mirror of https://github.com/joan2937/pigpio
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pigpio is a C library for the Raspberry which allows control of the
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General Purpose Input Outputs (GPIO).
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**At the moment pigpio on the Pi4B is experimental. I am not sure if the DMA channels
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being used are safe. The Pi4B defaults are primary channel 7, secondary channel 6.
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If these channels do not work you will have to experiment. You can set the channels
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used by the pigpio daemon by invoking it with the -d and -e options, e.g.
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<small>sudo pigpiod -d 5 -e 8</small> to specify primary 5, secondary 8.**
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## Features
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* Sampling and time-stamping of GPIO 0-31 between 100,000 and 1,000,000 times per second
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