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HAL counter API
Hardware Abstraction Layer
» List of HAL APIs
» HAL counter API
The HAL must supply a counter that varies rapidly, appropriate for use for sub-millisecond timing. On many systems, this counter will form part of timer 0 – as such it is not required to operate when timer 0 is not running. On other systems, the periodic timers may have no readable latch, and a separate unit will be required.
The counter should count down from (period-1) to 0 continuously.