[chbot] Progress on eSmart Display

[Spencer Travers]

I am making up a jig to allow rapid reprogramming/unlocking of the
displays. If I get it working in time I will bring it along to the next
meeting so people can enable the ISP port on their displays.

Essentially it is a PLCC socket that fits on top of the MCU on the board
and makes the appropriate connections to the AVR Dragon.

Perhaps we can set up a production line at the next meeting?

The bootloader is a good idea. Unfortunately the serial port is not
directly available on any of the headers or external connectors. I wonder
how difficult it would be to modify the bootloader to bit-bash a serial
port on the MOSI/MISO pins on the ISP connector? It would be neat to avoid
modding the hardware.

Spencer


On Wed, May 29, 2013 at 2:02 AM, Synco Reynders <synco.reynders at gmail.com>wrote:

> Good job Spencer,
>   I'm thinking that'd be great if we could all leverage from your work, so
> a step I'd be interested in is if you can get a bootloader such as KAVR
>  (my preferred one, http://sourceforge.net/projects/kavr/) working. So
> one only needs to high-voltage program the unit once, and then its as easy
> as making a serial cable.
> I've got some very universal LCD driver code somewhere which could be
> handy... let me know if you'd like it.
> Regards,
> Synco
>
>
> On 25 May 2013 20:14, Spencer Travers <spencer.travers at gmail.com> wrote:
>
>> To those that are interested, I have managed to reprogram one of the
>> displays with a 'hello world' program (play a beep). I used my AVR Dragon
>> in parallel programming mode to erase the chip and enable the ISP port. To
>> protect the reset IC from the high programming voltage (12V) I cut a single
>> track, but I'm not sure if this is really necessary.
>>
>> The next step is to get the LCD going...
>>
>> Spencer
>>
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