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Dangerous Prototypes

Dangerous Prototypes => Bus Blaster JTAG debugger => Topic started by: emusic on August 26, 2014, 02:43:49 am

Title: Self-test with external connection to own CPLD in v3
Post by: emusic on August 26, 2014, 02:43:49 am
In this post (http://http://gimmor.blogspot.de/2013/01/bus-blaster-v2-uart-ttl.html) (in Russian), a guy uses an external connection between JTAG header and BB's own CPLD (JP1) as a self-test to check new JTAG software. If XILINX device is successfully detected, the software seems to be working properly, as BB's buffer too.

With my v3c, I cannot get it working with UrJtag 0.10 and any of v3 SVF files found here. Watching signals with a scope, I see TMS is asserted low, TCK produces a clock signal, TDI is altered too (but shows only short positive spikes) but TDO is constantly high or low.

Native BB's self-test works properly with BBV3-JTAGkey-selftest-v1.1.svf.

Could it be due to some FT2232-CPLD connection changes in v3 from v2?
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Call Stack
#TimeMemoryFunctionLocation
10.00872035592session_write_close ( )...(null):0
20.00902167168ElkArte\sources\subs\SessionHandler\DatabaseHandler->write( )...(null):0
30.00902167944Database_MySQL->query( ).../DatabaseHandler.php:119
40.05232306664Database_MySQL->error( ).../Db-mysql.class.php:273