85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2019 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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#pragma once
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#include "i2s.h"
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/**
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* Utility functions
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*/
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// I2S expander pin mapping.
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#define IS_I2S_EXPANDER_PIN(IO) TEST(IO, 7)
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#define I2S_EXPANDER_PIN_INDEX(IO) (IO & 0x7F)
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// Set pin as input
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#define _SET_INPUT(IO) pinMode(IO, INPUT)
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// Set pin as output
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#define _SET_OUTPUT(IO) pinMode(IO, OUTPUT)
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// Set pin as input with pullup mode
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#define _PULLUP(IO, v) pinMode(IO, v ? INPUT_PULLUP : INPUT)
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// Read a pin wrapper
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#define READ(IO) (IS_I2S_EXPANDER_PIN(IO) ? i2s_state(I2S_EXPANDER_PIN_INDEX(IO)) : digitalRead(IO))
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// Write to a pin wrapper
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#define WRITE(IO, v) (IS_I2S_EXPANDER_PIN(IO) ? i2s_write(I2S_EXPANDER_PIN_INDEX(IO), v) : digitalWrite(IO, v))
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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); }while(0)
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// Set pin as PWM
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#define SET_PWM(IO) SET_OUTPUT(IO)
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// Set pin as output and init
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#define OUT_WRITE(IO,V) do{ _SET_OUTPUT(IO); WRITE(IO,V); }while(0)
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// digitalRead/Write wrappers
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#define extDigitalRead(IO) digitalRead(IO)
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#define extDigitalWrite(IO,V) digitalWrite(IO,V)
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// PWM outputs
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#define PWM_PIN(P) (P < 34) // NOTE Pins >= 34 are input only on ESP32, so they can't be used for output.
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// Toggle pin value
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#define TOGGLE(IO) WRITE(IO, !READ(IO))
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//
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// Ports and functions
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//
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// UART
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#define RXD 3
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#define TXD 1
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// TWI (I2C)
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#define SCL 5
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#define SDA 4
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