CAEN VX1190A TDC
CAEN VX1190A multihit TDC, 96 channels
User Manual
File:VX1190A UserManualRev13.pdf
Addressing
From the picture and the above diagram it looks like the module is at the following settings
<bits 19-16>=0x01
<bits 23-20>=0x02
<bits 27-24>=0x08
<bits 31-29>=0x00
ROL initializing
# Address for TDC CAEN 1190
const NC1190 = 1
const C1190_ADDR = 0x210000
const C1190_OFFSET = 0x10000
# Maximum number of 32bit words from C1190
const C1190_MAX_DATA = 128
const C1190_BLOCK_READ = 1
# Note that C1190_ADDR must be A32 for 2eSST, A24 okay for BLT/MBLT
tdc1190Init(C1190_ADDR,C1190_OFFSET,NC1190,1);
tdc1190SetTriggerMatchingMode(i);
tdc1190SetEdgeResolution(i,100);
tdc1190EventFifo(i,0); /* Must be enabled(disabled) for Linked List (direct) DMA */
tdc1190SetBLTEventNumber(i,C1190_BLOCK_READ);
output from ROC_CODA when after download
Initialized TDC ID 0 at address 0xa6b79000 tdc1190SetEdgeResolution(0): Set Edge Resolution to 100 ps
Errors
invalid event pointer
tdc1190ReadBlock: ERROR in DMA transfer Initialization 0xffffffff jlabgefDmaSend: ERROR: the_event pointer is invalid!
gen_int_list.crl
#
# General User readout list
#
# David Abbott, TJNAF 2000
readout list GEN_USER
maximum 1024,512
general readout
# A16 Address for SIS3610 Module
const TRIG_ADDR=0x3800
# Address for TDC CAEN 1190
const NC1190 = 1
const C1190_ADDR = 0x210000
const C1190_OFFSET = 0x10000
# Maximum number of 32bit words from C1190
const C1190_MAX_DATA = 128
const C1190_BLOCK_READ = 1
# Note that C1190_ADDR must be A32 for 2eSST, A24 okay for BLT/MBLT
extern int bigendian_out;
begin download
variable res, i
vmeOpenDefaultWindows();
s3610Init(TRIG_ADDR,0,0);
# When sending to a Linux Host set bigendian_out = 0
bigendian_out = 1;
log inform "Initializing TDC 1190"
# SETUP caen1190
%%
tdc1190Init(C1190_ADDR,C1190_OFFSET,NC1190,1);
tdc1190SetTriggerMatchingMode(0);
tdc1190SetEdgeResolution(0,100);
tdc1190EventFifo(0,0); /* Must be enabled(disabled) for Linked List (direct) DMA */
tdc1190SetBLTEventNumber(0,C1190_BLOCK_READ);
tdc1190BusError(0,C1190_BLOCK_READ); /* 1: BERR/2eTERM for block reads (DMA), 0 for SCT */
/* tdc1190SetWindowWidth(0,51176); */
/* tdc1190SetWindowOffset(0,-800001); */
%%
log inform "User Download Executed"
end download
begin prestart
variable jj, adc_id
log inform "Entering User Prestart"
init trig source GEN
link async trig source GEN 1 to usrtrig and usrtrig_done
event type 1 then read GEN 1
%%
tdc1190Status(0);
%%
log inform "User Prestart Executed"
end prestart
begin end
CDODISABLE(GEN,1,1);
log inform "User End Executed"
end end
begin pause
CDODISABLE(GEN,1,1);
log inform "User Pause Executed"
end pause
begin go
log inform "Entering User Go"
CDOENABLE(GEN,1,1);
end go
begin trigger usrtrig
variable ii, event_ty, event_no, datascan, imod, nwrds
variable evStored
rol->dabufp = (long *) 0;
open event type EVTYPE of BT_UI4
%%
/* Check for valid data here */
for(ii=0;ii<100;ii++)
{
datascan = tdc1190Dready(0);
if (datascan>0)
{
break;
}
}
if(datascan>0)
{
// Get the TDC data from all modules... rflag=1 block read, 0 for SCT
for(imod=0;imod<1;imod++)
{
nwrds = tdc1190ReadBlock(imod,rol->dabufp,C1190_MAX_DATA,C1190_BLOCK_READ);
if(nwrds < 0)
{
logMsg("ERROR: in transfer (event = %d), status = 0x%x\n",
event_no,nwrds);
*rol->dabufp++ = 0xda000bad;
}
else
{
rol->dabufp += nwrds;
}
}
}
else
{
evStored = tdc1190GetEventStored(0);
logMsg("ERROR: Data not ready in event %d evStored = %d\n",event_no,evStored);
*rol->dabufp++ = 0xda000bad;
}
%%
close event
end trigger
begin done usrtrig
end done
begin done
# Re-enable Trigger Source here
s3610IntAck(1);
end done
begin status
end status
ROC EB crash when component released
When the r1dc components are released from the CODA GUI in order to reload the r1dc readoutlist , the SIS3610 will have its VU light go green, CODA_ROC and CODA_EB will crash.
The error message printed to the screen by CODA_EB is
thread exit for rocdaq1 get_cb_data returned end of file ROC mask 8 force_end 2 Segmentation fault
Data Record
General Header:
- bits 0->4 = GEO =0x01000
- bits 5->26 = Event counter
- bits 27->31 = global header = 01000
0x400083a8 = 1000000000000001000001110101000
event number = 0x0000000000010000011101 = 0x41d
0x400083c8 = 1000000000000001000001111001000
event number = 0000000000010000011110 = 0x41E
0x400083e8=1000000000000001000001111101000
event number = 0000000000010000011111 = 0x41F
TDC header
- bits 0->11 = Bunch ID
- bits 12->23 = event id
- bits 24->25 = TDC
- bit 26 nothing
- bits 27->31 = 0x00001
0x841d563 = 0001000010000011101010101100011
TDC = 00 event id=010000011101=41D
0x841efe2 = 0001000010000011110111111100010
00 010000011110=41E
0x841f39f=0001000010000011111001110011111
0001 0 TDC=00 event id=010000011111=41F bunch id=001110011111
TDC measurement
- bits 0->18 = measurement
- bits 19->25= channel
- bit 26: leadng or trailing
- bits 27->31 = 00000
TDC trailer
- bits 0->11 = word count
- bits 12->23 = event ID
- bits 24->25 - TDC
- bits 26 nothing
- bits 27->31 = 0x00011
0x1841d002 =00011000010000011101000000000010
TDC error
bits:0->14 Error flag
- bits 15->23 = blank
- bits 24->25 = TDC #
- bit 26 blank
- bits 27->31=0x00100
Readout
Absolute and relative time
The TDC has 2 methods for recording the hits in Trigger Matching On mode.
You can either record the absolute time by subtracting off the trigger time.
You can write the absolute time with respect to start of the window using the library function call
tdc1190EnableTriggerTimeSubtraction(0); /*TDC records absolute time*/
The recorded time is with respect to the start of the window. The "Trigger" happens at the end of the window. So the higher the TDC value the closer the pulse is to the trigger.