esp32/machine_i2c: Factor default pin macros to header file.

So the implementation of I2CTarget can use them.

Signed-off-by: Damien George <[email protected]>

Author: dpgeorge

ports/esp32/machine_i2c.c

@@ -28,32 +28,13 @@
 #include "py/mphal.h"
 #include "py/mperrno.h"
 #include "extmod/modmachine.h"
+#include "machine_i2c.h"
 
 #include "driver/i2c.h"
 #include "hal/i2c_ll.h"
 
 #if MICROPY_PY_MACHINE_I2C || MICROPY_PY_MACHINE_SOFTI2C
 
-#ifndef MICROPY_HW_I2C0_SCL
-#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
-#define MICROPY_HW_I2C0_SCL (GPIO_NUM_9)
-#define MICROPY_HW_I2C0_SDA (GPIO_NUM_8)
-#else
-#define MICROPY_HW_I2C0_SCL (GPIO_NUM_18)
-#define MICROPY_HW_I2C0_SDA (GPIO_NUM_19)
-#endif
-#endif
-
-#ifndef MICROPY_HW_I2C1_SCL
-#if CONFIG_IDF_TARGET_ESP32
-#define MICROPY_HW_I2C1_SCL (GPIO_NUM_25)
-#define MICROPY_HW_I2C1_SDA (GPIO_NUM_26)
-#else
-#define MICROPY_HW_I2C1_SCL (GPIO_NUM_9)
-#define MICROPY_HW_I2C1_SDA (GPIO_NUM_8)
-#endif
-#endif
-
 #if SOC_I2C_SUPPORT_XTAL
 #if CONFIG_XTAL_FREQ > 0
 #define I2C_SCLK_FREQ (CONFIG_XTAL_FREQ * 1000000)

ports/esp32/machine_i2c.h

@@ -0,0 +1,52 @@
+
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019-2025 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_ESP32_MACHINE_I2C_H
+#define MICROPY_INCLUDED_ESP32_MACHINE_I2C_H
+
+// Configure default I2C0 pins.
+#ifndef MICROPY_HW_I2C0_SCL
+#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
+#define MICROPY_HW_I2C0_SCL (GPIO_NUM_9)
+#define MICROPY_HW_I2C0_SDA (GPIO_NUM_8)
+#else
+#define MICROPY_HW_I2C0_SCL (GPIO_NUM_18)
+#define MICROPY_HW_I2C0_SDA (GPIO_NUM_19)
+#endif
+#endif
+
+// Configure default I2C1 pins.
+#ifndef MICROPY_HW_I2C1_SCL
+#if CONFIG_IDF_TARGET_ESP32
+#define MICROPY_HW_I2C1_SCL (GPIO_NUM_25)
+#define MICROPY_HW_I2C1_SDA (GPIO_NUM_26)
+#else
+#define MICROPY_HW_I2C1_SCL (GPIO_NUM_9)
+#define MICROPY_HW_I2C1_SDA (GPIO_NUM_8)
+#endif
+#endif
+
+#endif // MICROPY_INCLUDED_ESP32_MACHINE_I2C_H