Struct pca9685_lib::PCA9685

pub struct PCA9685 { /* fields omitted */ }

A representation of a PCA9685 Chip

Methods

impl PCA9685

pub fn new(address: u8, bus: I2c) -> Result<PCA9685, Error>

Creates a new PCA9865

pub async fn start<'_>(&'_ mut self) -> Result<(), Error>

Start the PCA9865. The chip needs a little time to start.

pub fn sleep(&mut self) -> Result<(), Error>

Put the chip into sleep

pub async fn set_prescale_fr<'_>(
    &'_ mut self,
    frequency: u16,
    restart: bool
) -> Result<(), Error>

Set the prescale value from a given frequency.

Warnings

• In order to change the prescale, the chip must be put into sleep. Make sure that anything important be safetied before use.

• This function tries to be as close as possible to the given frequency, but it is not 100% accurate.

pub fn read_prescale(&mut self) -> Result<u8, Error>

Reads the prescale directly from the chip.

pub fn set_channel(
    &mut self,
    channel: u8,
    period_on: (u8, u8),
    period_off: (u8, u8)
) -> Result<(), Error>

Set the pulse-widths for a channel. Channels range from 0 - 15. Since the device uses 12-bit accuracy, the tuples are arranged as (most_significant, least_significant)

Panics

The channel must be less than 16.

pub async fn set_external_clock<'_>(
    &'_ mut self,
    clock_speed: u32
) -> Result<(), Error>

Set to use External Clock

Warnings

• In order to use the EXTCLK pin, the chip must be put to sleep.
• In order to reset this mode, you have to run a power cycle (or software reset).
• Max frequency is 50 Mhz
• Untested

pub fn set_output_mode(&mut self, open_drain: bool) -> Result<(), Error>

Set the output mode of the chip.

Options:

• Open-Drain
• Totem pole <-- chip default

Warnings

• LEDS with built in zener diodes should only be driven in open drain mode.
• Untested

pub fn get_prescale(&mut self) -> Result<u8, Error>

Gets the prescale value