34 lines
1.1 KiB
C
34 lines
1.1 KiB
C
/*
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* Copyright (c) 2005-2006 David A. Mellis
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 2.1 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "wiring_private.h"
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void shiftOut(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder, byte val)
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{
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int i;
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for (i = 0; i < 8; i++) {
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if (bitOrder == LSBFIRST)
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digitalWrite(dataPin, !!(val & (1 << i)));
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else
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digitalWrite(dataPin, !!(val & (1 << (7 - i))));
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digitalWrite(clockPin, HIGH);
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digitalWrite(clockPin, LOW);
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}
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}
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