Add doc

ssd1306/doc.go

@@ -2,17 +2,18 @@
 // 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.
+// Package ssd1306 controls a monochrome OLED display via a SSD1306, SH1106,
+// or SH1107 controller. The driver automatically detects the variant and
+// adjusts accordingly.
 //
 // 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.
+// The device 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
@@ -25,11 +26,22 @@
 // # Datasheets
 //
 // Product page:
+//
+// SSD1306
+//
 // 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
+// SH1106
+//
+// https://cdn.velleman.eu/downloads/29/infosheets/sh1106_datasheet.pdf
+//
+// SH1107
+//
+// https://www.adafruit.com/product/5297
+//
+// https://www.displayfuture.com/Display/datasheet/controller/SH1107.pdf
 package ssd1306