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/**
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* Marlin 3D Printer Firmware
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* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
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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 General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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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 General Public License for more details.
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*
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* You should have received a copy of the GNU 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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*/
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#ifndef __MARLIN_SPI_H__
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#define __MARLIN_SPI_H__
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#include <stdint.h>
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#include "softspi.h"
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template<uint8_t MisoPin, uint8_t MosiPin, uint8_t SckPin>
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class SPI {
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static SoftSPI<MisoPin, MosiPin, SckPin> softSPI;
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public:
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FORCE_INLINE static void init() { softSPI.begin(); }
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FORCE_INLINE static void send(uint8_t data) { softSPI.send(data); }
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FORCE_INLINE static uint8_t receive() { return softSPI.receive(); }
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};
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// Hardware SPI
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template<>
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class SPI<MISO_PIN, MOSI_PIN, SCK_PIN> {
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public:
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FORCE_INLINE static void init() {
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OUT_WRITE(SCK_PIN, LOW);
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OUT_WRITE(MOSI_PIN, HIGH);
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SET_INPUT(MISO_PIN);
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WRITE(MISO_PIN, HIGH);
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}
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FORCE_INLINE static uint8_t receive() {
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SPDR = 0;
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while (!TEST(SPSR, SPIF)) { /* nada */ }
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return SPDR;
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}
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};
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#endif // __MARLIN_SPI_H__
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