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MarlinFirmware/Marlin/spi.h
2017-05-22 17:38:58 -05:00

58 lines
1.6 KiB
C++

/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef __SPI_H__
#define __SPI_H__
#include <stdint.h>
#include "softspi.h"
template<uint8_t MisoPin, uint8_t MosiPin, uint8_t SckPin>
class SPI {
static SoftSPI<MisoPin, MosiPin, SckPin> softSPI;
public:
FORCE_INLINE static void init() { softSPI.begin(); }
FORCE_INLINE static void send(uint8_t data) { softSPI.send(data); }
FORCE_INLINE static uint8_t receive() { return softSPI.receive(); }
};
// Hardware SPI
template<>
class SPI<MISO_PIN, MOSI_PIN, SCK_PIN> {
public:
FORCE_INLINE static void init() {
OUT_WRITE(SCK_PIN, LOW);
OUT_WRITE(MOSI_PIN, HIGH);
SET_INPUT(MISO_PIN);
WRITE(MISO_PIN, HIGH);
}
FORCE_INLINE static uint8_t receive() {
SPDR = 0;
for (;!TEST(SPSR, SPIF););
return SPDR;
}
};
#endif // __SPI_H__