1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136

//! Display size.

use super::command::Command;
use display_interface::{DisplayError, WriteOnlyDataCommand};

/// Workaround trait, since `Default` is only implemented to arrays up to 32 of size
pub trait NewZeroed {
    /// Creates a new value with its memory set to zero
    fn new_zeroed() -> Self;
}

impl<const N: usize> NewZeroed for [u8; N] {
    fn new_zeroed() -> Self {
        [0u8; N]
    }
}

/// Display information.
///
/// This trait describes information related to a particular display.
/// This includes resolution, offset and framebuffer size.
pub trait DisplaySize {
    /// Width in pixels
    const WIDTH: u8;

    /// Height in pixels
    const HEIGHT: u8;

    /// Maximum width supported by the display driver
    const DRIVER_COLS: u8 = 128;

    /// Maximum height supported by the display driver
    const DRIVER_ROWS: u8 = 64;

    /// Horizontal offset in pixels
    const OFFSETX: u8 = 0;

    /// Vertical offset in pixels
    const OFFSETY: u8 = 0;

    /// Size of framebuffer. Because the display is monochrome, this is
    /// width * height / 8
    type Buffer: AsMut<[u8]> + NewZeroed;

    /// Send resolution and model-dependent configuration to the display
    ///
    /// See [`Command::ComPinConfig`](crate::Command::ComPinConfig)
    /// and [`Command::InternalIref`](crate::Command::InternalIref)
    /// for more information
    fn configure(&self, iface: &mut impl WriteOnlyDataCommand) -> Result<(), DisplayError>;
}

/// Size information for the common 128x64 variants
#[derive(Debug, Copy, Clone)]
pub struct DisplaySize128x64;
impl DisplaySize for DisplaySize128x64 {
    const WIDTH: u8 = 128;
    const HEIGHT: u8 = 64;
    type Buffer = [u8; Self::WIDTH as usize * Self::HEIGHT as usize / 8];

    fn configure(&self, iface: &mut impl WriteOnlyDataCommand) -> Result<(), DisplayError> {
        Command::ComPinConfig(true, false).send(iface)
    }
}

/// Size information for the common 128x32 variants
#[derive(Debug, Copy, Clone)]
pub struct DisplaySize128x32;
impl DisplaySize for DisplaySize128x32 {
    const WIDTH: u8 = 128;
    const HEIGHT: u8 = 32;
    type Buffer = [u8; Self::WIDTH as usize * Self::HEIGHT as usize / 8];

    fn configure(&self, iface: &mut impl WriteOnlyDataCommand) -> Result<(), DisplayError> {
        Command::ComPinConfig(false, false).send(iface)
    }
}

/// Size information for the common 96x16 variants
#[derive(Debug, Copy, Clone)]
pub struct DisplaySize96x16;
impl DisplaySize for DisplaySize96x16 {
    const WIDTH: u8 = 96;
    const HEIGHT: u8 = 16;
    type Buffer = [u8; Self::WIDTH as usize * Self::HEIGHT as usize / 8];

    fn configure(&self, iface: &mut impl WriteOnlyDataCommand) -> Result<(), DisplayError> {
        Command::ComPinConfig(false, false).send(iface)
    }
}

/// Size information for the common 72x40 variants
#[derive(Debug, Copy, Clone)]
pub struct DisplaySize72x40;
impl DisplaySize for DisplaySize72x40 {
    const WIDTH: u8 = 72;
    const HEIGHT: u8 = 40;
    const OFFSETX: u8 = 28;
    const OFFSETY: u8 = 0;
    type Buffer = [u8; Self::WIDTH as usize * Self::HEIGHT as usize / 8];

    fn configure(&self, iface: &mut impl WriteOnlyDataCommand) -> Result<(), DisplayError> {
        Command::ComPinConfig(true, false).send(iface)?;
        Command::InternalIref(true, true).send(iface)
    }
}

/// Size information for the common 64x48 variants
#[derive(Debug, Copy, Clone)]
pub struct DisplaySize64x48;
impl DisplaySize for DisplaySize64x48 {
    const WIDTH: u8 = 64;
    const HEIGHT: u8 = 48;
    const OFFSETX: u8 = 32;
    const OFFSETY: u8 = 0;
    type Buffer = [u8; Self::WIDTH as usize * Self::HEIGHT as usize / 8];

    fn configure(&self, iface: &mut impl WriteOnlyDataCommand) -> Result<(), DisplayError> {
        Command::ComPinConfig(true, false).send(iface)
    }
}

/// Size information for the common 64x32 variants
#[derive(Debug, Copy, Clone)]
pub struct DisplaySize64x32;
impl DisplaySize for DisplaySize64x32 {
    const WIDTH: u8 = 64;
    const HEIGHT: u8 = 32;
    const OFFSETX: u8 = 32;
    const OFFSETY: u8 = 0;
    type Buffer = [u8; Self::WIDTH as usize * Self::HEIGHT as usize / 8];

    fn configure(&self, iface: &mut impl WriteOnlyDataCommand) -> Result<(), DisplayError> {
        Command::ComPinConfig(true, false).send(iface)
    }
}