Hi everybody,
I have some problems with PC104 bus transfers, and some questions for you, I
hope that you can help me:
I need to do transfers by PC104 bus, I did it using the bus as GPIO, however
this bus is so slow in that mode. I get effective reads less than 2MHz, but I
need to increase this rate transfer at least 10 times.
I contacted to technical support, but they say:
"The Marvell CPU PCI bus has a performance problem where delayed read
transactions are only retried 500nS after their are first delayed which is a
very long time. (Only approx 20 ns is needed for the FPGA core to complete the
read) This will limit FPGA register read speed".
I want to try using the DMA for ISA devices, but I don't know if this mode is
completly supported by this board, has anybody used the bus in that way? and
which is the rate transfer in this case?. I guess this could be the faster way
to transfer data by this bus.
Any sugestions?.
Thanks in advance.
Regards.
Liz
------------------------------------
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/ts-7000/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/ts-7000/join
(Yahoo! ID required)
<*> To change settings via email:
<*> To unsubscribe from this group, send an email to:
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|