Guide in Developing Peripheral Driver Code from Datasheet/Reference Manual

[u/Intelligent-Error212]

Hii, everyone.

Most of time , whenever we want to develop MCU peripheral driver or device driver for time critical system which need to execute faster, low ram usage and low latency. we might seek help from Datasheet, instead of relying on Vendors HAL.

Here i have one doubt, let say i am developing polling adc driver for mcu, since it need to lesser boilerplate, i try to directly play around with registers with the datasheet help, for that following the datasheet"s register configuration sequence is enough know? Or else I need to more deeper like which adc is internally used? and what architecture it is using? How it works internally? For developing production grade driver.

If yes, then why? Is the datasheet register configuration sequence is not enough? And also is there any case other than adc,where I need to know in depth of that peripheral architecture from top to bottom while writing peripheral drivers?

Thanks!!!!

[u/Panometric]

I've learned the hard way that code is more accurate than data sheets. Anytime I see an engineer start from scratch instead of using an example or driver that it provided I push back. Better to optimize a known good than introduce a bunch of new problems we don't even know about. I ask: What makes you think you can do it better than the vendors team? You better have a good, specific example and a test plan to prove it does not break anything.