drivers/analog/ads1115.h: Add ioctl for conversion trigger #16715
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acassis
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Since the ADS1115 has a relative slow conversion rate, this additional ioctl command makes it possible to trigger a conversion before reading the reading the conversion result, allowing the user to perform other computation in between instead of waiting for the conversion time to complete. It improves sampling time. Signed-off-by: Matteo Golin <matteo.golin@gmail.com>
Updates the ADS1115 documentation with information about the two new commands for triggering conversion and reading the result. Signed-off-by: Matteo Golin <matteo.golin@gmail.com>
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Summary
Since the ADS1115 has a relatively slow conversion rate, this additional ioctl command makes it possible to trigger a conversion before reading the reading the conversion result, allowing the user to perform other computation in between instead of waiting for the conversion time to complete. It improves sampling time.
Impact
Users can parallelize sampling of the ADS1115 ADC to avoid delays from sleeping while waiting for the conversion time duration.
Testing
Tested on a rocketry system with 4 ADS1115s in the sensor array. This change allowed parallezation to speed up sampling from 10Hz to 15Hz per channel per ADC.
@bskdany performed this testing, as did I.