HAL for 32-bit Teensy (3.5, 3.6) architecture

Marlin/src/HAL/HAL_TEENSY35_36/fastio_Teensy.h

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+/**
+ * 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/>.
+ *
+ */
+
+/**
+  This code contributed by Triffid_Hunter and modified by Kliment
+  why double up on these macros? see http://gcc.gnu.org/onlinedocs/cpp/Stringification.html
+*/
+
+/**
+ * Description: Fast IO functions for Teensy 3.5 and Teensy 3.6
+ */
+
+#ifndef	_FASTIO_TEENSY_H
+#define	_FASTIO_TEENSY_H
+
+/**
+  utility functions
+*/
+
+#ifndef MASK
+  #define MASK(PIN)  (1 << PIN)
+#endif
+
+#define GPIO_BITBAND_ADDR(reg, bit) (((uint32_t)&(reg) - 0x40000000) * 32 + (bit) * 4 + 0x42000000)
+#define GPIO_BITBAND(reg, bit) (*(uint32_t *)GPIO_BITBAND_ADDR((reg), (bit)))
+
+/**
+  magic I/O routines
+  now you can simply SET_OUTPUT(STEP); WRITE(STEP, 1); WRITE(STEP, 0);
+*/
+
+/// Read a pin
+#define _READ(p) ((bool)(CORE_PIN ## p ## _PINREG & CORE_PIN ## p ## _BITMASK))
+
+/// Write to a pin
+#define _WRITE(p, v) do { if (v) CORE_PIN ## p ## _PORTSET = CORE_PIN ## p ## _BITMASK; \
+                            else CORE_PIN ## p ## _PORTCLEAR = CORE_PIN ## p ## _BITMASK; } while (0)
+
+/// toggle a pin
+#define _TOGGLE(p)  (*(&(CORE_PIN ## p ## _PORTCLEAR)+1) = CORE_PIN ## p ## _BITMASK)
+
+/// set pin as input
+  #define _SET_INPUT(p)   do { CORE_PIN ## p ## _CONFIG = PORT_PCR_MUX(1); \
+                            GPIO_BITBAND(CORE_PIN ## p ## _DDRREG , CORE_PIN ## p ## _BIT) = 0; \
+                            } while (0)
+/// set pin as output
+  #define _SET_OUTPUT(p)  do { CORE_PIN ## p ## _CONFIG = PORT_PCR_MUX(1)|PORT_PCR_SRE|PORT_PCR_DSE; \
+                            GPIO_BITBAND(CORE_PIN ## p ## _DDRREG , CORE_PIN ## p ## _BIT) = 1; \
+                            } while (0)
+
+/// set pin as input with pullup mode
+//#define _PULLUP(IO, v)  { pinMode(IO, (v!=LOW ? INPUT_PULLUP : INPUT)); }
+
+/// check if pin is an input
+#define _GET_INPUT(p)   ((CORE_PIN ## p ## _DDRREG & CORE_PIN ## p ## _BITMASK) == 0)
+/// check if pin is an output
+#define _GET_OUTPUT(p)  ((CORE_PIN ## p ## _DDRREG & CORE_PIN ## p ## _BITMASK) == 0)
+
+/// check if pin is an timer
+//#define _GET_TIMER(IO)
+
+//  why double up on these macros? see http://gcc.gnu.org/onlinedocs/cpp/Stringification.html
+
+/// Read a pin wrapper
+#define READ(IO)  _READ(IO)
+
+/// Write to a pin wrapper
+#define WRITE_VAR(IO, v)  _WRITE_VAR(IO, v)
+#define WRITE(IO, v)  _WRITE(IO, v)
+
+/// toggle a pin wrapper
+#define TOGGLE(IO)  _TOGGLE(IO)
+
+/// set pin as input wrapper
+#define SET_INPUT(IO)  _SET_INPUT(IO)
+/// set pin as input with pullup wrapper
+#define SET_INPUT_PULLUP(IO) do{ _SET_INPUT(IO); _WRITE(IO, HIGH); }while(0)
+/// set pin as output wrapper
+#define SET_OUTPUT(IO)  _SET_OUTPUT(IO)
+
+/// check if pin is an input wrapper
+#define GET_INPUT(IO)  _GET_INPUT(IO)
+/// check if pin is an output wrapper
+#define GET_OUTPUT(IO)  _GET_OUTPUT(IO)
+
+// Shorthand
+#define OUT_WRITE(IO, v) { SET_OUTPUT(IO); WRITE(IO, v); }
+
+/**
+  ports and functions
+
+  added as necessary or if I feel like it- not a comprehensive list!
+*/
+
+/**
+pins
+*/
+
+#define DIO0_PIN 8
+
+#endif	/* _FASTIO_TEENSY_H */