// Copyright 2016 The Periph Authors. All rights reserved.
// Use of this source code is governed under the Apache License, Version 2.0
// that can be found in the LICENSE file.

// Package ssd1306 controls a 128x64 monochrome OLED display via a SSD1306
// controller.
//
// The driver does differential updates: it only sends modified pixels for the
// smallest rectangle, to economize bus bandwidth. This is especially important
// when using I²C as the bus default speed (often 100kHz) is slow enough to
// saturate the bus at less than 10 frames per second.
//
// The SSD1306 is a write-only device. It can be driven on either I²C or SPI
// with 4 wires. Changing between protocol is likely done through resistor
// soldering, for boards that support both.
//
// Some boards expose a RES / Reset pin. If present, it must be normally be
// High. When set to Low (Ground), it enables the reset circuitry. It can be
// used externally to this driver, if used, the driver must be reinstantiated.
//
// More details
//
// See https://periph.io/device/ssd1306/ for more details about the device.
//
// Datasheets
//
// Product page:
// http://www.solomon-systech.com/en/product/display-ic/oled-driver-controller/ssd1306/
//
// https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf
//
// "DM-OLED096-624": https://drive.google.com/file/d/0B5lkVYnewKTGaEVENlYwbDkxSGM/view
//
// "ssd1306": https://drive.google.com/file/d/0B5lkVYnewKTGYzhyWWp0clBMR1E/view
package ssd1306