esp_hal::lcd_cam

Module cam

Source
Available on crate feature unstable only.
Expand description

§Camera - Master or Slave Mode

§Overview

The camera module is designed to receive parallel video data signals, and its bus supports DVP 8-/16-bit modes in master or slave mode.

§Configuration

In master mode, the peripheral provides the master clock to drive the camera, in slave mode it does not. This is configured with the with_master_clock method on the camera driver. The driver (due to the peripheral) mandates DMA (Direct Memory Access) for efficient data transfer.

§Examples

§Master Mode

Following code shows how to receive some bytes from an 8 bit DVP stream in master mode.



let mclk_pin = peripherals.GPIO15;
let vsync_pin = peripherals.GPIO6;
let href_pin = peripherals.GPIO7;
let pclk_pin = peripherals.GPIO13;
let data_pins = RxEightBits::new(
    peripherals.GPIO11,
    peripherals.GPIO9,
    peripherals.GPIO8,
    peripherals.GPIO10,
    peripherals.GPIO12,
    peripherals.GPIO18,
    peripherals.GPIO17,
    peripherals.GPIO16,
);

let config = Config::default().with_frequency(Rate::from_mhz(20));

let lcd_cam = LcdCam::new(peripherals.LCD_CAM);
let mut camera = Camera::new(
    lcd_cam.cam,
    peripherals.DMA_CH0,
    data_pins,
    config,
)?
.with_master_clock(mclk_pin) // Remove this for slave mode
.with_pixel_clock(pclk_pin)
.with_ctrl_pins(vsync_pin, href_pin);

let transfer = camera.receive(dma_buf).map_err(|e| e.0)?;

Structs§

  • Cam
    Represents the camera interface.
  • Camera
    Represents the camera interface with DMA support.
  • CameraTransfer
    Represents an ongoing (or potentially stopped) transfer from the Camera to a DMA buffer.
  • Config
    Configuration settings for the Camera interface.
  • RxEightBits
    Represents an 8-bit wide camera data bus. Is used to configure the camera interface to receive 8-bit data.
  • RxSixteenBits
    Represents a 16-bit wide camera data bus. Is used to configure the camera interface to receive 16-bit data.

Enums§