adafruit_7segment

Trait SevenSegment

Source 
pub trait SevenSegment<E> {
    // Required methods
    fn update_buffer_with_digit(&mut self, index: Index, value: u8);
    fn update_buffer_with_dot(&mut self, index: Index, dot_on: bool);
    fn update_buffer_with_colon(&mut self, colon_on: bool);
    fn update_buffer_with_char(
        &mut self,
        index: Index,
        value: AsciiChar,
    ) -> Result<(), Error>;
    fn update_buffer_with_float(
        &mut self,
        index: Index,
        value: f32,
        fractional_digits: u8,
        base: u8,
    ) -> Result<(), Error>;
}
Expand description

Trait enabling using the Adafruit 7-segment LED numeric Backpack.

Required Methods§

Source

fn update_buffer_with_digit(&mut self, index: Index, value: u8)

Update the buffer with a digit value (0 to F) at the specified index.

Source

fn update_buffer_with_dot(&mut self, index: Index, dot_on: bool)

Update the buffer to turn the . on or off at the specified index.

Source

fn update_buffer_with_colon(&mut self, colon_on: bool)

Update the buffer to turn the : on or off.

Source

fn update_buffer_with_char( &mut self, index: Index, value: AsciiChar, ) -> Result<(), Error>

Update the buffer with an ascii character at the specified index.

Source

fn update_buffer_with_float( &mut self, index: Index, value: f32, fractional_digits: u8, base: u8, ) -> Result<(), Error>

Update the buffer with a formatted float not starting before the specified index.

Implementations on Foreign Types§

Source§

impl<I2C, E> SevenSegment<E> for HT16K33<I2C>
where I2C: Write<Error = E> + WriteRead<Error = E>,

Source§

fn update_buffer_with_digit(&mut self, index: Index, value: u8)

Update the buffer with a hex digit value (0x00 to 0x0F) at the specified index

§Arguments
  • index - Digit index.
  • value - Value 0x00 to 0x0F.
§Examples
use ht16k33::i2c_mock::I2cMock;
use ht16k33::HT16K33;
use adafruit_7segment::{SevenSegment, Index};

// Create an I2C device.
let mut i2c = I2cMock::new();

// The I2C device address.
const DISP_I2C_ADDR: u8 = 112;

let mut ht16k33 = HT16K33::new(i2c, DISP_I2C_ADDR);

// Set first digit to 9.
ht16k33.update_buffer_with_digit(Index::One, 9);
Source§

fn update_buffer_with_dot(&mut self, index: Index, dot_on: bool)

Update the buffer to turn the . on or off at the specified index

§Arguments
  • index - Digit index.
  • dot_on - Enable or disable the dot.
§Examples
use ht16k33::i2c_mock::I2cMock;
use ht16k33::HT16K33;
use adafruit_7segment::{SevenSegment, Index};

// Create an I2C device.
let mut i2c = I2cMock::new();

// The I2C device address.
const DISP_I2C_ADDR: u8 = 112;

let mut ht16k33 = HT16K33::new(i2c, DISP_I2C_ADDR);

// Enable dot for first digit.
ht16k33.update_buffer_with_dot(Index::One, true);
Source§

fn update_buffer_with_colon(&mut self, colon_on: bool)

Update the buffer to turn the : on or off.

§Arguments
  • colon_on - Enable or disable the colon.
§Examples
use ht16k33::i2c_mock::I2cMock;
use ht16k33::HT16K33;
use adafruit_7segment::{SevenSegment, Index};

// Create an I2C device.
let mut i2c = I2cMock::new();

// The I2C device address.
const DISP_I2C_ADDR: u8 = 112;

let mut ht16k33 = HT16K33::new(i2c, DISP_I2C_ADDR);

// Enable the colon.
ht16k33.update_buffer_with_colon(true);
Source§

fn update_buffer_with_char( &mut self, index: Index, value: AsciiChar, ) -> Result<(), Error>

Update the buffer with an ascii character at the specified index.

§Arguments
  • index - Digit index.
  • value - Ascii character.
§Examples
use ht16k33::i2c_mock::I2cMock;
use ht16k33::HT16K33;
use adafruit_7segment::{SevenSegment, Index, AsciiChar};

// Create an I2C device.
let mut i2c = I2cMock::new();

// The I2C device address.
const DISP_I2C_ADDR: u8 = 112;

let mut ht16k33 = HT16K33::new(i2c, DISP_I2C_ADDR);

// Set first digit to 'c'.
ht16k33.update_buffer_with_char(Index::One, AsciiChar::new('c')).expect("Failed to encode char to buffer!");
Source§

fn update_buffer_with_float( &mut self, index: Index, value: f32, fractional_digits: u8, base: u8, ) -> Result<(), Error>

Update the buffer with a formatted float not starting before the specified index The logic for this is copied mostly from from the adafruit library. Only difference is this allows the start index to be > 0

§Arguments
  • index - Digit index.
  • value - float value.
  • fractional_digits - Number of fractional digits.
  • base - Base to use.
§Examples
use ht16k33::i2c_mock::I2cMock;
use ht16k33::HT16K33;
use adafruit_7segment::{SevenSegment, Index};

// Create an I2C device.
let mut i2c = I2cMock::new();

// The I2C device address.
const DISP_I2C_ADDR: u8 = 112;

let mut ht16k33 = HT16K33::new(i2c, DISP_I2C_ADDR);

// Write 9.9 from pos 2
ht16k33.update_buffer_with_float(Index::Two, 9.9, 1, 10);

Implementors§