33 lines
736 B
Lua
33 lines
736 B
Lua
-- $NetBSD: gpio.lua,v 1.4 2017/05/10 07:51:07 mbalmer Exp $
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-- This example works only if all pins, starting from pin 0 up to the
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-- number returned by gpio.info() are, readable. It does _not_ work if
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-- only part of the pins are configured.
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local gpio = require 'gpio'
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print(gpio._VERSION .. ' - ' .. gpio._DESCRIPTION)
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print(gpio._COPYRIGHT)
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print()
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g = gpio.open('/dev/gpio0')
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local npins = g:info()
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print('gpio0 has ' .. npins .. ' pins.')
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for n = 0, npins - 1 do
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print('pin ' .. n .. ': ' .. g:read(n))
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end
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local oldval = g:write(31, gpio.PIN_HIGH)
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print('pin 31: ' .. oldval .. ' -> ' .. g:read(31))
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oldval = g:toggle(31)
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print('pin 31: ' .. oldval .. ' -> ' .. g:read(31))
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g:write(31, gpio.PIN_LOW)
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g:write(31, 5)
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