feat: Convert PPM_UNIT build option to runtime radio setting

[philmoz]

Replace the PPM_UNIT build option with runtime code and a setting in the radio data for option selection.

B&W radios, color radios and companion updated.

[raphaelcoeffic]

@philmoz Woah! That was fast! I have only one remark: we should probably have 0.0 be the default format. I believe this is the default compilation option.

[philmoz]

I have only one remark: we should probably have 0.0 be the default format. I believe this is the default compilation option.

If no PPM_UNIT is specified in the build options it defaults to PPM_UNIT_PERCENT_PREC0 (no decimal).

[raphaelcoeffic]

If no PPM_UNIT is specified in the build options it defaults to PPM_UNIT_PERCENT_PREC0 (no decimal).

Ok, my bad :-D

[3djc]

I have only one remark: we should probably have 0.0 be the default format. I believe this is the default compilation option.

If no PPM_UNIT is specified in the build options it defaults to PPM_UNIT_PERCENT_PREC0 (no decimal).

Indeed, it was changed fairly recently, as PREC1 really doesn't give any benefit

[pfeerick]

LGTM, and I love how this seems to have ended up with slightly smaller firmware for both colorlcd and b&w then main (after rebasing and self-compiling)!! Also shows up where the colorlcd UI has very support for the PPM_UNIT option.

Tested on X9D+2019 w/ Companion sync, as well as TX16S, 128x64 only simulator tested.

[sande005]

WhooHoo! Hadn't followed up on my #3163, waiting till flying season was over to see if anything has happened - either fix the build process, or add an enhancement. Very happy to see this coming in 2.10! Thank you!

[sande005]

Unfortunately, not what was asked for in #3163 - was expecting to see ppmus values in max/min under outputs, as can be done with selecting the build option for OpenTX. Per #3163, prior custom build for ppmus did not work. Have not tested custom build to see if that issue has been resolved in ver 2.10 rc4.

[pfeerick]

Well, only half of what was asked (although probably the more important half)... it is now no longer a build time option, but a runtime option, but I don't think controls have been converted over fully on colorlcd. B&W radios should honor the setting better. This will need a new issue now (done: #4977), as the old one is no longer correct since it is not a build time option any more. I don't think -DPPM_UNIT_US was every valid anyway (yet?) for colorlcd - which is one of the reasons you can only pick PREC0 and PREC1 (0.0, 0.00).