From d6869d1ec4bd24cd2c3eafa534f0849b25ec5607 Mon Sep 17 00:00:00 2001
From: Clyne Sullivan <tullivan99@gmail.com>
Date: Thu, 28 Feb 2019 17:04:22 -0500
Subject: added basic code

---
 arduino/cores/nRF5/wiring_shift.c | 74 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100755 arduino/cores/nRF5/wiring_shift.c

(limited to 'arduino/cores/nRF5/wiring_shift.c')

diff --git a/arduino/cores/nRF5/wiring_shift.c b/arduino/cores/nRF5/wiring_shift.c
new file mode 100755
index 0000000..3260d2b
--- /dev/null
+++ b/arduino/cores/nRF5/wiring_shift.c
@@ -0,0 +1,74 @@
+/*
+  Copyright (c) 2014 Arduino.  All right reserved.
+
+  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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#include <stdint.h>
+#include "wiring_shift.h"
+#include "wiring_digital.h"
+#include "wiring_private.h"
+
+#ifdef __cplusplus
+extern "C"{
+#endif
+
+uint32_t shiftIn( uint32_t ulDataPin, uint32_t ulClockPin, uint32_t ulBitOrder )
+{
+  uint8_t value = 0 ;
+  uint8_t i ;
+
+  for ( i=0 ; i < 8 ; ++i )
+  {
+    digitalWrite( ulClockPin, HIGH ) ;
+
+    if ( ulBitOrder == LSBFIRST )
+    {
+      value |= digitalRead( ulDataPin ) << i ;
+    }
+    else
+    {
+      value |= digitalRead( ulDataPin ) << (7 - i) ;
+    }
+
+    digitalWrite( ulClockPin, LOW ) ;
+  }
+
+  return value ;
+}
+
+void shiftOut( uint32_t ulDataPin, uint32_t ulClockPin, uint32_t ulBitOrder, uint32_t ulVal )
+{
+  uint8_t i ;
+
+  for ( i=0 ; i < 8 ; i++ )
+  {
+    if ( ulBitOrder == LSBFIRST )
+    {
+      digitalWrite( ulDataPin, !!(ulVal & (1 << i)) ) ;
+    }
+    else
+    {
+      digitalWrite( ulDataPin, !!(ulVal & (1 << (7 - i))) ) ;
+    }
+
+    digitalWrite( ulClockPin, HIGH ) ;
+    digitalWrite( ulClockPin, LOW ) ;
+  }
+}
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
-- 
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