From 62552a6f3f93223682f9df2df2614411f7e3d54c Mon Sep 17 00:00:00 2001 From: Perry Hung Date: Sun, 25 Apr 2010 18:08:56 -0400 Subject: Refactoring: The 'core' directory has now been renamed to 'wirish.' Wirish is our version of the Arduino Wiring language. --- wirish/wirish_shift.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 wirish/wirish_shift.c (limited to 'wirish/wirish_shift.c') diff --git a/wirish/wirish_shift.c b/wirish/wirish_shift.c new file mode 100644 index 0000000..884b560 --- /dev/null +++ b/wirish/wirish_shift.c @@ -0,0 +1,40 @@ +/* + wiring_shift.c - shiftOut() function + Part of Arduino - http://www.arduino.cc/ + + Copyright (c) 2005-2006 David A. Mellis + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General + Public License along with this library; if not, write to the + Free Software Foundation, Inc., 59 Temple Place, Suite 330, + Boston, MA 02111-1307 USA + + $Id: wiring.c 248 2007-02-03 15:36:30Z mellis $ +*/ + +#include "wirish.h" + +void shiftOut(uint8 dataPin, uint8 clockPin, uint8 bitOrder, uint8 val) +{ + int i; + + for (i = 0; i < 8; i++) { + if (bitOrder == LSBFIRST) + digitalWrite(dataPin, !!(val & (1 << i))); + else + digitalWrite(dataPin, !!(val & (1 << (7 - i)))); + + digitalWrite(clockPin, HIGH); + digitalWrite(clockPin, LOW); + } +} -- cgit v1.2.3