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PCA9685-PWMExpander

PharoTings code for the PCA9685 I2C PWM expander

I am the driver for the PCA9685 16 port PWM/Servo extender. I am controlled through the I2C bus. There can be 62 of me on the bus.

You can change my frequency (30 - 3000 Hz) and on/off ratio. I start in sleep mode.

The internal clock is nominally 25 MHz. If you need more precise timing, you can alter this for use in the internal calculations (>>adjustedClockFrequency:).

Pin numbers run from 0 to 15, because that is what is used in the datasheet and also on the print.

Main methods:

wakeUp - start from sleep.

frequency: - frequency. Typically 50 Hz for driving servo motors, or up to 3000 Hz for LEDs.

pwmForPin: microSeconds: - on-time, used for servos in range 500 - 2500.

pwmForPin: percentage: - percentage on-time .

pinOn: and pinOff: - to turn a pin fully ON or OFF.

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