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[DPRG] Tini2138 and BOE/BOEbot

Subject: [DPRG] Tini2138 and BOE/BOEbot
From: Dale Wheat dale at dalewheat.com
Date: Sat Nov 29 11:23:33 CST 2008


I had something similar working about a year or so ago, using one of the 
prototype robot chassis donated by Jon Williams.  It had a BOE inside and I 
replaced the BASIC Stamp with a TiniARM module from New Micros.

You have to drive P0.14 either high or low (I forget which) during reset to get 
the LPC2138 to enter bootloader mode.  You can use one of the other RS232 lines 
to do this for you, and another RS232 line to act as a reset line.  This will 
allow you to reprogram the part "handsfree".  This method is also available 
using the lpc21isp command line software, which I prefer to the Philips utility.


Dale Wheat

(972) 486-1317

Bruce K. Harlan wrote:
> Hi.
> In trying to run a BOEbot (Revision C) with a Tini2138 instead of the
> Stamp processor, 
> 1) We are able to get power to the Tini2138 (all 3 LEDs are
> illuminated). We have a 9v. battery on the BOE to get sufficient power
> to the Tini and have the BOEbot configured to run regulated power to the
> motors. We have the Tini2138 in the appropriate carrier and it is
> mounted on the BOEbot.
> 2) We cannot get communications signal established. We are using a
> USB-to-serial cable and the Philips GUI to communicate. Both the
> computer control panel settings and the Philips GUI agree that it is
> COM2 and 9600 baud, but we still get the "Unable to communicate with
> test board" error. The Philips GUI makes no mention of parity or stop
> bits, so we used the default settings on the computer.
> 3) A check of the Philips FAQ and a dogpile.com search did not turn up
> any answers to this problem.
> Does anyone have any suggestions for how to open communications with the
> Tini2138 in this situation?
> Sincerely,
> Bruce K. Harlan
> Nathan Harlan
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