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USB Bootloader
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Date: 2006/06/19 02:19
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By: Mat
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Status: Admin
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Karma: 7
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| Posts: 211 |  |
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This thread discusses the Content article: USB Bootloader
So any thoughts on the USB Bootloader code? Anyone found it useful? Any bugs?
Hope its useful!
Mat
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Re:USB Bootloader
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Date: 2006/06/19 19:03
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By: ryokan78
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Status: User
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Karma: 0
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| Posts: 1 |  |
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Checked it out. Works great. Fast. Faster than my Java bootloader using a Win32 DLL with a Java JNI, Java Native Interface, wrapper to talk to mpusbapi.dll.
Richard Currier
richard_currier@hotmail.com
Richard Currier
richard_currier@hotmail.com
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Re:USB Bootloader
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Date: 2006/06/19 19:07
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By: Mat
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Status: Admin
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Karma: 7
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| Posts: 211 | |
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Glad you like it, I was actually thinking that it was rather slow, as I hadn't done any optimisations on the code yet! Glad it works for someone else
Mat
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Re:USB Bootloader
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Date: 2006/06/21 12:17
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By: uuu
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Status: Visitor
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Hello,
Please, anyone can help me in how I can use this bootloader???
and if the pic18f4550has a code completely different; I mean I want to program the pic18f4550 with a new code can this occur??
and this bootloader doesnt need a circuit or how the bootloader will connect to pic18f4550??
Please, reply me ????????????????
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Re:USB Bootloader
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Date: 2006/06/21 12:34
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By: Mat
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Status: Admin
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Karma: 7
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| Posts: 211 | |
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Hi, and welcome!
The Bootloader is an entirely software way of reprogramming the PIC18F4550, as long as the correct software is programmed via a physical programmer initially on the PIC (i.e. the bootloader).
The circuit is the same design as the original basic usb article. You will require a normal PIC programmer to program the bootloader software onto the device first.
You can use this software to reprogram the device however it is mainly intended for a design in use by a customer and not to program development software with, as it allows no methods of debugging the code.
If you could be more specific with what you need then I might be able to help further.
Mat
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Re:USB Bootloader
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Date: 2006/06/21 16:15
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By: uuu
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Status: Visitor
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Hi Mat,
I dont understand what are you mean, can you explain more
Look, I have a pic18f4550 and it is programmed with a code but now I will reprogram it with new code
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Re:USB Bootloader
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Date: 2006/06/21 16:39
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By: Mat
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Status: Admin
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Karma: 7
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| Posts: 211 | |
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The bootloader probably isnt what you are looking for, have you done any PIC programming before? You will probably need a PIC programmer, see the links section for some examples.
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Re:USB Bootloader
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Date: 2006/06/21 18:01
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By: uuu
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Status: Visitor
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I didnt use pic programer.
you mean that this boatloader will be used with the pic programer??
please explain for me
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Re:USB Bootloader
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Date: 2006/06/22 21:18
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By: Mat
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Status: Admin
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Karma: 7
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| Posts: 211 | |
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Yes you have to program the bootloader onto the PIC with a programmer initially, after you have programmed it once, you can update the code via the USB.
Mat
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Re:USB Bootloader
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Date: 2006/06/23 07:57
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By: uuu
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Status: Visitor
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ok then let me more specifice now in my question and hope you will understand me
if i have a pic which is already programmed . >>but programmed with another software and used in another circuit(more clear...programmed by ICD2 and used in a circuit that is a part of the programmer . its a kind of a robot with a boared you can programe the pic using it diredtily )
is it possible to put the pic18f4550 in the circuit in the articlebasic usb and programmes it by the bootloader???
please tell me if this right or no 
with regard
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Re:USB Bootloader
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Date: 2006/06/23 09:30
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By: uuu
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Status: Visitor
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Oops..........
i will repost it since it has a thousand of spelt mistake
ok then let me be more specific now in my question and hope you will understand me
if i have a pic which is already programmed . >>but programmed with another software and used in another circuit(more clear...programmed by ICD2 and used in a circuit that is a part of the programmer . its a kind of a robot with a board you can programe the pic using it directly )
is it possible to put the pic18f4550 in the circuit in the article basic usb and programmes it by the bootloader???
please tell me if this right or not
with regard
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