What does the GPIO use for a bootloader?

[427v8]

I've looked everywhere, I see no mention of the boot loader code.

I'd like to find the source if at all possible.

Thanks
Keith

[Bernard Fife]

Keith,

The GPIO boards use the same bootloader as MS-II. If you buy a GPIO board, the bootloader will already be on it.

Lance.

[427v8]

Lance,
I know the boot loader is already on my board, I've been using it ;-D
I just want to see the source code for it, to see how it loads and stuff you know...

[Bernard Fife]

427v8,

The linked PDF tells how the serial monitor (aka. "bootloader") works:

http://www.freescale.com/files/microcon ... AN2548.pdf

Near the end is a link for typical source code for the HSC12.

Lance.

[427v8]

Thanks Lance.
Everything seems to be working as advertised and I now have a downloader that can program my 64k part, using a flat memory map from 4000 to F780, in one fell swoop.

[GordonP]

I would like to make some minor changes to the bootloader to ensure that certain port pins are set to a known "safe" state during code download. I would like to be able to reprogram without worrying about having to remember to unplug a couple of high current solenoids. Is the actual bootloader source available anywhere for the MS-II HSC12C64 processor? If not, and I have to create my own from the Freescale CW project, is it just a matter of using the normal MS Download program to send the S19 file to the GPIO board?

[Bernard Fife]

GordonP,

The bootloader source is not available, you will have to create your own, as you say. You will need a BDM cable to burn it to the processor.

Lance.

[GordonP]

Thanks Lance.