Firmware2/Marlin/spi.h

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2017-01-08 17:08:50 +01:00
/**
* 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:
inline __attribute__((always_inline))
static void init() {
softSpi.begin();
}
inline __attribute__((always_inline))
static void send(uint8_t data) {
softSpi.send(data);
}
inline __attribute__((always_inline))
static uint8_t receive() {
return softSpi.receive();
}
};
//hardware spi
template<>
class Spi<MISO_PIN, MOSI_PIN, SCK_PIN> {
public:
inline __attribute__((always_inline))
static void init() {
OUT_WRITE(SCK_PIN, LOW);
OUT_WRITE(MOSI_PIN, HIGH);
SET_INPUT(MISO_PIN);
WRITE(MISO_PIN, HIGH);
}
inline __attribute__((always_inline))
static uint8_t receive() {
SPDR = 0;
for (;!TEST(SPSR, SPIF););
return SPDR;
}
};
#endif