Shorter paths to HAL, ExtUI (#17156)

Marlin/src/HAL/LPC1768/include/SPI.h

@@ -0,0 +1,48 @@
+/**
+ * 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 <http://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#include "../../shared/HAL_SPI.h"
+
+#include <stdint.h>
+
+#define MSBFIRST 1
+#define SPI_MODE3 0
+
+class SPISettings {
+  public:
+    SPISettings(uint32_t speed, int, int) : spi_speed(speed) {};
+    uint32_t spiRate() { return spi_speed; }
+  private:
+    uint32_t spi_speed;
+};
+
+class SPIClass {
+  public:
+    void begin();
+    void beginTransaction(SPISettings);
+    void endTransaction() {};
+    uint8_t transfer(uint8_t data);
+    uint16_t transfer16(uint16_t data);
+};
+
+extern SPIClass SPI;