ov5640

group ov5640

Driver for the I²C OV5640 camera sensor.

https://cdn.sparkfun.com/datasheets/Sensors/LightImaging/ The parallel data path is connected to FPGA. The MCU only has access to the I²C configuration interface.

  • 5MP max resolutiono

  • Recording happens at 15 FPS, and the FPGA triple every frame to match the 50 FPS of the ECX335AF display.

  • When using the 4x digital zoom, the camera outputs 640x400 video.

Defines

OV5640_CHIPIDH

OV5640 Chip ID Register address, high byte.

OV5640_CHIPIDL

OV5640 Chip ID Register address, low byte.

OV5640_ID

OV5640 Chip ID, expected value.

OV5640_FPS

frames per second, as implemented in camera configuration

TRANSFER_CMPLT
TRANSFER_ERROR
I2C_SLAVE_ADDR

Functions

void ov5640_prepare(void)

Prepare the pins before the power comes in.

void ov5640_init(void)

Init the camera.

Trigger initialisation of the chip, controlling its reset and power pins.

void ov5640_deinit(void)

Revert the configuration of the camera module.

void ov5640_pwr_on(void)

Power on the camera.

Precondition: ov5640_init() called earlier in main.c

void ov5640_pwr_sleep(void)

Put camera into low-power mode, preserving configuration.

void ov5640_pwr_wake(void)

Wake camera up from low-power mode, prior configuration still valid.

void ov5640_mode_1x(void)

Change ov5640 config for 1x zoom.

void ov5640_mode_2x(void)

NWA: change ov5640 config for 2x zoom, also used for 4x.

void ov5640_reduce_size(uint16_t Hpixels, uint16_t Vpixels)

Reduce camera output size.

Todo:

This function has not been tested, but uses code from >

Implement error checking on inputs, return a success/failure code>

Parameters

  • Hpixels – desired horizontal output resolution (should be <= 640)

  • Vpixels – desired vertical output resolution (should be <= 400)

Pre

ov5640_rgb565_mode_1x() or _2x() should have already been called

void ov5640_light_mode(uint8_t mode)

Configures AWB gain control.

Parameters

mode – Refer AWB Light mode config

void ov5640_color_saturation(uint8_t sat)

Configures color saturation.

Parameters

sat – Refer Color saturation config

void ov5640_brightness(uint8_t bright)

Configures brightness.

Parameters

bright – Range 0 - 8

void ov5640_contrast(uint8_t contrast)

Configures contrast.

Parameters

contrast – Range 0 - 6.

void ov5640_sharpness(uint8_t sharp)

Configures sharpness.

Parameters

sharp – Range 0 to 33, 0: off 33: auto.

void ov5640_special_effects(uint8_t eft)

Configures effects.

Parameters

eft – refer Effect configs

void ov5640_flash_ctrl(bool on)

Controls flash.

Parameters

sw – 0: off 1: on

void ov5640_mirror(bool on)

Mirrors camera output (horizontal flip).

Parameters

on – 1 to turn on, 0 to turn off

void ov5640_flip(bool on)

Flips camera output (vertical flip).

Parameters

on – 1 to turn on, 0 to turn off

void ov5640_outsize_set(uint16_t offx, uint16_t offy, uint16_t width, uint16_t height)

Configures window size.

Parameters

  • offx – Offset X

  • offy – Offset Y

  • width – Prescale width

  • height – Presclae height

void ov5640_focus_init(void)

Focus init transfer camera module firmware.