HW clock division possible with TX2? (30hz => 5 hz, low latency is main goal)

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

Is there a way to do HW-assisted clock division with the TX2 with a clock coming in via GPIO? e.g. perhaps the PWM frequency divider can be fed from a GPIO pin? Even a hack approach would be interesting, as long as I don’t have to deal with Linux kernel latency doing GPIO.

This is very low frequency, the clock would be 30hz. The reason for looking for a HW approach is the latency needs to be very low, ideally in the microsecond range, though I’ll take what I can get ;-)

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Hi, please refer to this topic: [url]https://devtalk.nvidia.com/default/topic/1052140/jetson-tx2/can-i-make-a-25mhz-pwm-signal-/post/5344004/#5344004[/url]

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Hi Trumany! Thanks for your response, I had looked at that thread before, but it doesn’t cover the possibility of using an external clock source fed via GPIO. Maybe the answer is “you can’t”.

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GPIO can be set as input of external clock. The sampling rate is up to about 50Khz.