1 files changed, 54 insertions, 0 deletions
diff --git a/Marlin/src/libs/private_spi.h b/Marlin/src/libs/private_spi.h
new file mode 100644
index 0000000..1d8eacd
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+++ b/Marlin/src/libs/private_spi.h
@@ -0,0 +1,54 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 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 <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#include "softspi.h"
+#include <stdint.h>
+
+template<uint8_t MisoPin, uint8_t MosiPin, uint8_t SckPin>
+class SPIclass {
+  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 SPIclass<SD_MISO_PIN, SD_MOSI_PIN, SD_SCK_PIN> {
+  public:
+    FORCE_INLINE static void init() {
+      OUT_WRITE(SD_SCK_PIN, LOW);
+      OUT_WRITE(SD_MOSI_PIN, HIGH);
+      SET_INPUT_PULLUP(SD_MISO_PIN);
+    }
+    FORCE_INLINE static uint8_t receive() {
+      #if defined(__AVR__) || defined(__MK20DX256__) || defined(__MK64FX512__) || defined(__MK66FX1M0__) || defined(__IMXRT1062__)
+        SPDR = 0;
+        for (;!TEST(SPSR, SPIF););
+        return SPDR;
+      #else
+        return spiRec();
+      #endif
+    }
+};