feat: Flysky Noble 4 Plus (NB4+) support

[richardclli]

Flysky Noble 4 Plus (NB4+) Support

Development progress:

• LCD drver
• touch driver
• ST, TH
• pots
• switches
• trims
• encoder (the hardware has 2 encoders, once mapped one currently, need some input to how to make use 2nd encoder)
• audio
• battery charging
• internal module (STM32F030 MCU nothing good can be supported)
• external module (Bluetooth USART3 port, mapped as internal module that can support MULTI/AFHDS3/CRSF)
• modding documentation https://github.com/EdgeTX/edgetx/wiki/Flysky-NB4--Hardware-Mod-for-Complete-EdgeTX-Support

Known hardware limitations:

1. No on board RTC support, missing battery and a few cap, diode, crystal components. (PL18 is a lot simpler, just need to add a battery)
2. NOR flash is small (Only 8MB on board, can change the chip to maximum 128MB, same as PL18 mod)
3. DAC sound output work out of the box without modding ^.^

[pfeerick]

Functionally everything is looking good for the first round for this handset.

Obviously a few more details to figure out, such as using the second rotary encoder, trying to do something more with the build in internal module (i.e. PPM so it does something rather than nothing).

Two very minor cosmetic issues - bootloader green tick drew over text and Radio Settings -> Hardware -> Pots is not portrait friendly.

[pfeerick]

Does this radio have a trainer port? As trainer thinks it can show master/slave jack settings.

Do the trim hats have anything more than the up/down outputs (electrically) - one axis does something, does the other do anything, and what about pressing on them - i.e. any TODOs there?

[gagarinlg]

Some trims are not working
I get "missing or bad radio data" at every boot
I was not able to enter the bootloader
TR1 and TR2 have only one axis working
TR3 and TR4 do not work
I think the steering wheel should be reversed

[pfeerick]

• Bootloader - you use the two buttons on each side the centre grip - SW1/SW2
• bad or missing data - is the SPI flash formatted?
• T3 should work - it is the main input rotary encoder - you can use it + SW1 and SW2 for UI input - scroll, enter, exit
• T4 is the unused rotary encoder I referenced above

[gagarinlg]

I did not format the flash, did it now, works better than before

[gagarinlg]

• Bootloader - you use the two buttons on each side the centre grip - SW1/SW2

  • bad or missing data - is the SPI flash formatted?

  • T3 should work - it is the main input rotary encoder - you can use it + SW1 and SW2 for UI input - scroll, enter, exit

  • T4 is the unused rotary encoder I referenced above

ok, then I think we should merge this,