Commit 3c0da6a3 authored by Paul Sokolovsky's avatar Paul Sokolovsky
Browse files

examples/hwapi: button_led: Add GPIO pin read example.

Requires BUTTON defined in hwconfig, so far tested on DragonBoard 410c.
parent 1375c527
import utime
from hwconfig import LED, BUTTON
# Light LED when (and while) a BUTTON is pressed
while 1:
# Don't burn CPU
from machine import Pin
# 96Boards/Qualcomm DragonBoard 410c
# By default, on-board LEDs are controlled by kernel LED driver.
# To make corresponding pins be available as normal GPIO,
# corresponding driver needs to be unbound first (as root):
# echo -n "soc:leds" >/sys/class/leds/apq8016-sbc:green:user1/device/driver/unbind
# Note that application also either should be run as root, or
# /sys/class/gpio ownership needs to be changed.
# Likewise, onboard buttons are controlled by gpio_keys driver.
# To release corresponding GPIOs:
# echo -n "gpio_keys" >/sys/class/input/input1/device/driver/unbind
# User LED 1 on gpio21
LED = Pin(21, Pin.OUT)
# Button S3 on gpio107
BUTTON = Pin(107, Pin.IN)
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