8 Rapid-Time Logger

Previously, with the Communication Logger feature, viewing of the additional data elements provided in each FSI packet was enabled. The Rapid-Time Logger takes advantage of these additional elements by using the User Data element to encode the type of logging message and the Frame Type element to store which variable from the application is being sent. This form of data logging is the fastest because this form leverages the FSI packaging features unique to the FSI protocol as the packaging layer of the application. With the setups shown in Section 2.3 or Section 2.4, the Rapid-Time Logger feature can be used on the primary device in conjunction with a special implementation of the Communication Logger feature on the bridge device.

This feature is commonly used for debugging or viewing of application variables when the primary application has tight timing requirements. The full utilization of the FSI protocol features on the primary device allow for fast and optimized transmission of data. In conjunction, the bridge device extracts the data from every FSI element and transmits to the PC (either directly by the USB peripheral or through the secondary UART-to-USB bridge device using UART). A JSON file containing the encodings for each application variable and message type is generated by the Rapid-Time Logger Sysconfig module for use by the GUI application. This allows each data packet to display meaningfully in the GUI without the need to transmit extra characters in the FSI packet.