Mesa 7i92 .bit file

I have a Mesa 7i92 board. It's plugged into a generic breakout board.

I ran the command
sudo /usr/bin/mesaflash --device 7i92 --addr 192.168.1.121 --readhmid
to see how it was configured. The initial pinout won't work. I need a new .bit file for my board. I looked around, but could not find anything about how to make a custom file. Here's what I need:

Pin#FunctionDir
1 PWM out
2 X Step out
3 X Dir out
4 Y Step out
5 Y Dir out
6 Z Step out
7 Z Dir out
8 A Step out
9 A Dir out
14 Enable out
16 spare in
17 Relay out
10 eStop in
11 Probe in
12 X Limit/Home in
13 Y Limit/Home in
15 Z Limit/Home in

Could someone point me in the right direction, or possibly generate the file for me?

Thanks.

Thanks for the quick reply.

I saw the DMMBOB file in the zip file I got from Mesa, but didn't know what it did. Thanks for the link.

Yes, I could rewire, but I'd prefer not to. The board is stenciled with the functions on those pinouts. I've used JST-XH modular connectors for each of the axes. They're soldered to DB-9 connectors. I could resolder them differently, but I always seem to melt stuff I didn't want to on the second go-around.

Regarding the PWM, I have no current use for it, so if it does not work, that's OK. If I ever need to control a VFD, I'd likely do it with a 0-10V signal anyway.

In summary, it will take some time to change the wiring around, and I'll have to remember that the labels are not correct. If it'll take hours to make a new .bit file, then it'll probably be better off to move the hardware. I don't know what's involved in making a .bit file, so I'm unable to make the best decision here!

I was looking over the pinout in my original post, and realized I neglected to put the function for pin 14. It's the Stepper Enable output.

OK. Is there any way to see what the pinout on this .bit file is, other than installing it on the board and running the --readhmid command? I looked in the hostmot2-firmware.git / tree, and did not see it.

OK, I see what you're saying. The G540 is really close to my BOB. Here's the comparison with a revised mapping:

Pin G540 my BOB
1 GPIO eStop
2 X Step X Step
3 X Dir X Dir
4 Y Step Y Step
5 Y Dir Y Dir
6 Z Step Z Step
7 Z Dir Z Dir
8 A Step A Step
9 A Dir A Dir
10 Quad A Quad A
11 Quad B Quad B
12 Quad Idx Quad Idx
13 GPIO X Limit
14 PWM Enable
15 GPIO Y Limit
16 Charge Pump Z Limit
17 GPIO Relay

I've got one question. Is pin 14, the PWM, something special, or can I use it as a GPIO for the Enable signal? This particular pin is hardwired in the breakout board to each of the JST-XH modular connectors.

I also realized that I forgot to include the lathe spindle encoder in the list. But I can easily rewire pins 10-17, so I can just shuffle things around as shown.

I have the configuration flashed and verified on the 7i92.

The next step is to modify the (machine).hal and (machine).ini files. I generated the initial version of both files using the Stepconf Wizard. I realize that I can't use the Wizard to make the files I really need, or to edit them in the future.

I downloaded the 7i92step.zip file, and it contains two example configuration files. Based on that, I modified the .ini file as follows:

[HOSTMOT2]
DRIVER=hm2_eth board_ip="192.168.1.121"
BOARD=7i92
CONFIG="num_stepgens=4 num_encoders=3 num_pwmgen=0"

I then started work on the .hal file. I added these lines at the beginning:

loadrt trivkins (not sure if I actually need this line)
loadrt [EMCMOT]EMCMOT servo_period_nsec=[EMCMOT]SERVO_PERIOD num_joints=[TRAJ]AXES
loadrt hostmot2
loadrt [HOSTMOT2][DRIVER] config=[HOSTMOT2][CONFIG]
setp hm2_[HOSTMOT2][BOARD].0.watchdog.timeout_na 25000000

If I understand this correctly, I need three files in my /usr/lib/linuxcnc/modules directory to make this work:
hostmot2.so
hm2_eth.so
hm2_7i92.so

I'm missing the third file. Is there somewhere that I can get this file, or do I need to create it from a file on the 7i92.zip download?