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FeatherGpio_AnalogWrite.md

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Feather GPIO Analog Write Test

This test is intended to validate the analog output behavior of the GPIO pins.

Setup

IDE

Compile and flash using the Arduino IDE v2.x

Breadboard

  • Place 13 LEDs in a breadboard with the negative leg of each LED in the positive (red/+) rail of the breadbaord.
  • Place a 100Ohm resistor between the positive (red/+) rail and the negative (blue/-) rail.
  • Place a jumper wire between the GND header pin of the Feather and the negative (blue/-) rail of the breadboard.
  • Place jumper wires between the positive leg of an LED and one of the following pins: A0, A1, A2, A3, A4, A5, D5, D6, D9, D10, D11, D12, D13.

STLINK

  • Connect the STLINK to the STDC14 connector (a.k.a. JTAG) on the Feather. This will be used to collect logs.

Usage

On boot, you should see a "ready message" on the serial monitor (e.g. "Running Feather GPIO Analog Write Test"). Once this message has appeared, the test is running.

Each LEDs will glow (from dim to bright and back) sequentially, as the code loops through the GPIO pins and glows each one (including the Onboard LED).

Test Assertion

There is no assertion associated with this test.