micropython/ports/samd/modmachine.c

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2019 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.
 */

#include "py/runtime.h"
#include "extmod/machine_mem.h"
#include "samd_soc.h"

#if defined(MCU_SAMD21)
#define DBL_TAP_ADDR ((volatile uint32_t *)(0x20000000 + 32 * 1024 - 4))
#elif defined(MCU_SAMD51)
#define DBL_TAP_ADDR ((volatile uint32_t *)(0x20000000 + 192 * 1024 - 4))
#endif
#define DBL_TAP_MAGIC_LOADER 0xf01669ef
#define DBL_TAP_MAGIC_RESET 0xf02669ef

STATIC mp_obj_t machine_reset(void) {
    *DBL_TAP_ADDR = DBL_TAP_MAGIC_RESET;
    NVIC_SystemReset();
    return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_0(machine_reset_obj, machine_reset);

STATIC mp_obj_t machine_bootloader(void) {
    *DBL_TAP_ADDR = DBL_TAP_MAGIC_LOADER;
    NVIC_SystemReset();
    return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_0(machine_bootloader_obj, machine_bootloader);

STATIC mp_obj_t machine_freq(void) {
    return MP_OBJ_NEW_SMALL_INT(CPU_FREQ);
}
MP_DEFINE_CONST_FUN_OBJ_0(machine_freq_obj, machine_freq);

STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
    { MP_ROM_QSTR(MP_QSTR___name__),            MP_ROM_QSTR(MP_QSTR_umachine) },
    { MP_ROM_QSTR(MP_QSTR_reset),               MP_ROM_PTR(&machine_reset_obj) },
    { MP_ROM_QSTR(MP_QSTR_bootloader),          MP_ROM_PTR(&machine_bootloader_obj) },
    { MP_ROM_QSTR(MP_QSTR_freq),                MP_ROM_PTR(&machine_freq_obj) },
    { MP_ROM_QSTR(MP_QSTR_mem8),                MP_ROM_PTR(&machine_mem8_obj) },
    { MP_ROM_QSTR(MP_QSTR_mem16),               MP_ROM_PTR(&machine_mem16_obj) },
    { MP_ROM_QSTR(MP_QSTR_mem32),               MP_ROM_PTR(&machine_mem32_obj) },
};
STATIC MP_DEFINE_CONST_DICT(machine_module_globals, machine_module_globals_table);

const mp_obj_module_t mp_module_machine = {
    .base = { &mp_type_module },
    .globals = (mp_obj_dict_t *)&machine_module_globals,
};