What Bootloader to use?

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  1. #1
    Join Date
    Mar 2010

    Thumbs up What Bootloader to use?

    Hello all!
    I'm new here to the forum. Actually not new just first post. I have been programming PICs for about 6 years now and have quite a few projects. I am currently working on converting the Serial Servo Controller to USB and it works fine but am dreading changing the chip out everytime I need to change something in the firmware. So....I would like to know if anyone is using a bootloader and what you would recomend? I've researched through Google and the forums here and pretty much everywhere but haven't come to a consensus or if the ones suggested need updating I am not investing in another compiler since i only do this as a hobby I'm very selective on what I spend money on. I have been using the 18F2550 and 4550's to GREAT sucess and have CDC communications working between visual basic and PIC via USB using the following schematic:


    I am also interested in making a USB PBP/VB Bootloader in case anyone wants to help with that. I have pretty much deciferred the Sparkfun source code to update to a USB CDC version since my computer doesn't have serial ports. But I have questions on how exactly the info translates from the Hex file to the pic. I can read through a hex file and totally understand how to do checksum and reading bits and the Intel Hex format, etc. I just get lost at the part of uploading the program to the PIC memory from my VB program and with a family I just don't have tons of time to do a lot of researching before building so I figured a good joint effort between fellow designers might help.

    Any and all help is appreciated and thanks in advance I hope to become quite regular here now,


  2. #2
    Join Date
    Feb 2006
    Gilroy, CA

    Did you find this post helpful? Yes | No


    I have used the tiny bootloader. It is serial based. http://www.etc.ugal.ro/cchiculita/so...bootloader.htm

    The Micro Code Studio bootloader is handy if you have MCS.

    And I have used Microchip's HID Bootloader which is usb based. The USB is very nice, but you need to have a hardware button to bring it to bootloader mode.

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