[SOLVED] PIC complete discussion for all

[romel_emperado]

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]

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]

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]

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]

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

 

[ckshivaram]

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

thanks

 

[romel_emperado]

thanks ckshivaram,

 

[romel_emperado]

I've got this simple code but why there's a warning that is out of date??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Make: The target "C:\users\romel\Desktop\program test\blink-LED.p1" is out of date.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]

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]

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

 

[vinodstanur]

Use
TRISA2=0;
to make RA2 as output.

 

[romel_emperado]

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]

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]

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]

if(RB1==0)

 

[romel_emperado]

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]

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]

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

 

[romel_emperado]

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..

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]

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..........