120 lines
3.7 KiB
C
120 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 LPC1768
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*
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* For TARGET LPC1768
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*/
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#ifndef _FASTIO_LPC1768_H
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#define _FASTIO_LPC1768_H
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#include <LPC17xx.h>
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#include "arduino.h"
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#include "pinmapping.h"
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#define LPC_PORT_OFFSET (0x0020)
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#define LPC_PIN(pin) (1UL << pin)
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#define LPC_GPIO(port) ((volatile LPC_GPIO_TypeDef *)(LPC_GPIO0_BASE + LPC_PORT_OFFSET * port))
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#define SET_DIR_INPUT(IO) (LPC_GPIO(DIO ## IO ## _PORT)->FIODIR &= ~LPC_PIN(DIO ## IO ##_PIN))
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#define SET_DIR_OUTPUT(IO) (LPC_GPIO(DIO ## IO ## _PORT)->FIODIR |= LPC_PIN(DIO ## IO ##_PIN))
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#define SET_MODE(IO, mode) (pin_mode((DIO ## IO ## _PORT, DIO ## IO ## _PIN), mode))
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#define WRITE_PIN_SET(IO) (LPC_GPIO(DIO ## IO ## _PORT)->FIOSET = LPC_PIN(DIO ## IO ##_PIN))
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#define WRITE_PIN_CLR(IO) (LPC_GPIO(DIO ## IO ## _PORT)->FIOCLR = LPC_PIN(DIO ## IO ##_PIN))
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#define READ_PIN(IO) ((LPC_GPIO(DIO ## IO ## _PORT)->FIOPIN & LPC_PIN(DIO ## IO ##_PIN)) ? 1 : 0)
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#define WRITE_PIN(IO, v) ((v) ? WRITE_PIN_SET(IO) : WRITE_PIN_CLR(IO))
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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(IO) READ_PIN(IO)
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/// Write to a pin
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#define _WRITE_VAR(IO, v) digitalWrite(IO, v)
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#define _WRITE(IO, v) WRITE_PIN(IO, v)
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/// toggle a pin
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#define _TOGGLE(IO) _WRITE(IO, !READ(IO))
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/// set pin as input
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#define _SET_INPUT(IO) SET_DIR_INPUT(IO)
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/// set pin as output
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#define _SET_OUTPUT(IO) SET_DIR_OUTPUT(IO)
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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(IO)
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/// check if pin is an output
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#define _GET_OUTPUT(IO)
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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); _PULLUP(IO, HIGH); }while(0)
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/// set pin as output wrapper
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#define SET_OUTPUT(IO) do{ _SET_OUTPUT(IO); _WRITE(IO, LOW); }while(0)
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/// check if pin is an input wrapper
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#define GET_INPUT(IO) _GET_INPUT(IO) // todo: Never used?
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/// check if pin is an output wrapper
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#define GET_OUTPUT(IO) _GET_OUTPUT(IO) //todo: Never Used?
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/// check if pin is an timer wrapper
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#define GET_TIMER(IO) _GET_TIMER(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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#endif // _FASTIO_LPC1768_H
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