Programming after loading the bootloader into PIC4550 using ICD2

after i use the ICD2 to load the bootloader into the PIC18f4550, can i program it with other simple method for the next time programming. i know that there is only limited programmer limited in the MPLAB IDE v7.40. so any suggestion?

pic 4550

Hi Patrick,
Yes, once you burn a bootloader into your micro, you can then just program the part using the serial port. Myself, I just use the ICD2, and find it just about as convenient, in most cases, as a bootloader. I hope this answers your question.
Regards,
Robert

icd2 icprog

thanks for ur reply. but can i ask one more question? u use jdm to download the PIC after use the bootloader(icd2). can suggest the way of the connection using the serial connection? and the program used to download with the serial programming. i have build one with the url below
**broken link removed**
and i find that it have problem with the icprog program.
the invalid verification: fail at the 0000H address.

ic-prog icd2

Hi,

I went and looked at
**broken link removed**

OK, now makes more sense. You are trying to build an ICD2 clone!

What they are doing is using the JDM pc downloader (IC-Prog) to program the pic with low voltage programming. I have never used low voltage programming myself.
According to the site you list, you need to make a serial cable to use as a programmer, to download the bootloader firmware to the PIC.

It sounds like this is where you are having difficulty, is it?
The verify error seems to indicate that IC-Prog did not write to the PIC. Double check all your connections, etc., and make sure you have the correct port and settings selected.

Myself, I am quite leary of this set up. I would look around and try to find some other designs, but the problem is that many of the cheap self made programmers will not program the 18F parts. Do you have any friends, or know anyone with a programmer, who would program the bootloader to the PIC for you? There are places on the net which can supply you with a pic which has a bootloader, but of course they charge for that service. I'm guessing you are a student, or have a low buget, so can't just go out and buy a programmer, so want to build your own.

If you wanted one for the 16Fxxx parts, this would be easy. Ah! I just looked at his hardware page: He is using a 16F876!! Perhaps that is why you are having such a hard time. Can you get a hold of one of these devices? To program a 16F part, there are also tons of very cheap home built programmers. All you really need is to get the bootloader burnt to one chip, and you will be ok. I think the trouble you are having is because you are trying to do this with an 18Fxxx part.

Once you have your bootloader burnt to the Pic you won't need a programmer, you can use a regular serial cable.

u use jdm to download the PIC after use the bootloader(icd2)

Click to expand...

No, once you have the bootloader burnt to your pic you just use the downloader program, or hyperterminal (depends on which bootloader you have) to program the micro.

can suggest the way of the connection using the serial connection?

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Once you have the bootloader installed in your PIC you should be able to use a regular serial cable.[/url]