Feat(firc calibration): feature request.

[egan-ru]

feature

[i]When using the download software provided by STC to download the user program, the system will automatically set the VRTRIM and IRTRIM registers according to the frequency set by the user.[/i] - stc8h datasheet, 7.4.4 Interpretation of high precision parameters in chip.

possible solution

Port the calibration routine from stcgal.