Difference between revisions of "Trigger 393"

Latest revision as of 10:45, 10 April 2022

Description

10389 board is required (and possibly 103891).

Use cases:

Trigger a single camera from external source
Synchronize multiple cameras to a master camera or external trigger source
Program frame rate

The conditions of the trigger can be generated either internally or externally:

for external triggering a 103891 board and a 4-conductor 2.5mm audio plug with cable (example: digikey) is required.
for internal triggering use J4-J6 connectors with a 4-pin flex cable: J4 - internal trigger source (also transmits timestamps that can be decoded by other cameras), J5-6 - receive trigger

To program trigger go to: http://192.168.0.9/parsedit.php => External Trigger Controls

NOTE: Be careful with changing parameters when TRIG=4. Camera drivers are driven by the frame sync interrupts from the sensor, so if the sensor is not triggered - everything can get stuck. The Program Ahead value sets the number of frame sync interrupts the camera will wait wait for until a parameter is reprogrammed.

External Trigger Controls page

Parameters

parameter	description
TRIG	Trigger mode. 0x0 - free running, 0x4 - triggered by external signal or FPGA timing generator, 0x14 - triggered in GRR mode
TRIG_MASTER	Master sensor_port (0..3) for triggering setup, other ports will have settings duplicated
TRIG_CONDITION	FPGA trigger sequencer trigger condition, 0 - internal, else dibits: 00 - do not use, 01 - keep, 10 - active low, 11 - active high for each GPIO[9:0] pin). 10389 board inverts signals, so 0x80000 - input from external connector, 0x08000 - input from internal flex cable (as in Eyesis)
TRIG_DELAY	FPGA trigger sequencer trigger delay, 32 bits in pixel clocks (100MHz or 10ns)
TRIG_OUT	FPGA trigger sequencer trigger output to GPIO, dibits: 00 - do not use, 01 - keep, 10 - active low GPIO output, 11 - active high GPIO output. 10389 board inverts signals, so 0x02000 - output to external connector (active high), 0x20000 - output to internal flex connector
TRIG_PERIOD	FPGA trigger sequencer output sync period (32 bits, in pixel clocks (100MHz or 10ns)). 0- stop. 1 - single, >=256 repetitive with specified period
TRIG_BITLENGTH	Bit length minus 1 (in pixel clock cycles) when transmitting/receiving timestamps, without timestamps the output pulse width is 8*(TRIG_BITLENGTH+1). Legal values 2..255
EXTERN_TIMESTAMP	When 1 camera will use external timestamp (received over inter-camera synchronization cable) if it is available (no action when external syncronization is not connected), when 0 - local timestamp will be used
XMIT_TIMESTAMP	Specify output signal sent through internal/external connector (defined by TRIG_OUT). 0 - transmit just sync pulse (8(TRIG_BITLENGTH+1) pixel clock periods long), 1 - pulse+timestamp 64(TRIG_BITLENGTH+1) pixel clock periods long

Examples

Internal periodic trigger (10 fps, from fpga generator)

http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_CONDITION=0&TRIG_PERIOD=10000000&TRIG=4

Internal periodic trigger (4 fps, from fpga generator) + output the signal to external port

http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_CONDITION=0&TRIG_OUT=0x66555&TRIG_PERIOD=25000000&TRIG=4

External trigger receive (with possible self-triggering loop)

Here, internal generator is routed to sync the cable output wires. If the output wires are connected to the input wires (red+black and white+green) the camera will be self-triggering. If the wires are not connected - use external source - apply "plus" to black, "minus" to green (check colors and pinout):

http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_CONDITION=0x95555&TRIG_OUT=0x66555&TRIG_PERIOD=100000000&TRIG=4

at the same time the fpga generator outputs a 1 fps signal - if the sync cable wires are properly connected the camera can be triggered from this 'external' signal

External trigger receive (external source only)

The sync cable wires can be looped or not - does not matter.

http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_CONDITION=0x95555&TRIG_OUT=0x66555&TRIG_PERIOD=100000000&TRIG=4

at the same time the fpga generator outputs a 1 fps signal - if the sync cable wires are properly connected the camera can be triggered from this 'external' signal

Recover from missing external trigger signal to internal trigger

http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_CONDITION=0*-2
- *-2 - apply value parameter in the current frame (if not specified, the default is 3)

Manual triggering from PC

Enable

http://192.168.0.9:2323/trig/pointers

TRIG=4 should be set in advance
The command automatically sets a single-shot trigger mode with TRIG_PERIOD=0x1, but it writes the register directly into the FPGA,

not updating the TRIG_PERIOD in the PHP interface:

http://192.168.0.9/parsedit.php?TRIG&TRIG_CONDITION&TRIG_DELAY&TRIG_OUT&TRIG_PERIOD&TRIG_BITLENGTH&EXTERN_TIMESTAMP&XMIT_TIMESTAMP&refresh

Trigger/Refresh

http://192.168.0.9:8081/trig/pointers

Check status

http://192.168.0.9/parsedit.php?immediate&TRIG&TRIG_PERIOD&SENS_AVAIL&FRAME

Disable

Update the TRIG_PERIOD in the current frame

http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_PERIOD=10000000*-2

Update the TRIG_PERIOD from the user interface

http://192.168.0.9/parsedit.php?TRIG&TRIG_CONDITION&TRIG_DELAY&TRIG_OUT&TRIG_PERIOD&TRIG_BITLENGTH&EXTERN_TIMESTAMP&XMIT_TIMESTAMP&refresh
Refresh until the changes are applied (with Program Ahead = 3 it's 3 times):

http://192.168.0.9:8081/trig/pointers

Links

10389 extension board
103891 adapter board for external trigger connection

10389 trigger testing

External connector

In this test the camera triggers itself via audio cable. For cable wiring see 103891.

To test:

- connect a sensor to port 0
- http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_CONDITION=0&TRIG_OUT=0x66555&TRIG_PERIOD=25000000&TRIG=4
visual: LED is blinking
software: frame counter is running

It's easy to modify the cable to trigger itself and other multiple cameras by connecting together red and black wires (+) and white with green (-). For self-testing (external trigger loop back) it is sufficient, for LED - connect anode to "+" (red+black), cathode - to "-" (white+green).

Turn on external trigger loop back (cable should be inserted):

http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_CONDITION=0x80000&TRIG_OUT=0x66555&TRIG_PERIOD=25000000&TRIG=4

Or use interactive page:

http://192.168.0.9/parsedit.php?sensor_port=0&embed=0.25&title=Parameters+for+groups:+trigger+&TRIG&TRIG_MASTER&TRIG_CONDITION=0x80000&TRIG_DELAY&TRIG_OUT=0x66555&TRIG_PERIOD=25000000&TRIG_BITLENGTH&EXTERN_TIMESTAMP&XMIT_TIMESTAMP&TRIG_DECIMATE&THIS_FRAME&refresh

And then click "Apply" button.

Both variants should turn camera into external loop back mode with 0.25s period (4 fps). If the page (and the camera) hangs, the loop is not working. For troubleshooting you may restart the camera, open

http://192.168.0.9/parsedit.php?sensor_port=0&embed=0.25&title=Parameters+for+groups:+trigger+&TRIG&TRIG_MASTER&TRIG_CONDITION=0&TRIG_DELAY&TRIG_OUT=0x66555&TRIG_PERIOD=25000000&TRIG_BITLENGTH&EXTERN_TIMESTAMP&XMIT_TIMESTAMP&TRIG_DECIMATE&THIS_FRAME&refresh

and press "apply". The camera will continue using internal trigger (TRIG_CONDITION=0) but still generate trigger output (TRIG_OUT=0x66555). This output can be controlled by either the LED soldered to the cable or the oscilloscope (ground to the green+white, signal - red+black - it should show not just a pulse but a encoded timestamp some 22us long. Changing TRIG_CONDITION to 0x80000 (enter 80000 into "New value/Hex" field without "0x" and press "Apply") should activate loop back, and if it works then "Refresh" button should cause new "THIS_FRAME" field value. If it does not work - trigger input does not reach camera - bad cable or connector.

Internal connectors

In this test the camera triggers itself via 4-pin flex cable.

Connect as displayed on the pictures below.
- J4 - trigger output (master port)
- J5-J6 - trigger input (slave ports)
To test:

- connect a sensor to port 0
- http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_CONDITION=0x8000&TRIG_OUT=0x66555&TRIG_PERIOD=25000000&TRIG=4
software: frame counter is running

To sync multiple camera, example:

cable 1: camera1 (J4) -> camera2 (J6)
cable 2: camera2 (J5) -> camera3 (J6)
cable 3: camera3 (J5) -> camera4 (J6)
etc.

Sync example: from external to internal (chaining)

The simplest synchronization would be making a custom audio cable to sync all cameras in the system
In case there are multiple cameras in the same enclosure it might make sense to sync them by chaining using 4-pin flex cables

@@ Line 1: / Line 1: @@
 ==<font color="blue">Description</font>==
-board is required.
+[[10389]] board is required (and possibly [[103891]]).
-The triggering is used for one or several cameras synchronization or setting the frame rate (or fps). The conditions of the trigger can be generated either internally or externally. For external triggering a 4-conductor 2.5mm audio plug with cable (example: [http://www.digikey.com/products/en?keywords=839-1029-ND digikey]) is required.
+Use cases:
+* Trigger a single camera from external source
+* Synchronize multiple cameras to a master camera or external trigger source
+* Program frame rate
+The conditions of the trigger can be generated either internally or externally:
+* for external triggering a [[103891]] board and a 4-conductor 2.5mm audio plug with cable (example: [http://www.digikey.com/products/en?keywords=839-1029-ND digikey]) is required.
+* for internal triggering use J4-J6 connectors with a 4-pin flex cable: J4 - internal trigger source (also transmits timestamps that can be decoded by other cameras), J5-6 - receive trigger
 To program trigger go to: '''http://192.168.0.9/parsedit.php => External Trigger Controls'''
@@ Line 52: / Line 59: @@
 * http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_CONDITION=0&TRIG_OUT=0x66555&TRIG_PERIOD=25000000&TRIG=4
-===External trigger receive===
+===External trigger receive (with possible self-triggering loop)===
-* http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_CONDITION=0x95555&TRIG_OUT=0x66555&TRIG_PERIOD=100000000&TRIG=4
+Here, internal generator is routed to sync the cable output wires.
+'''If the output wires are connected to the input wires (red+black and white+green) the camera will be self-triggering. '''
+If the wires are not connected - use external source - apply "plus" to black, "minus" to green ([[103891|check colors and pinout]]):
+ http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_CONDITION=0x95555&TRIG_OUT=0x66555&TRIG_PERIOD=100000000&TRIG=4
+* at the same time the fpga generator outputs a 1 fps signal - if the sync cable wires are properly connected the camera can be triggered from this 'external' signal
+===External trigger receive (external source only)===
+The sync cable wires can be looped or not - does not matter.
+ http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_CONDITION=0x95555&TRIG_OUT=0x66555&TRIG_PERIOD=100000000&TRIG=4
 * at the same time the fpga generator outputs a 1 fps signal - if the sync cable wires are properly connected the camera can be triggered from this 'external' signal
@@ Line 91: / Line 107: @@
 * [[10389]] extension board
 * [[103891]] adapter board for external trigger connection
+==<font color="blue">10389 trigger testing</font>==
+===External connector===
+In this test the camera triggers itself via audio cable. For cable wiring see [[103891]].
+* To test:
+ - connect a sensor to port 0
+ - http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_CONDITION=0&TRIG_OUT=0x66555&TRIG_PERIOD=25000000&TRIG=4
+ visual: LED is blinking
+ software: frame counter is running
+* It's easy to modify the cable to trigger itself and other multiple cameras by connecting together red and black wires (+) and white with green (-). For self-testing (external trigger loop back) it is sufficient, for LED - connect anode to "+" (red+black), cathode - to "-" (white+green).
+{|
+|[[File:10389 extsync selftest.jpeg|thumb|400px]]
+|}
+Turn on external trigger loop back (cable should be inserted):
+ http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_CONDITION=0x80000&TRIG_OUT=0x66555&TRIG_PERIOD=25000000&TRIG=4
+Or use interactive page:
+ http://192.168.0.9/parsedit.php?sensor_port=0&embed=0.25&title=Parameters+for+groups:+trigger+&TRIG&TRIG_MASTER&TRIG_CONDITION=0x80000&TRIG_DELAY&TRIG_OUT=0x66555&TRIG_PERIOD=25000000&TRIG_BITLENGTH&EXTERN_TIMESTAMP&XMIT_TIMESTAMP&TRIG_DECIMATE&THIS_FRAME&refresh
+And then click "Apply" button.
+Both variants should turn camera into external loop back mode with 0.25s period (4 fps). If the page (and the camera) hangs, the loop is not working. For troubleshooting you may restart the camera, open
+ http://192.168.0.9/parsedit.php?sensor_port=0&embed=0.25&title=Parameters+for+groups:+trigger+&TRIG&TRIG_MASTER&TRIG_CONDITION=0&TRIG_DELAY&TRIG_OUT=0x66555&TRIG_PERIOD=25000000&TRIG_BITLENGTH&EXTERN_TIMESTAMP&XMIT_TIMESTAMP&TRIG_DECIMATE&THIS_FRAME&refresh
+and press "apply". The camera will continue using internal trigger (TRIG_CONDITION=0) but still generate trigger output (TRIG_OUT=0x66555). This output can be controlled by either the LED soldered to the cable or the oscilloscope (ground to the green+white, signal - red+black - it should show not just a pulse but a encoded timestamp some 22us long. Changing TRIG_CONDITION to 0x80000 (enter 80000 into "New value/Hex" field without "0x" and press "Apply") should activate loop back, and if it works then "Refresh" button should cause new "THIS_FRAME" field value. If it does not work - trigger input does not reach camera - bad cable or connector.
+===Internal connectors===
+In this test the camera triggers itself via 4-pin flex cable.
+* Connect as displayed on the pictures below.
+** J4 - trigger output (master port)
+** J5-J6 - trigger input (slave ports)
+* To test:
+ - connect a sensor to port 0
+ - http://192.168.0.9/parsedit.php?sensor_port=0&immediate&TRIG_CONDITION=0x8000&TRIG_OUT=0x66555&TRIG_PERIOD=25000000&TRIG=4
+ software: frame counter is running
+* To sync multiple camera, example:
+ cable 1: camera1 (J4) -> camera2 (J6)
+ cable 2: camera2 (J5) -> camera3 (J6)
+ cable 3: camera3 (J5) -> camera4 (J6)
+ etc.
+{|
+|valign='top'|[[File:10389 intsync selftest.jpeg|thumb|400px]]
+|valign='top'|[[File:10389 intsync selftest closeup.jpeg|thumb|400px]]
+|}
+===Sync example: from external to internal (chaining)===
+* The simplest synchronization would be making a custom audio cable to sync all cameras in the system
+* In case there are multiple cameras in the same enclosure it might make sense to sync them by chaining using 4-pin flex cables
+{|
+|valign='top'|[[File:10389 sync example 1.jpeg|thumb|400px]]
+|}
 [[Category:393]]

Difference between revisions of "Trigger 393"

Latest revision as of 10:45, 10 April 2022

Contents

Description

Parameters

Examples

Internal periodic trigger (10 fps, from fpga generator)

Internal periodic trigger (4 fps, from fpga generator) + output the signal to external port

External trigger receive (with possible self-triggering loop)

External trigger receive (external source only)

Recover from missing external trigger signal to internal trigger

Manual triggering from PC

Enable

Trigger/Refresh

Check status

Disable

Update the TRIG_PERIOD in the current frame

Update the TRIG_PERIOD from the user interface

Links

10389 trigger testing

External connector

Internal connectors

Sync example: from external to internal (chaining)

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