Add support for ESP32-WROVER-DEV boards with Camera

[gitcnd]

This adds support for the ESP32-WROVER-DEV boards (alternatively named ESP32-WROVER-CAM by other manufacturers)

Board Feature			Circuitpython Status
=============                   ====================
Take photos with camera		Tested + Working
Wifi				Tested + Working
Inbuilt RED LED                 Tested + Working
ESP32-CAM-MB Button		Tested + Working
Bluetooth			Not tested
Others				There are no other features I know of

Here is my working sample script which takes a photo (and saves it to "out.jpg" in flash)

import io
import os
import board
import espcamera
import socketpool

cam = espcamera.Camera(
    data_pins=board.CAMERA_DATA,
    external_clock_pin=board.CAMERA_XCLK,
    pixel_clock_pin=board.CAMERA_PCLK,
    vsync_pin=board.CAMERA_VSYNC,
    href_pin=board.CAMERA_HREF,
    powerdown_pin=board.CAMERA_PWDN,
    reset_pin=None,
    i2c=board.I2C(),
    external_clock_frequency=20_000_000,
    pixel_format=espcamera.PixelFormat.JPEG,
    frame_size=espcamera.FrameSize.SVGA,
    # jpeg_quality=0,
    # framebuffer_count=0,
    # grab_mode=espcamera.GrabMode.WHEN_EMPTYi
    )

if True:
    frame = cam.take(1)
    fn="out.jpg"
    if isinstance(frame, memoryview):
        jpeg = frame
        print(f"Captured {len(jpeg)} bytes of jpeg data")
        with open(fn, 'wb') as f:
            f.write(jpeg)
        print(f"written to {fn}")

Here is the button test code

import board
import digitalio
import time

# Set up the button pin
button = digitalio.DigitalInOut(board.BUTTON)
button.direction = digitalio.Direction.INPUT
button.pull = digitalio.Pull.UP  

while True:
    button_state = button.value
    if button_state:
        print("Button is released")
    else:
        print("Button is pressed")
    time.sleep(0.7) 

This board uses different camera pins to my previous PR for the ESP32-CAM, however, python code written for either board works on both of these without change.

Here are my notes:-

[gitcnd]

Be aware of a common hardware fault on some of these - the power regulators are backwards ...

You may need to swap the 2 power regulators (65BX and 54FK) which got soldered in the wrong way around! See pic - cheap copy at top, original at bottom :-

issue symptoms are undetectable or intermittently failing camera.

[tannewt]

Thanks for the board def. Let's not attribute this board to espressif at all. Instead let's add a separate creator id for freenove.

[gitcnd]

OK - got a new ID sorted for Freenove, and updated the name and ID in the relevant files.

[gitcnd]

Should be ready to merge now - the PR for the new IDs is creationid/creators#69

[tannewt]

Thank you!