#319 [MCS51] Add header for STC89Cxx MCUs

[Diego Elio Pettenò]

Hi folks, I'm finding myself to write code for an STC89 micro[1] and I thought I would provide an header file for it (attached).

The register configuration appears to be a hybrid between the STC12 series, and the AT89x52 series. I've documented the registers the same way as stc12.h documents them, following the datasheet provided by STC.

HTH!
Flameeyes

[1] https://flameeyes.blog/2020/03/30/birch-books-smart-home/

[Philipp Klaus Krause]

Thanks. Applied in [r11650].

[Philipp Klaus Krause]

I clearly did a bad job at reviewing this. Source including this header doesn't even compile. I have been pointed to the problems by a user via email.

@dgp85, could you please have a look,? There is a stray H, and if I fix that, I get errors about duplicate symbols.

[Philipp Klaus Krause]

Fixed in [r13900].