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16f887 Bootloader

 
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macgyver



Joined: 24 Aug 2005
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16f887 Bootloader
PostPosted: Fri Apr 30, 2010 4:57 pm     Reply with quote
Is there a bootloader for the 16f887? If not can the 16f877A be used or modified?

Thanks.
Rohit de Sa



Joined: 09 Nov 2007
Posts: 282
Location: India

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PostPosted: Sat May 01, 2010 6:32 am     Reply with quote
Try the Tiny PIC bootloader http://www.etc.ugal.ro/cchiculita/software/picbootloader.htm

As the name suggests - its small, and easy to use.

Rohit
macgyver



Joined: 24 Aug 2005
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working for anyone who is interested
PostPosted: Tue May 04, 2010 10:45 am     Reply with quote
Got it up and running with tinybld just a few mods.
Code:

xtal EQU 20000000

_HS_OSC (remove the internal oscillator line)

and tell it where the includes were.

All seems fine.

Using #build(reset=0x000:0x0007) in CCS to protect bootloader but not sure if its right.

http://www.microchipfault.com/questions/95/porting-pic16f877a-bootloader-to-pic16f887

Does not work, starts to download then times out.

Now trying to get tinybld to bootload at 19200 and use terminal at 9600.
currently it takes the downloader baud rate for terminal rate, may be able to edit the config file to do it, more investigating required.
Rohit de Sa



Joined: 09 Nov 2007
Posts: 282
Location: India

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PostPosted: Tue May 04, 2010 10:53 am     Reply with quote
Ok, I haven't really understood what the problem is. Anyway, the bootloader defaults to 115200 baud. If you want other speeds you'll have to re build the asm file.

Rohit
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