Category: Driver Boards
Thanks for your help in attempting to debug this, but I'm struggling to find the h/w issue. The setup is PC > 7I92T via eth, +5v supply to the 7I92, +12v to 7I76 field, grounds tied. The 7I76 is connected to P1 with a new ribbon connector (~10cm) I just made and buzzed all pins on. W3 jumper on 7I92 set to supply power to the daughter, and I see the power LEDs on both cards (total of 3).
Flash the 7i92t_7i76x2d.bin firmware from website DL and I can see the 7I76 field I/O with mesaflash <...> --sserial, a manual halrun enumerates the SS interface, can see the 7I76 pins, and detect toggle on I/O. Created a clean LinuxCNC test config assigning some of the field I/O as limits, when I pull the pins high LinuxCNC trips as expected.
Flash the firmware you attached below, no change to hardware config, none of the above works. However it does seem like something is marginal somewhere - repeated probing with the mesaflash --sserial query does occasionally report "sserial device at channel 0: 7I76 (unit 0x00000000)" but never the remaining device information. The 7I76 green comms LED does trigger with each query.
I will dig up some different power supplies, that's about the only thing left I haven't swapped out yet.
