how to setup mesa 7i83

"sserial_port_0=00000000"
would make sense for a 7I74X2 config with only the first port (on P3) used
(and all 8 channels of port 0 set to mode 0)

If you use all 16 channels (a 7I74 on P3 and P2) you could use
"sserial_port_0=00000000 sserial_port_1=00000000"

Thank you very much for help,

so in "sserial_port_0 = 00000000" the serial_port_0 is controlled by P3, 8 number zeros are 8 channels, but:

What do you mean about "mode 0", are there some other modes or it just means enable and disable? Where can i find these config strings ? I read document of 7i74 but didnt find it out

I also wanna know what are hal_pins name to control, is that like " hm2_5i25.0.7i74.0.1.analogout1" i found this type name from gnipsel.com/linuxcnc/configs/7i77.html . But i dont understand what do numbers mean?

I think a simple way to send an analog signal to 7i83 is:
Use M66-67 command, connect pin "motion.analog-out-NN" to "7i74 hal pin"

The analog out names should be like:
hm2_5i25.0.7i83.0.1.analogout0

i'm using 7i74x2 firmware.
the "sserial_port_0=00000000" will set P2 to mode 0

the "sserial_port_0=00000000 sserial_port_1=00000000" wont set P2 and P3 to mode 0

the "sserial_port_0=xxxxxxxx" will set P2 and P3 to mode 0



below is my config file:
it shows bug :
./5i25.hal:61: Pin 'hm2_5i25.0.7i83.0.1.analogout0' does not exist

What version of LinuxCNC are you using? That looks really wrong

EDIT, actually now that I think about it, that's all correct

if you enable the ports but no sserial device is found the ports revert to GPIO
If you disable the ports (with x) or missing sserial_port token they are not probed so still
show up as sserial at that point in initialization

What you data does show is the the card was not found
This is most likely because of missing power somewhere
(7I74 or 7I83)

Also note that I said the signal name would look like
hm2_5i25.0.7i83.0.1.analogout0
the actual name depends on the channel and port
(use halcmd show pin *7i83*)

i'm using linuxcnc 2.8 pre with ubuntu 16.04 and preempt-rt.

I didnt wire all pin of 5i25 --> 7i74 because i dont have DB 25 male-male cable, i just wired gnd and some pins. I will try connect all pin and check power again.