SAMD51P - TC Clock Enabling Procedure Incomplete

[fko-kuptec]

I was trying to get a manually configured TC (timer counter) working, however it just wouldn't want to start. Today, I found out that the GenericClockController::tcx_tcy() methods are not sufficient to enable the clocks for a TC instance. Additionally, the corresponding tcx_ bit in the APB mask of the MCLK must be set. Since the GenericClockController consumes MCLK at construction and does not seem to expose direct access to it, I have to set this bit before creating the GenericClockController instance. Now, the timer works.

Maybe I am mistaken, but I would expect these mask bits to be automatically set by the tcx_tcy() methods. Is this intended behaviour?

I don't know, whether this issue only affects the SAMD51P or the other targets as well.

Thank you for your work! 😊