121 lines
3.7 KiB
C
121 lines
3.7 KiB
C
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/**
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* Marlin 3D Printer Firmware
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* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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This code contributed by Triffid_Hunter and modified by Kliment
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why double up on these macros? see http://gcc.gnu.org/onlinedocs/cpp/Stringification.html
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*/
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/**
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* Description: Fast IO functions for Teensy 3.5 and Teensy 3.6
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*/
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#ifndef _FASTIO_TEENSY_H
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#define _FASTIO_TEENSY_H
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/**
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utility functions
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*/
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#ifndef MASK
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#define MASK(PIN) (1 << PIN)
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#endif
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#define GPIO_BITBAND_ADDR(reg, bit) (((uint32_t)&(reg) - 0x40000000) * 32 + (bit) * 4 + 0x42000000)
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#define GPIO_BITBAND(reg, bit) (*(uint32_t *)GPIO_BITBAND_ADDR((reg), (bit)))
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/**
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magic I/O routines
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now you can simply SET_OUTPUT(STEP); WRITE(STEP, 1); WRITE(STEP, 0);
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*/
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/// Read a pin
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#define _READ(p) ((bool)(CORE_PIN ## p ## _PINREG & CORE_PIN ## p ## _BITMASK))
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/// Write to a pin
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#define _WRITE(p, v) do { if (v) CORE_PIN ## p ## _PORTSET = CORE_PIN ## p ## _BITMASK; \
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else CORE_PIN ## p ## _PORTCLEAR = CORE_PIN ## p ## _BITMASK; } while (0)
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/// toggle a pin
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#define _TOGGLE(p) (*(&(CORE_PIN ## p ## _PORTCLEAR)+1) = CORE_PIN ## p ## _BITMASK)
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/// set pin as input
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#define _SET_INPUT(p) do { CORE_PIN ## p ## _CONFIG = PORT_PCR_MUX(1); \
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GPIO_BITBAND(CORE_PIN ## p ## _DDRREG , CORE_PIN ## p ## _BIT) = 0; \
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} while (0)
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/// set pin as output
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#define _SET_OUTPUT(p) do { CORE_PIN ## p ## _CONFIG = PORT_PCR_MUX(1)|PORT_PCR_SRE|PORT_PCR_DSE; \
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GPIO_BITBAND(CORE_PIN ## p ## _DDRREG , CORE_PIN ## p ## _BIT) = 1; \
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} while (0)
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/// set pin as input with pullup mode
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//#define _PULLUP(IO, v) { pinMode(IO, (v!=LOW ? INPUT_PULLUP : INPUT)); }
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/// check if pin is an input
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#define _GET_INPUT(p) ((CORE_PIN ## p ## _DDRREG & CORE_PIN ## p ## _BITMASK) == 0)
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/// check if pin is an output
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#define _GET_OUTPUT(p) ((CORE_PIN ## p ## _DDRREG & CORE_PIN ## p ## _BITMASK) == 0)
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/// check if pin is an timer
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//#define _GET_TIMER(IO)
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// why double up on these macros? see http://gcc.gnu.org/onlinedocs/cpp/Stringification.html
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/// Read a pin wrapper
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#define READ(IO) _READ(IO)
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/// Write to a pin wrapper
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#define WRITE_VAR(IO, v) _WRITE_VAR(IO, v)
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#define WRITE(IO, v) _WRITE(IO, v)
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/// toggle a pin wrapper
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#define TOGGLE(IO) _TOGGLE(IO)
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/// set pin as input wrapper
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#define SET_INPUT(IO) _SET_INPUT(IO)
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/// set pin as input with pullup wrapper
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#define SET_INPUT_PULLUP(IO) do{ _SET_INPUT(IO); _WRITE(IO, HIGH); }while(0)
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/// set pin as output wrapper
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#define SET_OUTPUT(IO) _SET_OUTPUT(IO)
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/// check if pin is an input wrapper
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#define GET_INPUT(IO) _GET_INPUT(IO)
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/// check if pin is an output wrapper
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#define GET_OUTPUT(IO) _GET_OUTPUT(IO)
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// Shorthand
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#define OUT_WRITE(IO, v) { SET_OUTPUT(IO); WRITE(IO, v); }
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/**
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ports and functions
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added as necessary or if I feel like it- not a comprehensive list!
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*/
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/**
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pins
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*/
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#define DIO0_PIN 8
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#endif /* _FASTIO_TEENSY_H */
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