Reduce Memory Usage about simba

[softov]

Oh man, I live in a cave, programming day and night.
I will edit/test some codes tomorrow and learn how to create a PR to this.

In time, I will create another issue about the UART.

[eerimoq]

Hello,

I think I like the idea of using 1 bit per boolean in structs. Would save some precious RAM indeed. Feel free to create a PR introducing them in a few structs (those relevant to you), and it will probably be merged. The only drawback is that flash usage may increase slightly, but flash usage is not as critical as RAM.

PS. I this the UART soft driver cannot handle simultaneous TX and RX. I strongly recommend you to use the non-soft driver, often automatically started as the console which uses stdin and stdout. DS.