MWPC Configuration and Registers¶
Attached to this wiki page are the registers provided by Sten.
Specific implementations are documented on this page (please update with all information we know about!).To login to the controller do:
$ telnet ftbfwc03 <port>
where the ports are:
- 5000 - daq apps
- 5001 - emergency access
- 5002 - telnet sessions
be sure to log out of the sessions using "^]" (the ^ means ctrl)
Help info can be found in the telnet session by typing he (additional help pages are h1-h4)
Read 16 registers in a row starting from <reg> $ rdi <reg> Read a single register $ rd <reg> Write a register $ wr <reg> <value> Preceding the above commands with "hc <tdc>" where tdc goes from 1-16 (using tdc 0 prints the info for all connected tdcs) Write tdc threshold (input is hex, convert to volts: dec/4095*1.024, where dec is the hex value converted to decimal) $ hc <tdc> wt 8 <hex>
Spill state register 0x0B¶
$ rd b 0002
The return value should cycle between 2 (out of the spill) and 8 (in the spill)
It may be cycling between 1 and 9. This is bad.
If not good, try
$ wr 1 c4If TDCs are not in the correct state, try power cycling:
There are commands to power cycle the controller from telnet:
Reset the tdc ports: $ pwrrst Reset the controller: $ reset
Those power cycles aren't off for long enough and the controller/tdcs may not come back in a happy state.
We have a network controllable power strip to do a hard power cycle.
To log into the strip you can:
- create a tunnel to novabeamlinedaq00 (ssh -D 9999 -f -C -q -N firstname.lastname@example.org) then set up firefox for tunneling.
- or log into the vnc session on novadaqbeamlin00 (ssh -L 5971:localhost:5951 -N -f -l novadaq novabeamlinedaq00.fnal.gov).
Then point firefox to ftbf-pdu08.fnal.gov (ask Mike or Andrew for the username and pw). You can now power cycle the channels connected to the strip
Display current controller and tdc spill headers: p0¶
Very useful to check if the controller is happy
$ p0 Controllers Spill Data Header (15000mS SpillGate) TotalWrdCnt = 0000006A (106 D) SpillCounter = 00000046 (70 D) RTC Year/Mon = 120A (18/10) RTC Day/Hr = F0F (15/15) RTC Min/Sec = 352E (53/46) Trigger Cnt = 00000000 Status Bits = 0 Link Status = 0 TDC Spill Hdrs (1 <= 16) Input Words TDCnum TrgCnt Status 1 00000006 0001 00000000 0008 2 00000006 0002 00000000 0008 3 00000006 0003 00000000 0008 4 00000006 0004 00000000 0008 5 00000006 0005 00000000 0008 6 00000006 0006 00000000 0008 7 00000006 0007 00000000 0008 8 00000006 0008 00000000 0008 9 00000006 0009 00000000 0008 10 00000006 000A 00000000 0008 11 00000006 000B 00000000 0008 12 00000006 000C 00000000 0008 13 00000006 000D 00000000 0008 14 00000006 000E 00000000 0008 15 00000006 000F 00000000 0008 16 00000006 0010 00000000 0008Things to check
- The spill counter is incrementing
- Trigger counts match between tdcs and controller
- tdc status is 8 (anything else, usually 9, is bad)
- tdc numbers are correct (if the controller is in a bad state they may be very crazy)
Setting are registers 7D, 7E, and 7F
$ rdi 70 0 0 9 9 9 9 9 9 0 0 9 9 0 0 6 2 The last 3 are the pulser settings
7D sets the rate (convert the value from hex to decimal then multiply by 0.0247 to get the Hz)
7E is the spill width (convert to decimal to get width in seconds)
7F is the inter-spill width (the dead time between spills)
Setting register 1 to EC turns on the pulser (E0 resets spill info and 0C turns on the pulser)
Setting register 1 to E4 turns off the pulser
See the register document for more info on register 1
$ rdi 20 4c 4c 4c 4c 4c 4c 4c 4c 4c 4c 4c 4c 4c 4c 4c 4c
Should all be in sync. If not...
wr 1 4c
to, for example, write register 1 (second).