In this use case, the TC will be used as a timer, to generate overflow and compare match callbacks. In the callbacks the on-board LED is toggled.
The TC module will be set up as follows:
GCLK generator 1 (GCLK 32K) clock source
16-bit resolution on the counter
Prescaler is divided by 64
GCLK reload action
Count upward
Don't run in standby
No waveform outputs
No capture enabled
Don't perform one-shot operations
No event input enabled
No event action
No event generation enabled
Counter starts on 0
Counter top set to 2000 (about 4s) and generate overflow callback
Channel 0 is set to compare and match value 900 and generate callback
Channel 1 is set to compare and match value 930 and generate callback