Make board optionally mutable

Author: tannewt

ports/espressif/boards/yoto_mini_2024/mpconfigboard.h

@@ -11,6 +11,8 @@
 #define MICROPY_HW_BOARD_NAME       "Yoto Mini 2024"
 #define MICROPY_HW_MCU_NAME         "ESP32"
 
+#define CIRCUITPY_MUTABLE_BOARD (1)
+
 #define CIRCUITPY_BOARD_I2C         (1)
 #define CIRCUITPY_BOARD_I2C_PIN     {{.scl = &pin_GPIO25, .sda = &pin_GPIO21}}
 #define CIRCUITPY_BOARD_I2C_SPEED   (400000)

ports/espressif/boards/yoto_player_v3/mpconfigboard.h

@@ -11,6 +11,8 @@
 #define MICROPY_HW_BOARD_NAME       "Yoto Player V3"
 #define MICROPY_HW_MCU_NAME         "ESP32"
 
+#define CIRCUITPY_MUTABLE_BOARD (1)
+
 #define CIRCUITPY_BOARD_I2C         (1)
 #define CIRCUITPY_BOARD_I2C_PIN     {{.scl = &pin_GPIO25, .sda = &pin_GPIO21}}
 #define CIRCUITPY_BOARD_I2C_SPEED   (400000)

py/circuitpy_mpconfig.h

@@ -317,6 +317,10 @@ typedef long mp_off_t;
 
 // Default board buses.
 
+#ifndef CIRCUITPY_MUTABLE_BOARD
+#define CIRCUITPY_MUTABLE_BOARD (0)
+#endif
+
 #ifndef CIRCUITPY_BOARD_I2C
 #if defined(DEFAULT_I2C_BUS_SCL) && defined(DEFAULT_I2C_BUS_SDA)
 #define CIRCUITPY_BOARD_I2C     (1)

shared-bindings/board/__init__.h

@@ -11,7 +11,11 @@
 
 #include "shared-bindings/microcontroller/Pin.h"  // for the pin definitions
 
+#if CIRCUITPY_MUTABLE_BOARD
 extern mp_obj_dict_t board_module_globals;
+#else
+extern const mp_obj_dict_t board_module_globals;
+#endif
 static const MP_DEFINE_STR_OBJ(board_module_id_obj, CIRCUITPY_BOARD_ID);
 
 mp_obj_t common_hal_board_get_i2c(const mp_int_t instance);