Documentation update

- mention analogWriteRange and analogWriteFreq
- update change log
- add pwm output symbol for pin 16 to svg

Author: igrr

README.md

@@ -33,8 +33,7 @@ $ cd Arduino/build
 $ ant dist
 ```
 
-### Documentation ###
-Latest development version:
+Documentation for latest development version:
 
 - [Reference](hardware/esp8266com/esp8266/doc/reference.md)
 - [Supported boards](hardware/esp8266com/esp8266/doc/boards.md)

hardware/esp8266com/esp8266/doc/changes.md

@@ -2,23 +2,49 @@
 title: Change log
 ---
 
-
+*Future release*
 
 ### Core
 
-- Updated I2C library to better handle repeated start for certain devices.
+- I2C library updated to better handle repeated start for certain devices,
+  improved waveforms, higher frequencies for 160MHz core clock, fix case where
+  using different pins would not work with libs calling begin internally.
+- Add Adafruit HUZZAH board
+- Add SparkFun Thing board
+- Add SweetPea ESP-210 board
+- Add eboot bootloader
+- Timer0 support
+- Add PWM range and frequency control
+- Add ESP.eraseConfig method
+- Fix pin change interrupt handling (#322)
+- Add SLC and I2S register definitions
+- Fix math functions calling themselves recursively (#233, #354)
+- Print stack on exception and soft WDT reset
+- Add Updater class
+- Remove implementations of WDT-related functions
+- Provide selection between A0 and VCC (#443, #338)
 
 ### Libraries
 
 - ESP8266WebServer: add gzip streaming, fix sendContent behaviour,
   add setContentSize method.
 - ESP8266WiFi: add BSSID, channel, isHidden methods, fix AP/STA mode
   selection (#28).
+- Better handling of WiFi disconnect (#231)
+- Add API to set the beginning of local ports range for WiFiClient.
+- Add RSSI function
+- Add function to get the MAC / BSSID as String
+- Servo library support
+- Add ESP8266WiFiMesh library
+- Add ESP8266SSDP library
 
 ### Tools
 
-- SDK updated to 1.1.0 (#306)
+- Update SDK to v1.2.0_15_07_03
+- Better sketch size reporting (#314)
+- Update esptool to 0.4.5
 
+---
 
 ## 1.6.4-673-g8cd3697
 May 22, 2015

hardware/esp8266com/esp8266/doc/esp12.svg

@@ -17,6 +17,10 @@ Digital pins 6—11 are not shown on this diagram because they are used to conne
 
 Note that some boards and modules (ESP-12ED, NodeMCU 1.0) also break out pins 9 and 11. These may be used as IO if flash chip works in DIO mode (as opposed to QIO, which is the default one).
 
+Pin interrupts are supported through `attachInterrupt`, `detachInterrupt` functions.
+Interrupts may be attached to any GPIO pin, except GPIO16. Standard Arduino interrupt
+types are supported: `CHANGE`, `RISING`, `FALLING`.
+
 ## Analog input
 
 ESP8266 has a single ADC channel available to users. It may be used either to read voltage at ADC pin, or to read module supply voltage (VCC).
@@ -34,12 +38,9 @@ This line has to appear outside of any functions, for instance right after the `
 ## Analog output
 
 `analogWrite(pin, value)` enables software PWM on the given pin. PWM may be used on pins 0 to 16.
-Call `analogWrite(pin, 0)` to disable PWM on the pin. `value` may be in range from 0 to `PWMRANGE`, which is currently equal to 1023.
-
-Pin interrupts are supported through `attachInterrupt`, `detachInterrupt` functions.
-Interrupts may be attached to any GPIO pin, except GPIO16. Standard Arduino interrupt
-types are supported: `CHANGE`, `RISING`, `FALLING`.
+Call `analogWrite(pin, 0)` to disable PWM on the pin. `value` may be in range from 0 to `PWMRANGE`, which is equal to 1023 by default. PWM range may be changed by calling `analogWriteRange(new_range)`.
 
+PWM frequency is 1kHz by default. Call `analogWriteFreq(new_frequency)` to change the frequency.
 
 ## Timing and delays
 `millis()` and `micros()` return the number of milliseconds and microseconds elapsed after reset, respectively.