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>
The ADS1115 driver uses the `nxsig_usleep()` function to sleep for a
65us delay, but with a 1ms tick resolution and the context-switching
overhead, this is much more than 1ms. Introducing `up_udelay` (even with
a larger duration because of the unreliability of busy-waiting) speeds
up sampling noticeably.
Signed-off-by: Matteo Golin <matteo.golin@gmail.com>
This patch adds initial support for the Texas Instruments ADS1115 ADC.
Please read the documentation for more details.
Signed-off-by: Tony Lin <99093620+justapotato213@users.noreply.github.com>
