So I am still curious if connecting some device to a Mesa Anything I/O board such as the 7I80 using SPI is easy or difficult to do.
I see that there was some work proposed for a SPI sub-driver for hostmot2 <http://wiki.linuxcnc.org/cgi-bin/wiki.pl?SPI_Sub-Driver_For_Hostmot2> but maybe not much has changed since this was added to the wiki. my understanding is that this would work for some SPI communications between a card like a 7I80 and some device. The driver would allow a user to configure the SPI comms for the number of SPI channels and the amount of data frames transferred with each request. I see that some I/O boards already use SPI communications, along with discrete I/O such as the 7I65. So I suppose one could make a device that uses the SPI interface and pretends to be the DACs from a 7I65, but that would be kind of limited as the communications is probably just output only. But what about the 7I46? Is that I/O card supported by LinuxCNC in some way? How are the SPI ports configured? Is there still interest in the SPI sub-diver for hosmot2? Has the community moved on to better ways to interface to other devices? Yes I know that the distance that SPI works over is limited, but on the other hand it is a pretty simple interface and the data rates can easily be 10Mbits/sec if limited to short distances like 10 - 20 cm. Regards, John Figie _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
