Relocate SPI.h to the HAL folder

Marlin/src/HAL/HAL.h

@@ -29,7 +29,7 @@
 #ifndef _HAL_H
 #define _HAL_H
 
-#include "../inc/SPI.h"
+#include "SPI.h"
 
 #ifdef __AVR__
   #include "HAL_AVR/HAL_AVR.h"

Marlin/src/HAL/HAL_STM32F1/HAL_spi_Stm32f1.cpp

@@ -37,7 +37,7 @@
 // --------------------------------------------------------------------------
 
 #include "../HAL.h"
-#include "SPI.h"
+#include "../SPI.h"
 #include "pins_arduino.h"
 #include "spi_pins.h"
 #include "../../core/macros.h"

Marlin/src/inc/SPI.h → Marlin/src/HAL/SPI.h

-#include <stdint.h>
+/**
+ * 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/>.
+ *
+ */
 
+/**
+ * HAL/SPI.h
+ * Core Marlin definitions for SPI, implemented in the HALs
+ */
+
+#ifndef _SPI_H_
+#define _SPI_H_
+
+//#include "../inc/MarlinConfig.h"
+
+#include <stdint.h>
 
 #ifndef SPI_FULL_SPEED
 
@@ -20,20 +51,13 @@
  *  On other platforms, speed should be in range given above where possible.
  */
 
-/** Set SCK to max rate */
-#define SPI_FULL_SPEED 0
-/** Set SCK rate to half max rate. */
-#define SPI_HALF_SPEED 1
-/** Set SCK rate to quarter max rate. */
-#define SPI_QUARTER_SPEED 2
-/** Set SCK rate to 1/8 max rate. */
-#define SPI_EIGHTH_SPEED 3
-/** Set SCK rate to 1/16 of max rate. */
-#define SPI_SIXTEENTH_SPEED 4
-/** Set SCK rate to 1/32 of max rate. */
-#define SPI_SPEED_5 5
-/** Set SCK rate to 1/64 of max rate. */
-#define SPI_SPEED_6 6
+#define SPI_FULL_SPEED      0   // Set SCK to max rate
+#define SPI_HALF_SPEED      1   // Set SCK rate to half of max rate
+#define SPI_QUARTER_SPEED   2   // Set SCK rate to quarter of max rate
+#define SPI_EIGHTH_SPEED    3   // Set SCK rate to 1/8 of max rate
+#define SPI_SIXTEENTH_SPEED 4   // Set SCK rate to 1/16 of max rate
+#define SPI_SPEED_5         5   // Set SCK rate to 1/32 of max rate
+#define SPI_SPEED_6         6   // Set SCK rate to 1/64 of max rate
 
 // Standard SPI functions
 /** Initialise SPI bus */
@@ -49,4 +73,6 @@ void spiRead(uint8_t* buf, uint16_t nbyte);
 /** Write token and then write from 512 byte buffer to SPI (for SD card) */
 void spiSendBlock(uint8_t token, const uint8_t* buf);
 
-#endif
+#endif // SPI_FULL_SPEED
+
+#endif // _SPI_H_

Marlin/src/inc/MarlinConfig.h

@@ -26,7 +26,7 @@
 #include "../core/boards.h"
 #include "../core/macros.h"
 #include "Version.h"
-#include "SPI.h"
+#include "../HAL/SPI.h"
 #include "../../Configuration.h"
 #include "Conditionals_LCD.h"
 #include "../../Configuration_adv.h"