FMS PIC Serial Interface

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This is a brief description of the operation of the FMS PIC serial interface, the interface is design to take the buddy box output of PPM mode transmitters from Futaba, JR, Hitec and sanwa etc, and convert this output to an ASCII data string of the format listed below. It will only work with systems which operate over the range 1 - 2mS.

Use with FMS 2.0 Beta 7

From the 'Controls' menu select 'Analogue control'. From the Interfaces option select 'Serial PIC interface' and then click 'Resources' select the Com port you are using and then for the Protocol make sure you have '9600 Baud / 0xF0+ Sync' selected.

Serial Protocol Used

The serial output is at 9600 baud, 8 data bits, No parity and 1 stop bit. The first character will be in the range 241 to 248 decimal, this is made up from 240 + the number of pulses measured. The second character contains the status of 4 push buttons that can be connected to the interface unit. The third to last (max 16) characters contain the values of the control channel pulses. Decimal 100 = 1mS, 200 = 2mS.

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