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- /**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 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 <https://www.gnu.org/licenses/>.
- *
- */
- #pragma once
-
- #include "i2s.h"
-
- /**
- * Utility functions
- */
-
- // I2S expander pin mapping.
- #define IS_I2S_EXPANDER_PIN(IO) TEST(IO, 7)
- #define I2S_EXPANDER_PIN_INDEX(IO) (IO & 0x7F)
-
- // Set pin as input
- #define _SET_INPUT(IO) pinMode(IO, INPUT)
-
- // Set pin as output
- #define _SET_OUTPUT(IO) pinMode(IO, OUTPUT)
-
- // Set pin as input with pullup mode
- #define _PULLUP(IO, v) pinMode(IO, v ? INPUT_PULLUP : INPUT)
-
- // Read a pin wrapper
- #define READ(IO) (IS_I2S_EXPANDER_PIN(IO) ? i2s_state(I2S_EXPANDER_PIN_INDEX(IO)) : digitalRead(IO))
-
- // Write to a pin wrapper
- #define WRITE(IO, v) (IS_I2S_EXPANDER_PIN(IO) ? i2s_write(I2S_EXPANDER_PIN_INDEX(IO), v) : digitalWrite(IO, v))
-
- // 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 output wrapper
- #define SET_OUTPUT(IO) do{ _SET_OUTPUT(IO); }while(0)
-
- // Set pin as PWM
- #define SET_PWM SET_OUTPUT
-
- // Set pin as output and init
- #define OUT_WRITE(IO,V) do{ _SET_OUTPUT(IO); WRITE(IO,V); }while(0)
-
- // digitalRead/Write wrappers
- #define extDigitalRead(IO) digitalRead(IO)
- #define extDigitalWrite(IO,V) digitalWrite(IO,V)
-
- // PWM outputs
- #define PWM_PIN(P) (P < 34 || P > 127) // NOTE Pins >= 34 are input only on ESP32, so they can't be used for output.
-
- // Toggle pin value
- #define TOGGLE(IO) WRITE(IO, !READ(IO))
-
- //
- // Ports and functions
- //
-
- // UART
- #define RXD 3
- #define TXD 1
-
- // TWI (I2C)
- #define SCL 5
- #define SDA 4
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