\blink-LED.c for device 16F628
Using driver C:\Program Files\HI-TECH Software\PICC\9.80\bin\picc.exe

Make: The target "C:\users\romel\Desktop\program test\blink-LED.p1" is out of date.
Executing: "C:\Program Files\HI-TECH Software\PICC\9.80\bin\picc.exe" --pass1 "C:\users\romel\Desktop\program test\blink-LED.c" -q --chip=16F628 -P --runtime=default --opt=default -D__DEBUG=1 -g --asmlist "--errformat=Error [%n] %f; %l.%c %s" "--msgformat=Advisory[%n] %s" "--warnformat=Warning [%n] %f; %l.%c %s"
Executing: "C:\Program Files\HI-TECH Software\PICC\9.80\bin\picc.exe" -oblink-LED.c.cof -mblink-LED.c.map --summary=default --output=default blink-LED.p1 --chip=16F628 -P --runtime=default --opt=default -D__DEBUG=1 -g --asmlist "--errformat=Error [%n] %f; %l.%c %s" "--msgformat=Advisory[%n] %s" "--warnformat=Warning [%n] %f; %l.%c %s"
(1273) Omniscient Code Generation not available in Lite mode (warning)
HI-TECH C Compiler for PIC10/12/16 MCUs (Lite Mode) V9.80
Copyright (C) 2010 Microchip Technology Inc.

Memory Summary:
Program space used Ah ( 10) of 800h words ( 0.5%)
Data space used 2h ( 2) of E0h bytes ( 0.9%)
EEPROM space used 0h ( 0) of 80h bytes ( 0.0%)
Configuration bits used 0h ( 0) of 1h word ( 0.0%)
ID Location space used 0h ( 0) of 4h bytes ( 0.0%)

Running this compiler in PRO mode, with Omniscient Code Generation enabled,
produces code which is typically 40% smaller than in Lite mode.
See **broken link removed** for more information.

Loaded C:\users\romel\Desktop\program test\blink-LED.c.cof.

********** Build successful! **********

ckshivaram · Jun 14, 2011

can you check the license date or the permissions you have got..

But build is happening.. its just warning.... i feel.. check if the hex code is created.....

romel_emperado · Jun 14, 2011

IM using the new version of MPLAB from microchip.. the hex is generated but not funtioning.. i tested it in proteus..

vinodstanur · Jun 14, 2011

Use
TRISA2=0;
to make RA2 as output.

romel_emperado · Jun 14, 2011

thanks.. it's now working.. what's wrong with declaring specific bit like what I did?

this sample code is now working

Code C - [expand]
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#include<pic.h>
 
 
void main()
{
   TRISB = 0;
   while(1)
   {
      PORTB = 1;
   }
}

---------- Post added at 11:26 ---------- Previous post was at 11:24 ----------

I think I need to declare first TRISB = 0 before I can declare RB2 = 0;

wait I will try..

vinodstanur · Jun 14, 2011

Nothing is wrong, you can use specific bits of a PORT if needed.
If you use TRISB=0;
That means you are setting each bits of TRISB register to 0.
This makes all PORTB bits as output .

If you want to make a single bit say RB0 as output then you can use
TRISB0=0;
or
TRISB=0b11111110;
This details are there in the datasheet.

romel_emperado · Jun 14, 2011

thanks... I think I know a little of using PIC microcontroller... tnx guys... I will practice more..

I tried this code and its working.
.

Code C++ (Qt) - [expand]
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#include<pic.h>
 
 
void main()
{
   
   unsigned int x;
   TRISB = 0x02;
   PORTB = 0x02;
   
  
   while(1)
   {
   
      
      RB0 = 1;
      RB5 = 0;
      for(x=0; x<1000; x++);
      RB0 = 0;
      RB5 = 1;
      for(x=0; x<1000; x++);
      
      if(RB1 = 0)
      RB7 = 1;
      else
      RB7 = 0;
      
   }
}

vinodstanur · Jun 14, 2011

if(RB1==0)

romel_emperado · Jun 14, 2011

yes sorry.. that's typographical error.. hehe

thanks..

---------- Post added at 12:39 ---------- Previous post was at 12:31 ----------

by the way what is the difference if I say

#include"pic.h"
and
#include<pic.h>

the result is the same in the simulation..

ckshivaram · Jun 14, 2011

if you use < > symbol then this file is searched in the complete drive
if you use " " then the header file is searched only in the present working directory......

vinodstanur · Jun 14, 2011

FRIEND,
NO NEED to click 'help' for every post.......okay.:wink:.

romel_emperado · Jun 14, 2011

ckshivaram said:
if you use < > symbol then this file is searched in the complete drive
if you use " " then the header file is searched only in the present working directory......

thanks... I see the difference now..

vinodstanur said:
FRIEND,
NO NEED to click 'help' for every post.......okay.:wink:.

what do you mean by clicking help?

---------- Post added at 12:47 ---------- Previous post was at 12:47 ----------

you mean the thanks button?

---------- Post added at 12:49 ---------- Previous post was at 12:47 ----------

I noticed that the fuse bits of HItech C is not working unless you write directly the fuse bits into your code.. . Isn't it?

ckshivaram · Jun 14, 2011

yes... there is no need to click on helpful button.. if you feel the answered has helped you then you can click... that's what vinodstanur means..........

Code C - [expand]
1 2 3 4 5 6 7 8 9 10 11	#include<pic.h> void main() { RA2 = 0; while(1) { RA2 = 1; } }

Code C - [expand]
1 2 3 4 5 6 7 8 9 10 11	#include<pic.h> void main() { TRISB = 0; while(1) { PORTB = 1; } }

[SOLVED] PIC complete discussion for all

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