AVR: fix speech and playTone() functions

1.8.2

AVR: fix speech and playTone() functions

Fix for Create

arduino/Arduino#7789 (comment)

Firmata example updates

No functional change to library, but the Firmata sketches have been updated:

• CircuitPlaygroundFirmata - This is the Firmata code for Circuit Playground Classic only and is updated to allow access to external board pins 0, 1, 9 through Firmata.
• CircuitPlaygroundFirmata_Express_CodeOrg - This is a special version of the Firmata firmware for Circuit Playground Express only and is made to make the Express board act just like a classic board for Firmata consumers like code.org. This allows an Express board to be used with code.org's physical computing lessons with no change. Note the accelerometer axes are swapped and the board should be held in a different orientation when running accelerometer demos. In addition the pin labels on the outside of the board (silk screen) do not correspond to the pin numbers for digitalWrite and pinMode commands--instead the original Classic board pin numbers are used, i.e. pin #2 is labeled SCL / A5 on express but in the same physical position.

Microphone/Sound refactor and some bug fixes

Microphone/Sound now works on both Classic and Express the same way. All demos updated. We recommend using CircuitPlayground.mic.soundPressureLevel(10) to read 10ms of audio and return a somewhat-calibrated sound pressure level as other techniques to get audio data can be sluggish and require more work.

Update examples to use new compiler symbol

IR examples were using compiler symbol ADAFRUIT_CIRCUITPLAYGROUND_M0. That seems to have gone away. Changed examples to use ARDUINO_SAMD_CIRCUITPLAYGROUND_EXPRESS

1.6.8

fix tone on avr, rename header file to see if it helps library weirdness, allow samd captouch on digital pin #s

1.6.7

rename property file name

Update to includes tachometer examples.

Update to include fidget spinner tachometer examples that measure the speed of a fidget spinner moving in front of the light sensor.

Update with digital fidget spinner example.

Adds new digital fidget spinner example under examples/FidgetSpinner.

fix neopixels free()

1.6.4

fix for CircuitPlayground