MicroPython C模块实现笔记

demo.c

#include <stdio.h>

#include "py/runtime.h"
#include "py/mphal.h"

STATIC mp_obj_t pytest_test(void) 
{
  printf("pytest module");
  return mp_obj_new_int(0);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(pydev_test_obj, pytest_test);

STATIC const mp_rom_map_elem_t pytest_table[] = {  
    { MP_ROM_QSTR(MP_QSTR_val),  MP_ROM_INT(1)}
};
STATIC MP_DEFINE_CONST_DICT(pytest_table_dict, pytest_table);
//将dict封装成object，可以使用pytest.table.val访问
MP_DEFINE_CONST_OBJ_TYPE(pytest_mp_type, 
                        MP_QSTR_table, 
                        MP_TYPE_FLAG_NONE, 
                        locals_dict, &pytest_table_dict);

STATIC const mp_rom_map_elem_t pytest_module_globals_table[] = {
    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_pytest) },

    //导入OBJ指针，可以是函数或者对象
    //导入函数, 访问为pytest.test()
    { MP_ROM_QSTR(MP_QSTR_test), MP_ROM_PTR(&pydev_test_obj) },

    //导入为对象, 可通过pytest.table访问
    { MP_ROM_QSTR(MP_QSTR_table), MP_ROM_PTR(&pytest_mp_type) },

    //定义int类型的变量，调用方式pytest.num
    { MP_ROM_QSTR(MP_QSTR_num), MP_ROM_INT(1) },
};

STATIC MP_DEFINE_CONST_DICT(pytest_module_globals, pytest_module_globals_table);

// Define module object.
const mp_obj_module_t pytest_module = {
    .base = { &mp_type_module },
    .globals = (mp_obj_dict_t *)&pytest_module_globals,
};

// Register the module to make it available in Python.
// MP_QSTR_<module>，这里的module即为最终导入的module名
// import pytest
// 即可导入模块
MP_REGISTER_MODULE(MP_QSTR_pytest, pytest_module);