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authorDavid A. Mellis <d.mellis@arduino.cc>2009-11-21 23:23:43 +0000
committerDavid A. Mellis <d.mellis@arduino.cc>2009-11-21 23:23:43 +0000
commit35f5f6e99f15e0cc674c814937c82ef5fbbf86c3 (patch)
treebc2c0bbb790831ab26bfa8221cf6f3554363b89b /cores/arduino/wiring_shift.c
parent80d8477877dc004f293d0ab1717b8783421d84a0 (diff)
Improving third-party hardware support:
- moving back to multple cores per platform - using target instead of platform - moving per-board and per-programmer preferences out of Preferences.java and into a new Target class - adding a new "target" preference - support for platform:value values in board preferences for bootloader path and core - XXX: need to support platform:value syntax for board upload.using preferences.
Diffstat (limited to 'cores/arduino/wiring_shift.c')
-rwxr-xr-xcores/arduino/wiring_shift.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/cores/arduino/wiring_shift.c b/cores/arduino/wiring_shift.c
new file mode 100755
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--- /dev/null
+++ b/cores/arduino/wiring_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 "wiring_private.h"
+
+void shiftOut(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder, byte 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);
+ }
+}