embedded_display_controller/
dsi.rs

1pub trait DsiHostCtrlIo {
2    type Error;
3
4    fn write(&mut self, command: DsiWriteCommand) -> Result<(), Self::Error>;
5    fn read(&mut self, command: DsiReadCommand, buf: &mut [u8]) -> Result<(), Self::Error>;
6}
7
8#[repr(u8)]
9#[derive(Debug)]
10pub enum DsiReadCommand {
11    DcsShort { arg: u8 } = 0x06,
12
13    // xx x101 0-7 arguments
14    GenericShortP0 = 0x04,
15    GenericShortP1 { arg0: u8 } = 0x14,
16    GenericShortP2 { arg0: u8, arg1: u8 } = 0x24,
17}
18
19impl DsiReadCommand {
20    pub fn discriminant(&self) -> u8 {
21        // SAFETY: Because `Self` is marked `repr(u8)`, its layout is a `repr(C)` `union`
22        // between `repr(C)` structs, each of which has the `u8` discriminant as its first
23        // field, so we can read the discriminant without offsetting the pointer.
24        unsafe { *<*const _>::from(self).cast::<u8>() }
25    }
26}
27
28#[repr(u8)]
29#[derive(Debug)]
30pub enum DsiWriteCommand<'i> {
31    DcsShortP0 { arg: u8 } = 0x5,
32    DcsShortP1 { arg: u8, data: u8 } = 0x15,
33    DcsLongWrite { arg: u8, data: &'i [u8] } = 0x39,
34
35    GenericShortP0 = 0x03,
36    GenericShortP1 = 0x13,
37    GenericShortP2 = 0x23,
38    GenericLongWrite { arg: u8, data: &'i [u8] } = 0x29,
39
40    SetMaximumReturnPacketSize(u16) = 0x37,
41}
42
43impl<'i> DsiWriteCommand<'i> {
44    pub fn discriminant(&self) -> u8 {
45        // SAFETY: Because `Self` is marked `repr(u8)`, its layout is a `repr(C)` `union`
46        // between `repr(C)` structs, each of which has the `u8` discriminant as its first
47        // field, so we can read the discriminant without offsetting the pointer.
48        unsafe { *<*const _>::from(self).cast::<u8>() }
49    }
50}
embedded_display_controller/dsi.rs

embedded_display_controller/
dsi.rs
