142 lines
4.8 KiB
C
142 lines
4.8 KiB
C
/**
|
|
* 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/>.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* Fast I/O Routines for LPC1768/9
|
|
* Use direct port manipulation to save scads of processor time.
|
|
* Contributed by Triffid_Hunter and modified by Kliment, thinkyhead, Bob-the-Kuhn, et.al.
|
|
*/
|
|
|
|
/**
|
|
* Description: Fast IO functions LPC1768
|
|
*
|
|
* For TARGET LPC1768
|
|
*/
|
|
|
|
#ifndef _FASTIO_LPC1768_H
|
|
#define _FASTIO_LPC1768_H
|
|
|
|
#include <LPC17xx.h>
|
|
#include <Arduino.h>
|
|
#include <pinmapping.h>
|
|
|
|
bool useable_hardware_PWM(pin_t pin);
|
|
#define USEABLE_HARDWARE_PWM(pin) useable_hardware_PWM(pin)
|
|
|
|
#define LPC_PORT_OFFSET (0x0020)
|
|
#define LPC_PIN(pin) (1UL << pin)
|
|
#define LPC_GPIO(port) ((volatile LPC_GPIO_TypeDef *)(LPC_GPIO0_BASE + LPC_PORT_OFFSET * port))
|
|
|
|
#define SET_DIR_INPUT(IO) (LPC_GPIO(LPC1768_PIN_PORT(IO))->FIODIR &= ~LPC_PIN(LPC1768_PIN_PIN(IO)))
|
|
#define SET_DIR_OUTPUT(IO) (LPC_GPIO(LPC1768_PIN_PORT(IO))->FIODIR |= LPC_PIN(LPC1768_PIN_PIN(IO)))
|
|
|
|
#define SET_MODE(IO, mode) (pin_mode((LPC1768_PIN_PORT(IO), LPC1768_PIN_PIN(IO)), mode))
|
|
|
|
#define WRITE_PIN_SET(IO) (LPC_GPIO(LPC1768_PIN_PORT(IO))->FIOSET = LPC_PIN(LPC1768_PIN_PIN(IO)))
|
|
#define WRITE_PIN_CLR(IO) (LPC_GPIO(LPC1768_PIN_PORT(IO))->FIOCLR = LPC_PIN(LPC1768_PIN_PIN(IO)))
|
|
|
|
#define READ_PIN(IO) ((LPC_GPIO(LPC1768_PIN_PORT(IO))->FIOPIN & LPC_PIN(LPC1768_PIN_PIN(IO))) ? 1 : 0)
|
|
#define WRITE_PIN(IO, v) ((v) ? WRITE_PIN_SET(IO) : WRITE_PIN_CLR(IO))
|
|
|
|
/**
|
|
* Magic I/O routines
|
|
*
|
|
* Now you can simply SET_OUTPUT(STEP); WRITE(STEP, HIGH); WRITE(STEP, LOW);
|
|
*
|
|
* Why double up on these macros? see http://gcc.gnu.org/onlinedocs/cpp/Stringification.html
|
|
*/
|
|
|
|
/// Read a pin
|
|
#define _READ(IO) READ_PIN(IO)
|
|
|
|
/// Write to a pin
|
|
#define _WRITE_VAR(IO, v) digitalWrite(IO, v)
|
|
|
|
#define _WRITE(IO, v) WRITE_PIN(IO, v)
|
|
|
|
/// toggle a pin
|
|
#define _TOGGLE(IO) _WRITE(IO, !READ(IO))
|
|
|
|
/// set pin as input
|
|
#define _SET_INPUT(IO) SET_DIR_INPUT(IO)
|
|
|
|
/// set pin as output
|
|
#define _SET_OUTPUT(IO) SET_DIR_OUTPUT(IO)
|
|
|
|
/// set pin as input with pullup mode
|
|
#define _PULLUP(IO, v) (pinMode(IO, (v!=LOW ? INPUT_PULLUP : INPUT)))
|
|
|
|
/// set pin as input with pulldown mode
|
|
#define _PULLDOWN(IO, v) (pinMode(IO, (v!=LOW ? INPUT_PULLDOWN : INPUT)))
|
|
|
|
// hg42: all pins can be input or output (I hope)
|
|
// hg42: undefined pins create compile error (IO, is no pin)
|
|
// hg42: currently not used, but was used by pinsDebug
|
|
|
|
/// check if pin is an input
|
|
#define _GET_INPUT(IO) (LPC1768_PIN_PIN(IO)>=0)
|
|
|
|
/// check if pin is an output
|
|
#define _GET_OUTPUT(IO) (LPC1768_PIN_PIN(IO)>=0)
|
|
|
|
// hg42: GET_TIMER is used only to check if it's a PWM pin
|
|
// hg42: we cannot use USEABLE_HARDWARE_PWM because it uses a function that cannot be used statically
|
|
// hg42: instead use PWM bit from the #define
|
|
|
|
/// check if pin is a timer
|
|
#define _GET_TIMER(IO) TRUE // could be LPC1768_PIN_PWM(IO), but there
|
|
// hg42: could be this:
|
|
// #define _GET_TIMER(IO) LPC1768_PIN_PWM(IO)
|
|
// but this is an incomplete check (12 pins are PWMable, but only 6 can be used at the same time)
|
|
|
|
/// 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); _PULLUP(IO, HIGH); }while(0)
|
|
/// set pin as input with pulldown wrapper
|
|
#define SET_INPUT_PULLDOWN(IO) do{ _SET_INPUT(IO); _PULLDOWN(IO, HIGH); }while(0)
|
|
/// set pin as output wrapper - reads the pin and sets the output to that value
|
|
#define SET_OUTPUT(IO) do{ _WRITE(IO, _READ(IO)); _SET_OUTPUT(IO); }while(0)
|
|
|
|
/// 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)
|
|
|
|
/// check if pin is a timer (wrapper)
|
|
#define GET_TIMER(IO) _GET_TIMER(IO)
|
|
|
|
// Shorthand
|
|
#define OUT_WRITE(IO, v) { SET_OUTPUT(IO); WRITE(IO, v); }
|
|
|
|
#endif // _FASTIO_LPC1768_H
|