Electronics

DIT Adafruit FeatherM0 LED Library

The source code can be found on GitHub.

2017-06-05 02:49

This library provides:

• A couple of convenient name definitions, like:

  LED_PIN	the MCU pin the LED is connected to
  LED_ON	the signal level to write to the pin to turn the LED on
  LED_OFF	the signal level to write to the pin to switch the LED off

  so we don't have to look up the values all the time.

• The LED_configure() function, that configures the MCU pin, so it can drive the LED.

See the 01_Blink tutorial for a demo on how to use the library.

Adafruit_FeatherM0_LED.h

Adafruit_FeatherM0_LED.c

In lines 41..48 we find the function LED_configure() that configures a specific GPIO pin as a digital output pin.

• Line 43 creates a variable of the port_config type
• This variable is initialized with the default port configuration in line 45
• Line 46 changes the configuration of our pin from the default input to output, so we can drive the LED.
• Line 47 writes the modified configuration to the port pin specified.