Crate ht16k33

Expand description

HT16K33

ht16k33 is a driver for the Holtek HT16K33 RAM Mapping 16*8 LED Controller Driver with keyscan chip.

Currently, only the 28-pin SOP package type is supported.

Features

Uses the embedded-hal hardware abstraction.
Supports no_std for embedded devices.
Supports all 20/24/28-pin SOP package types.
Displays all 128 LEDs.
Reads keyscan.
Manages interrupts.
Manages slave devices.

Usage

NOTE: None is used for the Logger in these examples for convenience, in practice using an actual logger is preferred.

Linux-based platforms

Using the recommended linux-embedded-hal crate which implements the embedded-hal traits for Linux devices, including I2C.

extern crate linux_embedded_hal;
extern crate ht16k33;

use linux_embedded_hal::I2cdev;
use ht16k33::HT16K33;

// The I2C device address.
let address = 112u8;

// Create an I2C device.
let mut i2c = I2cdev::new("/path/to/i2c/device")?;
i2c.set_slave_address(address as u16)?;

let mut ht16k33 = HT16K33::new(i2c, address, None);

All platforms, using I2C simulation

Not all platforms have I2C support. The provided ht16k33::i2c_mock implements the embedded-hal traits for I2C.

extern crate ht16k33;
use ht16k33::i2c_mock::I2cMock;
use ht16k33::HT16K33;

// The I2C device address.
let address = 112u8;

// Create a mock I2C device.
let mut i2c = I2cMock::new(None);

let mut ht16k33 = HT16K33::new(i2c, address, None);