On Sunday, July 04, 2010 18:06:24 Gregg Levine wrote: > On Sun, Jul 4, 2010 at 5:22 PM, Mike Frysinger wrote: > > On Sunday, July 04, 2010 01:19:58 Gregg Levine wrote: > >> I actually asked this question a while ago, whilst pursing a > >> completely different project, but with the same parts. So here goes: > >> How would I go about setting the four GPIO points on an FT232 chip to > >> be used as a JTAG device? These points are: > >> CBUS0 > >> CBUS1 > >> CBUS2 > >> CBUS3 > >> -- > >> According to available data sheets from FTDI (v2.06 is the most recent > >> or so it seems for the FT232.) and an application note, > >> AN232-01 "AN232R-01 Bit Bang Modes for theFT232R and FT245R" the C0 or > >> CBUS lines are in fact capable of being driven in a mode that supports > >> this method. > >> > >> Basically I am asking if anyone has had a reason to accomplish this? > >> Obviously when the part is being used this way the UART end is not > >> usable. > > > > so you dont actually want to use this with urjtag ? but some standalone > > project ? wouldnt it make more sense to ask on the libftdi list then ? > > http://www.intra2net.com/en/developer/libftdi/ > > Reading between the lines? Of course I'll be using the gizmo with > urjtag.
then look at the exiting ftdi cable drivers to see how they bind to specific VID/PID combos and then set up specific endpoints for JTAG use -mike
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