Add P12V0 switch for EEMs

[marmeladapk]

Somewhere here, and switch P12V0 for EEMs only after FPGA is programmed.

Edit: And P3V3

[gkasprow]

That wont work because many boards have independent supply. But in DIOT we might use servmod line to control supplies

[sbourdeauducq]

That wont work because many boards have independent supply.

Which ones? As far as I can tell this will work for all the popular boards.

[gkasprow]

Most boards don't use external power connectors, but we have a few that do:
HVAMP32
HVAMP8
SILPA
Thermostat EEM
Stabilizer
Magneto (new one)
HV_PSU
VHF_AMP(new one)

Having even one of them in the crate will make such switching impossible and cause an unintended flow of current.

[sbourdeauducq]

HVAMP32
HVAMP8

AFAIK those just have unidirectional inputs and cannot cause the original latchup problem?

SILPA
Thermostat EEM
Stabilizer

Those are not usually connected to Kasli and run independently.

[gkasprow]

HVAMP8

AFAIK those just have unidirectional inputs and cannot cause the original latchup problem?

But they short 12V from EEM to external 12V and will supply other boards anyway

SILPA

Those are not usually connected to Kasli and run independently.

It can also work as EEM; we even have an ARTIQ driver.

[marmeladapk]

Still these cards will be in minority of setups, so we could protect most of them. Later in DIOT we won't need that anyway.

[sbourdeauducq]

Absolutely and even for them it looks like there are simple solutions with legacy IDC. The main problem comes from the vendor locked-in proprietary Altium format.