SSI absolute encoders and analog servos

The smart-serial cards need to be powered-up to be detected. You should see some LED flickering on the cards as hm2_pci loads too.

What firmware did you flash the 5i25 with?

Hi,

Yes adding field power did the trick, thank you. It was flashed with
"freeby.mesanet.com/ssi_ss.zip
Has bit and added source files for a 5i25/6i25 8xSSI+8xSSerial config for a 1 or 2 7I74s
(4 SSI+4SSerial per 7I74 SSI channels first on 7I74 (0..3), SSerial last (4..7)) "

Still would like to know correct config for it to place in INI file. For 4 SSI encoders + 4 sserial cards.

terkaa wrote: (4 SSI+4SSerial per 7I74 SSI channels first on 7I74 (0..3), SSerial last (4..7)) "

The config string for hm2_pci is normally only needed if you want to turn off modules to make the pins usable as GPIO or to set the software data mode of some smart-serial devices.

I can't remember what the SSI driver does with no config string. You should probably try it with one to see if that makes the SSI pins show up.
The format of the config string is described here:
linuxcnc.org/docs/2.7/html/man/man9/hostmot2.9.html#Synchronous Serial Interface (SSI)

Can you paste the pin-description bit from dmesg too? That might be useful reference info.

[code]
sudo dmesg -c
halrun
loadrt hostmot2
loadrt hm2_pci
exit
dmesg[/quote]

Ignore the output of the first dmesg, and paste the output of the second one.

Hi,

I have now made some progress and connected these card amongst many other things. I am now having following problem: It seems that Port 7 is only port working on 7i74. Any card I connect to this port starts blinking green after starting linuxcnc. Ports 4-6 remain red led on. Is it me or?

Tero

Yes it was me. I had ssi_encoders statement on config line and that disabled all ports except no 7.


Tero