Add support for ssd1315 displays

[Rekkice]

This PR adds supporf for ssd1315 displays. ssd1315 is mostly compatible with ssd1306 drivers, but it has some small differences, such as requiring a special initialization sequence and needing an explicit column address reset when updating.

I also increased the timeout window from 10 to 100, to fix this error i was getting:
E (1225) SSD1306: I2C write failed for display update: 0x107 (a timeout)

The initialization sequence is based on the one used in u8g2.

Tested on an ESP32.

[petermm]

Thank you for the PR.

Lets improve PR title to something like Add sds1315 support

Lets improve PR description to something like:

sds1315 is similar to sds1306, but requires special initialization sequence

see https://github.com/olikraus/u8g2/blob/764ee93150d23779ea9d8a7e8cae73efb60749d4/csrc/u8x8_d_ssd1315_128x64_noname.c#L42 
and/or other link eg. add links/references

Finally it helps if you mentions it's tested on hardware and what specific hardware..

And also squash commits, unless it makes sense to have separate ones.

Buenos tardes y gracias!

[bettio]

I just left 2 minor comments, also I agree with @petermm
Everything else looks good, thanks for the contribution. I'm looking forward merging this PR.

[Rekkice]

Thanks for the feedback! i accidentally opened the PR earlier than intended, i'm sorry about the lack of details.

I tested the changes with an ESP32 and using the following Elixir program:

defmodule SerialTest do
  @sda_pin 21
  @scl_pin 22

  def start do
    i2c_opts = [
      sda: @sda_pin,
      scl: @scl_pin,
      clock_speed_hz: 100_000,
      peripheral: "i2c0"
    ]

    i2c_host = :i2c.open(i2c_opts)

    display_opts = [
      width: 128,
      height: 64,
      compatible: "solomon-systech,ssd1315",
      i2c_host: i2c_host,
      invert: false
    ]

    display = :erlang.open_port({:spawn, "display"}, display_opts)

    {:ok, _pid} =
      HelloScene.start_link([],
        display_server: {:port, display}
      )

    Process.sleep(:infinity)
  end
end

defmodule HelloScene do
  def start_link(args, opts) do
    :avm_scene.start_link(__MODULE__, args, opts)
  end

  def init(_args) do
    :erlang.send_after(100, self(), :update_display)
    {:ok, %{width: 320, height: 240}}
  end

  def handle_info(:update_display, %{width: width, height: height} = state) do
    items = [
      {:text, 10, 20, :default16px, 0x000000, 0xFFFFFF, "Hello World!"},
      {:rect, 0, 0, width, height, 0xFFFFFF}
    ]

    {:noreply, state, [{:push, items}]}
  end
end

I only have a ssd1315 screen to test with, so i'd really appreciate it if someone could check if any of the other screens are affected by the do_update change

[petermm]

I2C_CHUNK_SIZE is not used anywhere, so let's remove line.

[clsource]

solved

[petermm]

Tested ssd1306 on simulator, as working.. so LGTM besides that stray I2C_CHUNK_SIZE

[petermm]

this 0xAF is redundant as it's being sent later CMD_DISPLAY_ON for all displays..

[clsource]

solved