Simon Arlott c93935f243
Durgod: Increase scan rate by using wait_us GPT timer (#14091)
Lower the tick rate from 10kHz to 1kHz (otherwise all the extra interrupts
reduce the achievable scan rate). Enable the WAIT_US_TIMER using GPT TIM3.

Observed scan rate on the K320 is increased from 625Hz to 2090-2120Hz.
2021-12-27 14:04:26 +11:00
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