So I get my hand on a PIC18F2550.Unfortunately I don't have a PIC programmer, and I'm reluctant to build a parallel/printer port programmer, so I made one using my Arduino.
The PIC18F2/4 family support low-voltage programmer which makes easier to program via the Arduino.Moreover the programming specifications are well written and quite easy to understand.I wrote my sketch to work with PIC18F2550 only, but with a minor changes it can be work for the whole family as well (a full list of the family can be found at the end).
Connecting the arduino to the PIC is quite simple:
note! the pins should be connected through a resistor, I used 1.2K. anything over 200R will be just fine.
version 0.3 is out
fixes that arduino was not detected unless it was over COM3
Thanks to Nickson Yap that pointed me out the bug,
as well as helped me recompile the project
the newest version can be downloaded at the bottom of the page
The project has been ported by Harry Braviner to PIC18F2420, you can
find well written tutorial over Harry's blog
This 'dummies guide' might be much understandable for beginners.
Unless you are planning on porting it to another microcontroller, I'd suggest you
to take a look at his post.
The programmer was ported to Linux!
I've test it myself, if you manage to get it working let me know in the comments
The adoption for Linux was made by Jose Carlos Granja
The source code was added to BitBucket, here is a link to the repo
Version 0.2 is out!
Now you can program your Pic just by selecting a .hex file
if you have any questions please leave your message in the comment section
1.Download the new version
2.upload the sketch to the Arduino
3.connect the pic18f2550 to the arduino
4.locate your hex file (you can use the blink example, just connect an led to one of the pins)
MemoryIn order to program the chip, upload the sketch to your arduino(can be downloaded at the end)
but before we start let's see how the memory is organized:
*Unimplemented = read as '0'
*ID Location - are not implemented in my code
Interfacing with the programmer
now, let see how to interface with the programmer.the command listed bellow will be send to the arduino via the serial console.
Read command: the following command read 32bytes works for 0x0 - 0x3FFFFF:
R< 6digit address >X
Write command:the following command writes 32bytes of data, it work for 0x0-0x7FFF, the address that you are writing to have have to be even on the second digit and have to be 0 on the first digit,other wise it won't work:
W< 4digit address >< 32 bytes of data>X
the following command writes:
Erase command: preform a factory reset. reconnect the power afterward!!!
Write config/fuse bits: sets one byte at a time:
C<Number of fuse, in HEX><one bytes>X
the following writes:
FLASH AN LED
you can send the following command in order to make the device flash all it's PORT at 1Hz
EX ( reconnect the power afterward!!! )
the following commands erase the chip, set the chip run via the internal clock
and write the following
this was taken from the follwing hex file:
which is the compiled version of this:
I know that is takes a lot of time to convert an HEX file in to commands that will write the compiled code, There is needed somesort of GUI that will do it, I'm not planning to write it in the near further, If you do I'd be glad if you post in over here
that's it feel free to comment.
• PIC18F2221 • PIC18F2580 • PIC18F4480
• PIC18F2321 • PIC18F2585 • PIC18F4510
• PIC18F2410 • PIC18F2610 • PIC18F4515
• PIC18F2420 • PIC18F2620 • PIC18F4520
• PIC18F2423 • PIC18F2680 • PIC18F4523
• PIC18F2450 • PIC18F2682 • PIC18F4525
• PIC18F2455 • PIC18F2685 • PIC18F4550
• PIC18F2458 • PIC18F4221 • PIC18F4553
• PIC18F2480 • PIC18F4321 • PIC18F4580
• PIC18F2510 • PIC18F4410 • PIC18F4585
• PIC18F2515 • PIC18F4420 • PIC18F4610
• PIC18F2520 • PIC18F4423 • PIC18F4620
• PIC18F2523 • PIC18F4450 • PIC18F4680
• PIC18F2525 • PIC18F4455 • PIC18F4682
• PIC18F2550 • PIC18F4458 • PIC18F4685