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BusRead

display_driver::bus

Trait BusRead 

Source 
pub trait BusRead: DisplayBus {
    // Provided method
    async fn read_data(
        &mut self,
        cmd: &[u8],
        params: &[u8],
        buffer: &mut [u8],
    ) -> Result<(), DisplayError<Self::Error>> { ... }
}
Expand description

An optional trait for buses that support reading data back from the display.

While most display interactions are write-only, reading is sometimes necessary for:

  • Verifying the connection by reading the display ID.
  • Checking status registers.
  • Reading back frame memory (e.g., for screenshots), though this is less common.

Not all physical interfaces support bi-directional communication (e.g., SPI TFT is often write-only).

Provided Methods§

Source

async fn read_data( &mut self, cmd: &[u8], params: &[u8], buffer: &mut [u8], ) -> Result<(), DisplayError<Self::Error>>

Reads data from the display.

§Arguments
  • cmd - The command to initiate the read operation.
  • params - Optional parameters required before the read transaction begins.
  • buffer - The destination buffer where the read data will be stored.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§