MSFS2020 PMDG 737 700 Chrono unit functions implemented in Mobiflight

The PMDG 737-700 is a popular aircraft in MSFS2020. However, the Chrono unit displays are not available from the simulator as variables, so it is currently impossible to read the Chrono display data and display it, as you would the MCP heading setting display. This work attempts to mimic the behavior of these displays by redoing all the modes (date, local time, elapsed time, etc) logic of this unit in RPN and managed entirely inside of Mobiflight.

The main output is intended to be to two 4-digit led displays, with the possibility of driving a stepper motor to move the second hand

Due to Github file naming restrictions, the file extension was changed to txt. You can download the file and rename it taking the .txt extension for use in the Mobiflight Connector app.

CHRONO_737.mcc.txt

Input configs

Eight buttons are used for input. The hardware side is basically eight buttons and 2x four digit 7 segment displays. I have also provided a seconds counter that can be used with a stepper moving the chrono unit second hand. The button input events will also control the sim chrono unit, but unfortunately due to the extensive use of custom lvars for the external unit modes, using the onscreen buttons will cause the external unit and buttons to be out of sync.

Output configs

The file also contains the 38 output configs to control all the different possible modes of this Chrono unit and correctly display them to their respective fields.