The USB I2C/IO interface board is required with the PhynxRGB if used with StreamPix digital recording software for hardware trigger from an external source.
This board provides 20 bits of user-configurable digital I/O, a 90Kbps I²C interface, and an 8 bit wide data bus for fast FIFO transfers.

Triggering with StreamPix

Computer trigger mode gives you the opportunity to control the start or stop of recording using an input line directly connected to the computer.
Currently, this option supports only the Devasys USB I2C/IO module, but future versions will include controls for other devices like all National Instrument devices that include a DIO port or camera and frame grabber that includes some general IO lines.

With computer trigger, and contrary to hardware trigger, this is directly the StreamPix software that is triggered. This allows a smoother control of the operation, and more flexibility, as trig events can be included in some scripting commands.

To enable the computer triggering option, simply check the check box at the top of the window. Note that this page will only be displayed if a compatible trigger source like the Devasys USB IO is connected and correctly installed on your computer.

Select the Trigger Source: Simply select the source you want to use. All trigger sources correctly installed and connected to the computer will be listed here.

Recording Start Condition: Allows you to specify the condition that will initiate the recording. On some IO devices, you also need to specify the pin on which the trigger signal will be connected. The IO module will monitor the specified input line, and notify StreamPix when the specified condition has occurred.

Recording Stop Condition: Allows you to specify the condition that will stop the recording. On some IO devices, you also need to specify the pin on which the trigger signal will be connected. The IO module will monitor the specified input line, and notify StreamPix when the specified condition has occurred.

Note 1: It is possible to specify a different input line for the start and stop condition.

Note 2: It is possible to specify a different condition for the start and stop event. However, if the same source line is used for both the start and stop condition, some conditions are not valid.

Single Snap: This mode will record only one image when the start condition is met. The single snap mode is available when the recording condition is set to rising or falling edge.

Continous: This mode will record all images when the start condition is met.

Polling Delay: Allows you to specify the delay between each reading on the input line. As the module pools the line, a low delay will increase the CPU load. However, a long delay may increase the software response time before it notices a change on the input line. It is not recommended to reduce the pooling delay to a number smaller than 3 times the camera frame rate.

Usage: When enabling the computer trigger, the StreamPix start and stop recording will be controlled by the start and stop event you may have defined. It is, however, still necessary to press the record button on the user interface to begin a recording session. In the same way, it is always possible to stop the recording by depressing the record button even if the stop condition is not met yet.