On 2013-06-19 23:36, Mike Harrison wrote:
> However Lattice support JTAG using the FTDI FT2232H , so yu may be
> able to use a generic HS FTDI
> cable like this
>=20
> I'm not sure if Lattice use the FTDI default PID/VID, or if there are
> issues using the 232H as
> opposed to the 2232H. I have one of these cables & about to start a
> Lattice project so will give it
> a try soon,

Very interesting idea.  The FT232H chip has the MPSSE built in so it=20
contains all the necessary magic.  Note that the FT232R does not, which=20
is unfortunately the cable I have.

Lattice actually publish some schematics it seems:=20
http://www.latticesemi.com/documents/an8082.pdf

http://openocd.sourceforge.net/ appears to work with any FTDI chip that=20
has the MPSSE, but I don't know how well ispVM or other Lattice tools=20
will work with it.

I'm wondering if using a breakout board like http://tinyurl.com/pyw27ys=20
is a better idea.  I didn't want to use the 4xxx series as they are=20
3.3v/TQFP, but I could make the trade-off if it gets development going=20
quicker.

If you test yours please let me know, I'd be very interested.

David
--=20
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