[Swansea Hackspace] Rumber

[Tim Clark]

Further progress report from last night:

After some diagnostics last night we got both the small and the big chip 
working so now its just a wiring up job to get the printer working!
We discovered 2 important things:
1.    Something is still broken so we can't program the big chip over 
the USB, you have to use the ISP header.
2.    It doesn't work at 250000baud we are using 115200baud and it works 
fine.

Tim

On 07/03/2015 18:56, Tom Lake wrote:
> Quick progress report from Tim and myself:
>
> On 06/03/15 16:06, Justin Mitchell wrote:
>> suggestions are that the chip should come with the DFU bootloader
>> pre-installed, in which case you use dfu-programmer to load the
>> usb-serial code.
> The smaller of the two chips has been flashed using dfu-programmer 
> (v0.7.1 works). It needed a forced erase cycle before it would update
>
>> For reference: the previous chip, when wired in ISP more did not answer
>> to avrdude, giving only 0xFFFF as answers. whereas the 2560 chip would.
>
> We also reflashed the 2560 with the arduino bootloader using my 
> arduino, but cannot get it to talk to a PC directly over USB.
>
> Sending data from PC to the board makes the TX light on the board 
> flash, but no activity seen from the RX light.
>
> The only suggestion from us is that there might be a bad connection 
> between the two ICs on the Rumba board. Might be something to follow 
> up on Monday.
>
> Enjoy the rest of the weekend!
>
> - Tom
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