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raspi-gpio.lsp
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raspi-gpio.lsp
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; rpi-gpio.lsp
; newlisp raspi gpio library
; Jacob Peck
; 20121113
; This code is licensed under the WTFPLv2:
;
; DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
; Version 2, December 2004
;
; Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
;
; Everyone is permitted to copy and distribute verbatim or modified
; copies of this license document, and changing it is allowed as long
; as the name is changed.
;
; DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
; TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
;
; 0. You just DO WHAT THE FUCK YOU WANT TO.
(context 'GPIO)
(set 'dir "/sys/class/gpio")
(set 'in "in")
(set 'out "out")
(set 'high "1")
(set 'low "0")
(define (enable-pin pin)
(write-file (string dir "/" "export") (string pin)))
(define (disable-pin pin)
(write-file (string dir "/" "unexport") (string pin)))
(define (pin-mode pin mode)
(write-file (string dir "/" "gpio" pin "/" "direction") (string mode)))
(define (digital-write pin value)
(write-file (string dir "/" "gpio" pin "/" "value") (string value)))
(define (digital-read pin)
(trim (read-file (string dir "/" "gpio" pin "/" "value")) "\n"))
(context MAIN)