Messages in this thread |  | | From | Andy Shevchenko <> | Date | Tue, 5 Jul 2022 00:02:08 +0200 | Subject | Re: [PATCH v3 9/9] iio: adc: mcp3911: add support to set PGA |
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On Mon, Jul 4, 2022 at 7:23 PM Marcus Folkesson <marcus.folkesson@gmail.com> wrote: > > Add support for setting the Programmable Gain Amplifiers by adjust the > scale value.
...
> +#define MCP3911_GAIN_MASK(ch) (0x7 << 3 * ch)
GENMASK()
...
> + /* > + * For 24bit Conversion
24-bit
> + * Raw = ((Voltage)/(Vref) * 2^23 * Gain * 1.5 > + * Voltage = Raw * (Vref)/(2^23 * Gain * 1.5) > + * > + * ref = Reference voltage > + * div = (2^23 * 1.5 * gain) = 12582912 * gain > + */
...
> + /* Set gain to a known value (1) */
What is '(1)'? In parentheses we usually refer to something like a formula somewhere.
-- With Best Regards, Andy Shevchenko
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