1 files changed, 115 insertions, 0 deletions
diff --git a/Marlin/src/HAL/ESP32/HAL_SPI.cpp b/Marlin/src/HAL/ESP32/HAL_SPI.cpp
new file mode 100644
index 0000000..8ee837b
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+++ b/Marlin/src/HAL/ESP32/HAL_SPI.cpp
@@ -0,0 +1,115 @@
+/**
+ * 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
+ * Copyright (c) 2017 Victor Perez
+ *
+ * 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/>.
+ *
+ */
+#ifdef ARDUINO_ARCH_ESP32
+
+#include "../../inc/MarlinConfig.h"
+
+#include "../shared/HAL_SPI.h"
+
+#include <pins_arduino.h>
+#include <SPI.h>
+
+// ------------------------
+// Public Variables
+// ------------------------
+
+static SPISettings spiConfig;
+
+// ------------------------
+// Public functions
+// ------------------------
+
+#if ENABLED(SOFTWARE_SPI)
+
+  // ------------------------
+  // Software SPI
+  // ------------------------
+  #error "Software SPI not supported for ESP32. Use Hardware SPI."
+
+#else
+
+// ------------------------
+// Hardware SPI
+// ------------------------
+
+void spiBegin() {
+  #if !PIN_EXISTS(SD_SS)
+    #error "SD_SS_PIN not defined!"
+  #endif
+
+  OUT_WRITE(SD_SS_PIN, HIGH);
+}
+
+void spiInit(uint8_t spiRate) {
+  uint32_t clock;
+
+  switch (spiRate) {
+    case SPI_FULL_SPEED:      clock = 16000000; break;
+    case SPI_HALF_SPEED:      clock = 8000000;  break;
+    case SPI_QUARTER_SPEED:   clock = 4000000;  break;
+    case SPI_EIGHTH_SPEED:    clock = 2000000;  break;
+    case SPI_SIXTEENTH_SPEED: clock = 1000000;  break;
+    case SPI_SPEED_5:         clock = 500000;   break;
+    case SPI_SPEED_6:         clock = 250000;   break;
+    default:                  clock = 1000000; // Default from the SPI library
+  }
+
+  spiConfig = SPISettings(clock, MSBFIRST, SPI_MODE0);
+  SPI.begin();
+}
+
+uint8_t spiRec() {
+  SPI.beginTransaction(spiConfig);
+  uint8_t returnByte = SPI.transfer(0xFF);
+  SPI.endTransaction();
+  return returnByte;
+}
+
+void spiRead(uint8_t* buf, uint16_t nbyte) {
+  SPI.beginTransaction(spiConfig);
+  SPI.transferBytes(0, buf, nbyte);
+  SPI.endTransaction();
+}
+
+void spiSend(uint8_t b) {
+  SPI.beginTransaction(spiConfig);
+  SPI.transfer(b);
+  SPI.endTransaction();
+}
+
+void spiSendBlock(uint8_t token, const uint8_t* buf) {
+  SPI.beginTransaction(spiConfig);
+  SPI.transfer(token);
+  SPI.writeBytes(const_cast<uint8_t*>(buf), 512);
+  SPI.endTransaction();
+}
+
+void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode) {
+  spiConfig = SPISettings(spiClock, bitOrder, dataMode);
+
+  SPI.beginTransaction(spiConfig);
+}
+
+#endif // !SOFTWARE_SPI
+
+#endif // ARDUINO_ARCH_ESP32