Enum Drive 

#[repr(u8)]
pub enum Drive {
    Lowest = 0,
    VeryLow = 1,
    Low = 2,
    Medium = 3,
    MediumHigh = 4,
    High = 5,
    VeryHigh = 6,
    Highest = 7,
    PermanentHighDrive = 9,
}

Defines the pulse duration in terms of ck_ps pulses.

A short pulse leads to lower power consumption, but displays with high internal resistance may need a longer pulse to achieve satisfactory contrast. Note that the pulse is never longer than one half prescaled LCD clock period.

Displays with high internal resistance may need a longer drive time to achieve satisfactory contrast. PermanentHighDrive is useful in this case if some additional power consumption can be tolerated.

Basically, for power usage, you want this as low as possible while still being able to use the LCD with a good enough contrast.

Variants

Lowest = 0

Zero clock pulse on duration

VeryLow = 1

One clock pulse on duration

Low = 2

Two clock pulse on duration

Medium = 3

Three clock pulse on duration

MediumHigh = 4

Four clock pulse on duration

High = 5

Five clock pulse on duration

VeryHigh = 6

Six clock pulse on duration

Highest = 7

Seven clock pulse on duration

PermanentHighDrive = 9

Enables the highdrive bit of the hardware

Trait Implementations

impl Clone for Drive

fn clone(&self) -> Drive

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Drive

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Copy for Drive