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greatscottgadgets / ubertooth

Software, firmware, and hardware designs for Ubertooth
https://greatscottgadgets.com/ubertoothone/
GNU General Public License v2.0
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Differences between LPC175x chips? #451

Closed pmcna closed 3 years ago

pmcna commented 3 years ago

Is there a known method for programming firmware to the different variants in the LPC175x famly?

In reading here (https://os.mbed.com/questions/54231/Burning-hex-file-on-LPC1768-flash-memory/) it looks like there are slight changes that are required depending on the chip selected. The Ubertooth-one that I received has an LPC1756 on it, but my custom PCB used an LPC1758. I've been able to swap out the chip on the ubertooth-one board with an LPC1758 and program through ISP the bluetooth_rx_only.hex using the lpcisp library but the program doesn't stick after a reboot.

Any thoughts/suggestions?

Thanks!

orgua commented 3 years ago

It lies some years in the past, but if i remember correctly there was a special fuse that had to be set prior to programming. And did you compile the firmware for that exact IC?

pmcna commented 3 years ago

Special fuse? Interesting, I have not seen something like that yet.

I have not compiled the firmware for the exact IC yet though. I extracted the firmware from the ubertooth-one using FlashMagic, then changed the chip on FlashMagic to 1758 and then downloaded the same firmware but that didn't seem to cut it. I'll give it a run compiling for the exact IC

pmcna commented 3 years ago

Ok, I think false alarm on this specific issue. I downloaded the bootloader.bin and now it seems to come up after a reset and dfu mode works as expected.