Re: what bus architecture should I choose for my custom DAQ board?

---There shouldn't be any problem writing a custom Comedi driver for it. 
All the bus-specific hardware access is confined to the individual 
device drivers; the Comedi ---core does not depend on hardware at all!

---As this is a fairly specialized application, you probably want to 
avoid building the full suite of drivers and just build your custom 
driver and the Comedi core.  You ---can edit the 
comedi/drivers/Makefile.am file to do that (followed by running 
./autogen.sh to regenerate and rerun the ./configure script).

---Thank you, I know that the Comedi core does not depend on hardware at 
all, but for my particular application, i think that choosing  an 
appropriate  interface ---should  simplify  the  programming work 
because lots of reference. Finally, I choose SPI interface A/D and D/A 
chip, does anyone have experience about it? I have ---not written any 
Comedi driver at all.

---Thank you!

---Best regards,

Another question,  If I connect 2 SPI A/D chip together in hardware and 
connect 2 SPI D/A chip together, I think I need to implement 2 SPI 
controllers in FPGA and connect them to PPC core. Do I need to treat the 
2 SPI controllers as two different devices when writing the Comedi 
driver?  Is there any more convenient  hardware connection for writing 
the driver? what about parallel A/D and D/A chip? Furthermore, I want to 
design some digital inputs and digital outputs in my daughter boards, 
what connection method should I choose for the convenient of writing the 
Comedi driver?

Thank you!

Best regards,

Wicky