LPC176x Framework SPI Fixes for MAX6675, MAX31855 and MAX31865 SPI boards

Marlin/src/HAL/LPC1768/inc/SanityCheck.h

@@ -31,7 +31,7 @@
 /**
  * Detect an old pins file by checking for old ADC pins values.
  */
-#define _OLD_TEMP_PIN(P) PIN_EXISTS(P) && _CAT(P,_PIN) <= 7 && _CAT(P,_PIN) != 2 && _CAT(P,_PIN) != 3
+#define _OLD_TEMP_PIN(P) PIN_EXISTS(P) && _CAT(P,_PIN) <= 7 && !WITHIN(_CAT(P,_PIN), TERN(LPC1768_IS_SKRV1_3, 0, 2), 3)  // Include P0_00 and P0_01 for SKR V1.3 board
 #if _OLD_TEMP_PIN(TEMP_BED)
   #error "TEMP_BED_PIN must be defined using the Pn_nn or Pn_nn_An format. (See the included pins files)."
 #elif _OLD_TEMP_PIN(TEMP_0)

Marlin/src/MarlinCore.cpp

@@ -937,14 +937,6 @@ void setup() {
 
   SETUP_RUN(HAL_init());
 
-  // Init and disable SPI thermocouples
-  #if TEMP_SENSOR_0_IS_MAX6675
-    OUT_WRITE(MAX6675_SS_PIN, HIGH);  // Disable
-  #endif
-  #if TEMP_SENSOR_1_IS_MAX6675
-    OUT_WRITE(MAX6675_SS2_PIN, HIGH); // Disable
-  #endif
-
   #if HAS_L64XX
     SETUP_RUN(L64xxManager.init());  // Set up SPI, init drivers
   #endif

Marlin/src/inc/Conditionals_post.h

@@ -490,6 +490,90 @@
   #define HAS_MAX6675 1
 #endif
 
+//
+// Compatibility layer for MAX (SPI) temp boards
+//
+#if PIN_EXISTS(MAX6675_SS)
+  #if TEMP_SENSOR_0_IS_MAX31855
+    #define MAX31855_CS_PIN MAX6675_SS_PIN
+  #elif TEMP_SENSOR_0_IS_MAX31865
+    #define MAX31865_CS_PIN MAX6675_SS_PIN
+  #elif TEMP_SENSOR_0_IS_MAX6675
+    #define MAX6675_CS_PIN MAX6675_SS_PIN
+  #endif
+#endif
+
+#if PIN_EXISTS(MAX6675_SS2)
+  #if TEMP_SENSOR_1_IS_MAX31855
+    #define MAX31855_CS2_PIN MAX6675_SS2_PIN
+  #elif TEMP_SENSOR_1_IS_MAX31865
+    #define MAX31865_CS2_PIN MAX6675_SS2_PIN
+  #elif TEMP_SENSOR_1_IS_MAX6675
+    #define MAX6675_CS2_PIN MAX6675_SS2_PIN
+  #endif
+#endif
+
+#if PIN_EXISTS(MAX6675_DO)
+  #if HAS_MAX31855
+    #define MAX31855_MISO_PIN MAX6675_DO_PIN
+  #elif HAS_MAX31865
+    #define MAX31865_MISO_PIN MAX6675_DO_PIN
+  #elif HAS_MAX6675
+    #define MAX6675_MISO_PIN MAX6675_DO_PIN
+  #endif
+#endif
+
+#if PIN_EXISTS(MAX6675_SCK)
+  #if HAS_MAX31855
+    #define MAX31855_SCK_PIN MAX6675_SCK_PIN
+  #elif HAS_MAX31865
+    #define MAX31865_SCK_PIN MAX6675_SCK_PIN
+  #endif
+#endif
+
+// Compatibility Layer for use when HAL manipulates PINS for MAX31855 and MAX6675
+#if PIN_EXISTS(MAX31855_CS) && !PIN_EXISTS(MAX6675_SS)
+ #define MAX6675_SS_PIN MAX31855_CS_PIN
+#endif
+#if PIN_EXISTS(MAX31855_CS2) && !PIN_EXISTS(MAX6675_SS2)
+ #define MAX6675_SS2_PIN MAX31855_CS2_PIN
+#endif
+#if PIN_EXISTS(MAX6675_CS) && !PIN_EXISTS(MAX6675_SS)
+ #define MAX6675_SS_PIN MAX6675_CS_PIN
+#endif
+#if PIN_EXISTS(MAX6675_CS2) && !PIN_EXISTS(MAX6675_SS2)
+ #define MAX6675_SS2_PIN MAX6675_CS2_PIN
+#endif
+#if PIN_EXISTS(MAX31855_MISO) && !PIN_EXISTS(MAX6675_DO)
+  #define MAX6675_DO_PIN MAX31855_MISO_PIN
+#endif
+#if PIN_EXISTS(MAX6675_MISO) && !PIN_EXISTS(MAX6675_DO)
+  #define MAX6675_DO_PIN MAX6675_MISO_PIN
+#endif
+#if PIN_EXISTS(MAX31855_SCK) && !PIN_EXISTS(MAX6675_SCK)
+  #define MAX6675_SCK_PIN MAX31855_SCK_PIN
+#endif
+
+//
+// User-defined thermocouple libraries
+//
+// Add LIB_MAX6675 / LIB_MAX31855 / LIB_MAX31865 to the build_flags
+// to select a USER library for MAX6675, MAX31855, MAX31865
+//
+#if BOTH(HAS_MAX6675, LIB_MAX6675)
+  #define LIB_USR_MAX6675 1
+#endif
+#if BOTH(HAS_MAX31855, LIB_MAX31855)
+  #define LIB_USR_MAX31855 1
+#endif
+#if HAS_MAX31865
+  #if ENABLED(LIB_MAX31865)
+    #define LIB_USR_MAX31865 1
+  #else
+    #define LIB_ADAFRUIT_MAX31865 1
+  #endif
+#endif
+
 #if TEMP_SENSOR_2 == -4
   #define TEMP_SENSOR_2_IS_AD8495 1
 #elif TEMP_SENSOR_2 == -3