Fix #36 - restrict output range of pitch() roll() and yaw() (#37)

* fix #16 - limit pitch roll yaw output range to 0 .. 359.99
* add changlog.md
* add RP2040 pico to build-ci

.arduino-ci.yml

@@ -1,3 +1,18 @@
+platforms:
+  rpipico:
+    board: rp2040:rp2040:rpipico
+    package: rp2040:rp2040
+    gcc:
+      features:
+      defines:
+        - ARDUINO_ARCH_RP2040
+      warnings:
+      flags:
+
+packages:
+  rp2040:rp2040:
+    url: https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json
+
 compile:
   # Choosing to run compilation tests on 2 different Arduino platforms
   platforms:
@@ -8,4 +23,5 @@ compile:
     - m4
     - esp32
     # - esp8266
-    # - mega2560
+    # - mega2560
+    - rpipico

CHANGELOG.md

@@ -0,0 +1,98 @@
+# Change Log GY521
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+## [0.3.8] - 2022-10-07
+
+- added CHANGELOG.md
+- fix #36 - limit values of pitch() roll() yaw() to 0..360 range.
+- rename three constants, move to .h.
+  - add constants check to unit test.
+  - updated keywords
+- updated build to include RP2040 pico
+- updated documentation a bit.
+
+## [0.3.7] - 2022-07-26
+
+- add partial reads readAccel(), readGyro() and readTemperature()
+- rename + add GY521_LIB_VERSION to examples.
+
+## [0.3.6] - 2021-12-18
+
+- update library.json, license, minor edits
+
+## [0.3.5] - 2021-10-20
+
+- update build-CI, badges 
+- fix #28 add wakeup to begin().
+
+## [0.3.4] - 2021-07-12
+
+- fix #24 improve precision
+
+## [0.3.3] - 2021-07-05
+
+- fix #22 improve maths
+
+## [0.3.2] - 2021-07-05
+
+- fix #20 support multiWire
+
+## [0.3.1] - 2021-06-13
+
+- added more unit test 
+- some initialization
+
+## [0.3.0] - 2021-04-07
+
+- fix #18 acceleration error correction (kudo's to Merkxic)
+
+## [0.2.3] - 2021-01-26
+
+- align version numbers (oops)
+
+## [0.2.2] - 2021-01-24
+
+- add interface part to readme.md
+- add GY521_registers.h
+
+## [0.2.1] - 2020-12-24
+
+- add Arduino-CI build
+- add unit tests
+
+## [0.2.0] - 2020-11-03
+
+- improve error handling
+
+## [0.1.5] - 2020-09-29
+
+- fix #6 fix maths for Teensy
+
+## [0.1.4] - 2020-09-29
+
+- fix #5 missing ;
+
+## [0.1.3] - 2020-08-07
+
+- fix ESP support
+- add pitch roll yaw demo
+
+## [0.1.2] - 2020-08-06
+
+- fix setAccelSensitivity
+- add getters
+
+## [0.1.1] - 2020-07-09
+
+- refactor
+- initial release
+
+## [0.1.0] - 2017-11-20
+
+- initial version
+
+