Re: HP20b inert - how to get it working again? Message #14 Posted by Marcus von Cube, Germany on 17 May 2011, 3:49 a.m., in response to message #13 by Gerson W. Barbosa
Quote:
Right now I am stuck with an inert 20b myself...
...
The CR-2032 batteries have been replaced with fresh ones (but their voltages have now dropped from 3.15V down to 2.8V).
Any idea? Thanks!
Gerson, that's bad news. :-(
The current draw of SAM-BA is considerable as it does not make any power saving attempts. As soon as you turn on your calculator, it starts eating batteries. Remove them if you do not get the firmware loaded successfully.
I normally do the following: I start SAM-BA on the PC (using an FTDI equipped serial cable, in fact it's my Olimex JTAG adapter right now, but not its JTAG connector but its serial port). Wait until the connect prompt appears. You need to select the correct board type (at91sam7l128-ek) and the correct serial port.
Before I press Enter, I push the reset button on the cable, release it, and hold down ON for half a second or so. I then press enter on the PC to connect.
You can see some diagnostic output from SAM-BA if you start it from a Windows command prompt and redirect the output to a file. I'm using sam-ba.exe V 2.10. The command line is
sam-ba.exe >log.txt
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