2019-10-07 15:32:17 +13:00
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# PCA9685
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2019-10-08 14:18:05 +13:00
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Driver for PCA9685 based 16 channel, 12 bit PWM driver connected over I2C.
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## Usage
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Add your device to your config like so:
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```elixir
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config :pca9685,
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2019-10-08 14:29:03 +13:00
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devices: [%{bus: "i2c-1", address: 0x40}]
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2019-10-08 14:18:05 +13:00
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```
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The properties `bus` and `address` are mandatory. You can optionally provide
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`pwm_freq` which is the output frequency you'd like to set (in Hz) and
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`oe_pin` which is the GPIO pin that you want to use for the output-enable
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function. Remember that the OE pin is expecting to be driven high to +5V, so
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won't work on a Raspberry Pi without a level shifter of some kind.
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Your devices will be reset and you will be able to drive the outputs with your
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specified output frequency and duty cycle.
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2019-10-07 15:32:17 +13:00
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## Installation
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If [available in Hex](https://hex.pm/docs/publish), the package can be installed
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by adding `pca9685` to your list of dependencies in `mix.exs`:
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```elixir
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def deps do
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[
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{:pca9685, "~> 0.1.0"}
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]
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end
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```
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Documentation can be generated with [ExDoc](https://github.com/elixir-lang/ex_doc)
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and published on [HexDocs](https://hexdocs.pm). Once published, the docs can
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be found at [https://hexdocs.pm/pca9685](https://hexdocs.pm/pca9685).
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