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rp2/machine_i2c: Factor default pin macros to header file.

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So they can be reused by the I2CTarget implementation.

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George 2025-07-30 11:23:11 +10:00
parent 01e570a347
commit 56d2b47370
2 changed files with 69 additions and 39 deletions
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40
ports/rp2/machine_i2c.c
View file

@ -28,51 +28,13 @@
#include "py/mphal.h"
#include "py/mperrno.h"
#include "extmod/modmachine.h"
#include "machine_i2c.h"
#include "hardware/i2c.h"
#define DEFAULT_I2C_FREQ (400000)
#define DEFAULT_I2C_TIMEOUT (50000)
#ifdef MICROPY_HW_I2C_NO_DEFAULT_PINS
// With no default I2C, need to require the pin args.
#define MICROPY_HW_I2C0_SCL (0)
#define MICROPY_HW_I2C0_SDA (0)
#define MICROPY_HW_I2C1_SCL (0)
#define MICROPY_HW_I2C1_SDA (0)
#define MICROPY_I2C_PINS_ARG_OPTS MP_ARG_REQUIRED
#else
// Most boards do not require pin args.
#define MICROPY_I2C_PINS_ARG_OPTS 0
#ifndef MICROPY_HW_I2C0_SCL
#if PICO_DEFAULT_I2C == 0
#define MICROPY_HW_I2C0_SCL (PICO_DEFAULT_I2C_SCL_PIN)
#define MICROPY_HW_I2C0_SDA (PICO_DEFAULT_I2C_SDA_PIN)
#else
#define MICROPY_HW_I2C0_SCL (9)
#define MICROPY_HW_I2C0_SDA (8)
#endif
#endif
#ifndef MICROPY_HW_I2C1_SCL
#if PICO_DEFAULT_I2C == 1
#define MICROPY_HW_I2C1_SCL (PICO_DEFAULT_I2C_SCL_PIN)
#define MICROPY_HW_I2C1_SDA (PICO_DEFAULT_I2C_SDA_PIN)
#else
#define MICROPY_HW_I2C1_SCL (7)
#define MICROPY_HW_I2C1_SDA (6)
#endif
#endif
#endif
// SDA/SCL on even/odd pins, I2C0/I2C1 on even/odd pairs of pins.
#define IS_VALID_SCL(i2c, pin) (((pin) & 1) == 1 && (((pin) & 2) >> 1) == (i2c))
#define IS_VALID_SDA(i2c, pin) (((pin) & 1) == 0 && (((pin) & 2) >> 1) == (i2c))
typedef struct _machine_i2c_obj_t {
mp_obj_base_t base;
i2c_inst_t *const i2c_inst;

68
ports/rp2/machine_i2c.h Normal file
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@ -0,0 +1,68 @@
/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2020-2025 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef MICROPY_INCLUDED_RP2_MACHINE_I2C_H
#define MICROPY_INCLUDED_RP2_MACHINE_I2C_H
#ifdef MICROPY_HW_I2C_NO_DEFAULT_PINS
// With no default I2C, need to require the pin args.
#define MICROPY_HW_I2C0_SCL (0)
#define MICROPY_HW_I2C0_SDA (0)
#define MICROPY_HW_I2C1_SCL (0)
#define MICROPY_HW_I2C1_SDA (0)
#define MICROPY_I2C_PINS_ARG_OPTS MP_ARG_REQUIRED
#else
// Most boards do not require pin args.
#define MICROPY_I2C_PINS_ARG_OPTS 0
#ifndef MICROPY_HW_I2C0_SCL
#if PICO_DEFAULT_I2C == 0
#define MICROPY_HW_I2C0_SCL (PICO_DEFAULT_I2C_SCL_PIN)
#define MICROPY_HW_I2C0_SDA (PICO_DEFAULT_I2C_SDA_PIN)
#else
#define MICROPY_HW_I2C0_SCL (9)
#define MICROPY_HW_I2C0_SDA (8)
#endif
#endif
#ifndef MICROPY_HW_I2C1_SCL
#if PICO_DEFAULT_I2C == 1
#define MICROPY_HW_I2C1_SCL (PICO_DEFAULT_I2C_SCL_PIN)
#define MICROPY_HW_I2C1_SDA (PICO_DEFAULT_I2C_SDA_PIN)
#else
#define MICROPY_HW_I2C1_SCL (7)
#define MICROPY_HW_I2C1_SDA (6)
#endif
#endif
#endif
// SDA/SCL on even/odd pins, I2C0/I2C1 on even/odd pairs of pins.
#define IS_VALID_SCL(i2c, pin) (((pin) & 1) == 1 && (((pin) & 2) >> 1) == (i2c))
#define IS_VALID_SDA(i2c, pin) (((pin) & 1) == 0 && (((pin) & 2) >> 1) == (i2c))
#endif // MICROPY_INCLUDED_RP2_MACHINE_I2C_H