add back TWI clock stretching option

[stnolting]

requested by @NikLeberg in #865 (comment)

[stnolting]

@NikLeberg

Do you have a peripheral device available that actually makes use of clock stretching? The simple port expanders and EEPROMs on my desk are also happy without this function.

[NikLeberg]

Hi @stnolting, thanks for swiftly bringing this back!

At home I do have the mentioned BNO055 and could test it... but I'm on pretty long backpacker holidays 😇. So I don't have access currently to it for a few months.

Maybe I can come up with a way to simulate and test it.

[stnolting]

but I'm on pretty long backpacker holidays 😇

Now that sounds nice! Which continent are you exploring?

Maybe I can come up with a way to simulate and test it.

Let's just merge this for now going back to the previous clock stretching mechanism.

[NikLeberg]

Now that sounds nice! Which continent are you exploring?

We did India, currently Nepal and soon south-east asia with Thailand, Vietnam and more. Lets see. Gonna be a few more months. 🏝🤗

[stnolting]

Asia is nice. Definitely one of my 7 favorite continents! 😄
Have fun!