Serial debug (console) approach...?

[just_z00t]

What's the purpose of the 14-pin connector (JP4) and these two jumpers (JP1,JP2) found on the frontside?

JP4 sure looks like a ARM JTAG inteface to me.

Another thing that might be worth mention is that the 7312 is a low power chip package, so if you want to use the serial port and connect it to a RS232 port you will have to convert the logic levels from 3.3v to RS232 levels.

Here is a pinout of UART 1 on the 7312.

http://www.webeatyou.com/phatbox-serial.jpg

just_z00t

[judb]

JP4 sure looks like a ARM JTAG inteface to me.

Another thing that might be worth mention is that the 7312 is a low power chip package, so if you want to use the serial port and connect it to a RS232 port you will have to convert the logic levels from 3.3v to RS232 levels.

Here is a pinout of UART 1 on the 7312.

http://www.webeatyou.com/phatbox-serial.jpg

just_z00t

http://forum.phathack.com/cgi-bin/yabb/YaBB.cgi?board=faqlist;action=display;num=1111166455

Thanks for the photo though.  The 3.3 volt to serial voltage levels might be what I am missing.. hmmm didnt think of that.  I'll have to look into it.

[sbingner]

http://hans.liss.pp.se/work/wrt54gs_serial.html  may be useful, it goes over converting the voltage for the WRT, and it may be very similar for the phatbox

[bushing]

http://hans.liss.pp.se/work/wrt54gs_serial.html  may be useful, it goes over converting the voltage for the WRT, and it may be very similar for the phatbox

Bah!  I just ordered one of each of these on eBay:

$19 RS232 to 3.3~5v TTL Converter Cable(Max3232 inside)
http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=7501584474

$25 **** COMPACT BUFFERED JTAG ** UNIVERSAL SOLDERLESS R/W
http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=5777335122

*crosses fingers*
-b

[judb]

the connector for your jtag device is too big me thinks.  I could only find that the connector pins for a compact flash card reader / PCMCIA interface are close enough together to correctly mate with the interface on the board.  just FYI.

[bushing]

the connector for your jtag device is too big me thinks.  I could only find that the connector pins for a compact flash card reader / PCMCIA interface are close enough together to correctly mate with the interface on the board.  just FYI.

Yeah, I know.  I don't need no stinkin' connectors.


-b