v2.x WDT & RTC libraries

[adamgarbo]

Hi @Wenn0101 ,

Here is the rewritten WDT library for v2.x of the Apollo3 Core. I based it on the format of the RTC library that @oclyke rewrote for v2.x

I've standardized the RTC and WDT intra-library instantiations, so the objects are now wdt and rtc (lowercase). This is handy, though I suspect some users may like to have more control over how they create their objects.

I also fixed the low-power examples with some assistance from @paulvha. As UART is handled differently now with Mbed OS, I simply modified the low power code so that it manually disables/reenables the UART0 TX/RX pins. It was also necessary to enable the lower 512K of memory since v2.x code is 10x the size of v1.x (Mbed is a hog).

All examples compile using a SparkFun Redboard Artemis.

Happy to assist further or make any necessary changes.

Cheers,
Adam

[jerabaul29]

Any plans to merge this into main?

[adamgarbo]

Hi @jerabaul29,

I suspect this will likely be included with v2.1. However, I believe more testing is required. I recently tested the libraries in a larger project and have been observing some strange behaviour with alarm interrupts failing to trigger, or triggering prematurely, which is perhaps due to the RTC/WSR ISRs.

I'm actively looking into this.

Cheers,
Adam

[Wenn0101]

^ Yep. Hoping to include this functionality in v2.1.0.

I will be doing more testing in the coming week.

[adamgarbo]

@Wenn0101, after some good discussions on the forums, I've updated the low power code to the correct way of powering down the memory. Up until now, all previous examples have been doing so incorrectly. It is 100% confirmed not to brick your board!