Posted By KurtL on 31 Jul 2007 10:30 AM
The FT2232 device is a UART to USB converter chip which, if you notice, is included on the baseboard. (U39) However, UART to USB conversion is not equivalent to JTAG communication ...
JTAG is, in general, fast serial channel. FT2232 is universal, fast and dumb serial-to-USB interface. Everything "smart" can be done in software on PC side, I think. (Note: Please distinguish between slow single-channel FT232 on LITEKIT and faster dual channel FT2232 on low-cost JTAG devices.)
Posted By KurtL on 10 Sep 2007 8:29 AM
If you find a low-cost JTAG tool, please share your findings and experiences for other users.
I used FT2232 on Cirrus EP9315 (ARM9) development board. Maybe it can also work with i.MX31 (ARM11). I will post some experiences later.
Posted By KurtL on 10 Sep 2007 8:29 AM
Most of our i.MX31 SOM customers never require the use of JTAG because the Lolo operating system and winCE 6.0 BSP
I want some special bootloader functions and low-level Linux-kernel device drivers debugging.
You are right, these probably aren't usual customers requirements.
Thanks for support,
Tomas