Berry tasmota.micros() to get time in microseconds

[s-hadinger]

Description:

New function to get current time in microseconds to get finer measurement than tasmota.millis(). Be careful that the counter changes sign every hour.

Also changed tasmota.millis() to a static method.

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.8
• The code change is tested and works with Tasmota core ESP32 V.3.1.6
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass

[Jason2866]

@s-hadinger This changes are breaking the haspmota Watch 480x480 Demo TAPP.
Probably not just this demo.

[arendst]

I guess this needs be if (top == 1) {

[s-hadinger]

Normally no, because it is now a static method, so it does not have the default self first argument.

Let's revert this PR so we can identify the breaking change. I suppose that there is some code that expects 'tasmota.millis()' to being not static

[arendst]

I see a miscommunication coming.

The change from line 122 is in your failing PR. My suggestion is in line 124 which will never execute when line 122 is changed that way.

In the meantime @Jason2866 tested my change with success so....

[Jason2866]

micros is really short. Makes this sense in general in Berry?

[s-hadinger]

Yes it does. I’m doing profiling for leds animation on a very slow esp32s2 so it magnifies performance issues. In such cases, milliseconds is too coarse