Changing the hex code - Electronic Circuits Projects Diagrams Free

anthony123 · 6th January 2008, 10:05 PM

Hi, i'm trying to put my name (anthony) into this air display but i cant

I do it with autor's page code and works excellent!!!!
Thankss

jpanhalt · 6th January 2008, 11:00 PM

Why not just modify the code under "algorithm" and re-compile? John

anthony123 · 7th January 2008, 01:38 PM

The problem is: i dont know re-copiler. Do you can say me what are the rigth tools to do that? Pls help me... i wanna learn about copilation process...

ericgibbs · 7th January 2008, 01:58 PM

Quote:

Originally Posted by anthony123

The problem is: i dont know re-copiler. Do you can say me what are the rigth tools to do that? Pls help me... i wanna learn about copilation process...

A free assembler is available at www.microchip.com its the MPLAB IDE7.xx.

http://www.microchip.com/stellent/id...&part=SW007002

Download and install into your PC, use the Help files in the MPLAB.

jpanhalt · 7th January 2008, 02:01 PM

There seem to be two choices to do what you want to do: 1) Edit the hex code directly; or
2) Edit the source code ("algorithm") and compile to give new hex code.

The first choice in my view is much more difficult, particularly if you are not familiar with coding. You have to use a hex editor, not a text editor. If you use a text editior, it may seem to work from what you see on the screen, but it won't work when you try to re-program the chip. I have used a hex editor couple of times in my work when I did not have access to the source code, but I did have access the hex code. In fact, I did essentially what you are trying to do, namely change the names of some variables. However, as I just stated, it would not be my first choice, since the source code is available in the "algorithm."

The second choice is easiest. The steps in the algorithm that spell out the greeting can simply be change to other letters to spell anything you want. Then when you program the chip the language of the "algorithm" will be converted to hex code by the compiler.

I cannot get much more detailed than that without know what you have for a programmer and whether you are familiar with assembler (assembly) language.

John

**Nigel Goodwin** · 7th January 2008, 02:20 PM

Quote:

Originally Posted by jpanhalt

The first choice in my view is much more difficult, particularly if you are not familiar with coding. You have to use a hex editor, not a text editor.

Not true, a HEX file is just a standard ASCII text file, Notepad is all you need to edit it - a HEX editor would offer no advantage, and probably put disadvantages in your way?.

However, it's a SERIOUSLY bad idea, you first have to understand fully how a HEX file is constructed (it's explained in the MPASM helpfile), and then how to create the values for one, including the correct checksum value.

Far, far easier to load it in MPLAB and alter the source code, then re-assemble it.

You could also load the HEX file in WinPicProg, and manually edit the HEX files there - as it's displayed as pure machine code, bit for bit, rather than the Intel HEX file format.

But re-assembling the source is the way to go! - if you can't do that, you can't do the other options as they are more difficult.

jpanhalt · 7th January 2008, 02:43 PM

Quote:

Originally Posted by Nigel Goodwin

Not true, a HEX file is just a standard ASCII text file, Notepad is all you need to edit it - a HEX editor would offer no advantage, and probably put disadvantages in your way?.

My error, I was just speaking from experience. The program was on floppy and the instrument used a PC, not a microcontroller. The file was an *.exe extension. My first attempt used Notepad on the assumption it was just ASCII. But that totally flopped. Of course, there were lots of nonsense characters. I used a hex editor freedbie, made the same changes to the characters, and it worked. Somewhat later, I read that one could not simply edit an exe file with Notepad and expect it to work.

I certainly defer to your experience and suspect I made an incorrect leap in assuming the exe was simply a hex file. Thank you for the correction. John

anthony123 · 7th January 2008, 05:02 PM

Well i have MPLAB but i dont know use it!!! Can you guide me saying me few importants steps??

anthony123 · 7th January 2008, 05:14 PM

will be something like this???

Code:

; name    : JP6293E
; author  : Anthony Sotillet
; date    : 07/01/08

; Microcontroller:  12f629 Speed: 4 Mhz Internal RC

delay 200 miliseconds
Set Comparator Mode 7


variable byte f = 00000000b   ; Output data
variable byte s                  ; Temporal variable
variable byte o                  ; message number.

procedure salida( s as byte ) is
gpio = s
delay 500 us
gpio = 00000000b
delay 200 us         
end procedure

procedure disp ( f as byte ) is
if f = "0" then f = "O" 
if f = "A" then
   salida(0011_0110)
   salida(0000_0101)
   salida(0000_0101)
   salida(0011_0110)
end if
if f = "H" then
   salida(0011_0111)
   salida(0000_0100)
   salida(0000_0100)
   salida(0011_0111)
end if
if f = "N" then
   salida(0011_0111)
   salida(0000_0010)
   salida(0000_0100)
   salida(0001_0000)
   salida(0011_0111)
end if
if f = "O" then
   salida(0001_0110)
   salida(0010_0001)
   salida(0010_0001)
   salida(0001_0110)
end if
if f = "T" then
   salida(0000_0001)
   salida(0011_0111)
   salida(0000_0001)
end if
if f = "Y" then
   salida(0000_0001)
   salida(0000_0010)
   salida(0011_0100)
   salida(0000_0010)
   salida(0000_0001)
end if
if f = "h" then         ; 'h' lowercase = Hearth character
   salida(0000_0010)
   salida(0000_0111)
   salida(0001_0111)
   salida(0011_0110)
   salida(0001_0111)
   salida(0000_0111)
   salida(0000_0010)
end if
if f = " " then        ; space character.
   delay 4 miliseconds
end if
delay 1 milisecond
end procedure

; main program
gpio = all output

if o = 0 then
; Display  "BE HAPPY   "
o = o + 1
forever loop
disp("A")
disp("N")
disp("T")
disp("H")
disp("O")
disp("N")
disp("Y")
disp(" ")
disp("h")
end loop
end if

o = 0
salida(0000_0000)
sleep microcontroller   ; sleep command
nop   ; No operation

anthony123 · 15th January 2008, 10:24 PM

No body can help me??

mvs sarma · 6th February 2008, 08:36 AM

Quote:

Originally Posted by anthony123

Hi, i'm trying to put my name (anthony) into this air display but i cant

I do it with autor's page code and works excellent!!!!
Thankss

TRY THE ATTACHED FILE ANTHONY123

Boncuk · 6th February 2008, 09:12 AM

Hi Anthony,

it would be a good idea to post the exact authors code which is normally displayed.

I translated a BMS computer program from English to German without touching any other Bit, just replaced the English text with German. The program works fine with no malfunctions.

I have two powerful hex editors and finding the author's code it will be changed very quickly.

Assuming the author didn't deliver the source code (why should he?) the only way to apply changes is going directly to the hex code.

Disassembling would be another choice, but do you know which language was used to create the hex file?

Boncuk

mvs sarma · 6th February 2008, 09:56 AM

Quote:

Originally Posted by Boncuk

Hi Anthony,

it would be a good idea to post the exact authors code which is normally displayed.

I translated a BMS computer program from English to German without touching any other Bit, just replaced the English text with German. The program works fine with no malfunctions.

I have two powerful hex editors and finding the author's code it will be changed very quickly.

Assuming the author didn't deliver the source code (why should he?) the only way to apply changes is going directly to the hex code.

Disassembling would be another choice, but do you know which language was used to create the hex file?

Boncuk

His interest appears to be just to see whether he could see his name -- Perhaps thereafter he would practice the PICbasic or assembly.

anthony123 · 6th February 2008, 02:19 PM

Quote:

Originally Posted by mvs sarma

His interest appears to be just to see whether he could see his name -- Perhaps thereafter he would practice the PICbasic or assembly.

I only want show my name and learn how!!

PD: I dont know use the MPLAB as well as you!! i even dont copile an one single
code in the MPLAB

blueroomelectronics · 6th February 2008, 04:19 PM

Quote:

Originally Posted by anthony123

I only want show my name and learn how!!

PD: I dont know use the MPLAB as well as you!! i even dont copile an one single
code in the MPLAB

Never too late to learn, that would be much easier than trying to modifiy the hex file.
http://josepino.com/pic_projects/air...play_code.html

Here's a flash video I'm working on for using MPLABs Wizard
http://www.blueroomelectronics.com/S...HelloWorld.swf

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6th January 2008, 10:05 PM	(permalink)
anthony123	Changing the hex code Hi, i'm trying to put my name (anthony) into this air display but i cant I do it with autor's page code and works excellent!!!! Thankss

6th January 2008, 11:00 PM	(permalink)
jpanhalt	Why not just modify the code under "algorithm" and re-compile? John

7th January 2008, 01:38 PM	(permalink)
anthony123	The problem is: i dont know re-copiler. Do you can say me what are the rigth tools to do that? Pls help me... i wanna learn about copilation process...

7th January 2008, 02:01 PM	(permalink)
jpanhalt	There seem to be two choices to do what you want to do: 1) Edit the hex code directly; or 2) Edit the source code ("algorithm") and compile to give new hex code. The first choice in my view is much more difficult, particularly if you are not familiar with coding. You have to use a hex editor, not a text editor. If you use a text editior, it may seem to work from what you see on the screen, but it won't work when you try to re-program the chip. I have used a hex editor couple of times in my work when I did not have access to the source code, but I did have access the hex code. In fact, I did essentially what you are trying to do, namely change the names of some variables. However, as I just stated, it would not be my first choice, since the source code is available in the "algorithm." The second choice is easiest. The steps in the algorithm that spell out the greeting can simply be change to other letters to spell anything you want. Then when you program the chip the language of the "algorithm" will be converted to hex code by the compiler. I cannot get much more detailed than that without know what you have for a programmer and whether you are familiar with assembler (assembly) language. John

7th January 2008, 05:02 PM	(permalink)
anthony123	Well i have MPLAB but i dont know use it!!! Can you guide me saying me few importants steps??

15th January 2008, 10:24 PM	(permalink)
anthony123	No body can help me??

6th February 2008, 09:12 AM	(permalink)
Boncuk	Hi Anthony, it would be a good idea to post the exact authors code which is normally displayed. I translated a BMS computer program from English to German without touching any other Bit, just replaced the English text with German. The program works fine with no malfunctions. I have two powerful hex editors and finding the author's code it will be changed very quickly. Assuming the author didn't deliver the source code (why should he?) the only way to apply changes is going directly to the hex code. Disassembling would be another choice, but do you know which language was used to create the hex file? Boncuk