Shorter paths to HAL, ExtUI (#17156)

Marlin/src/HAL/STM32F1/spi_pins.h

@@ -0,0 +1,58 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * 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
+
+/**
+ * HAL for stm32duino.com based on Libmaple and compatible (STM32F1)
+ */
+
+/**
+ * STM32F1 Default SPI Pins
+ *
+ *         SS     SCK     MISO    MOSI
+ *       +-----------------------------+
+ *  SPI1 | PA4    PA5     PA6     PA7  |
+ *  SPI2 | PB12   PB13    PB14    PB15 |
+ *  SPI3 | PA15   PB3     PB4     PB5  |
+ *       +-----------------------------+
+ * Any pin can be used for Chip Select (SS_PIN)
+ * SPI1 is enabled by default
+ */
+#ifndef SCK_PIN
+  #define SCK_PIN  PA5
+#endif
+#ifndef MISO_PIN
+  #define MISO_PIN PA6
+#endif
+#ifndef MOSI_PIN
+  #define MOSI_PIN PA7
+#endif
+#ifndef SS_PIN
+  #define SS_PIN   PA4
+#endif
+#undef SDSS
+#define SDSS       SS_PIN
+
+#if ENABLED(ENABLE_SPI3)
+  #define SPI_DEVICE 3
+#elif ENABLED(ENABLE_SPI2)
+  #define SPI_DEVICE 2
+#else
+  #define SPI_DEVICE 1
+#endif