New component for keyboards and panels.

The problem now is that I get the error "kb_3x4.row-00-out does not exist"

Possible way to troubleshoot this is to comment out all the lines in hal that give you errors about non existing pins and then once you can get the config started check in halshow what the created pins are actually called. Sometimes copy pasting can give you wrong ascii characters for the hyphen/minus in the pin names so retyping manually may also help.

Fixed.
Since I was defining the use of the matrix_kb component with inputs and outputs, it was necessary to add the letter s to the keypad that is going to be generated in addition to the 7i73 keypad
loadrt matrix_kb config=4x8, 3x4s names=kb_7i73,kb_3x4.
The other error was because halui.mdi_command-00 was misspelled and should be halui.mdi-command-00

I have two keyboards working with the 7i73. One of 5x4 that I use to generate HAL pins, this works without problem, the other of 4x8 I am using to simulate keys with sendkey. This one also responds, but the problem is that it responds very slowly when you press a key or you have to do it several times until it responds. Also, most of the time it stays as if it were pressed and starts typing the same character and only stops when another key is pressed. What will be the problem?

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andypugh please help.

To be honest, I don't know what the problem is. It's a user-space HAL component and it sounds like it just isn't getting enough CPU time.

Are you running a base thread? How does the base thread execution time compare to the base thread period?

Thank you for your response,
I'm running linuxcnc on a raspberry PI 4, with a 7i92 + 7i73.
but I really don't understand what you mean, could you explain?