CircuitPython

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/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 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 <stdint.h>
#include <stdio.h>
#include <string.h>
#include <p33Fxxxx.h>

#include "py/compile.h"
#include "py/runtime.h"
#include "py/gc.h"
#include "py/mphal.h"
#include "py/mperrno.h"
#include "lib/utils/pyexec.h"
#include "lib/mp-readline/readline.h"
#include "board.h"
#include "modpyb.h"

_FGS(GWRP_OFF & GCP_OFF);
_FOSCSEL(FNOSC_FRC);
_FOSC(FCKSM_CSECMD & OSCIOFNC_ON & POSCMD_NONE);
_FWDT(FWDTEN_OFF);

// maximum heap for device with 8k RAM
static char heap[4600];

int main(int argc, char **argv) {
    // init the CPU and the peripherals
    cpu_init();
    led_init();
    switch_init();
    uart_init();

soft_reset:

    // flash green led for 150ms to indicate boot
    led_state(1, 0);
    led_state(2, 0);
    led_state(3, 1);
    mp_hal_delay_ms(150);
    led_state(3, 0);

    // init MicroPython runtime
    int stack_dummy;
    MP_STATE_THREAD(stack_top) = (char*)&stack_dummy;
    gc_init(heap, heap + sizeof(heap));
    mp_init();
    mp_hal_init();
    readline_init0();

    // REPL loop
    for (;;) {
        if (pyexec_mode_kind == PYEXEC_MODE_RAW_REPL) {
            if (pyexec_raw_repl() != 0) {
                break;
            }
        } else {
            if (pyexec_friendly_repl() != 0) {
                break;
            }
        }
    }

    printf("PYB: soft reboot\n");
    mp_deinit();
    goto soft_reset;
}

void gc_collect(void) {
    // TODO possibly need to trace registers
    void *dummy;
    gc_collect_start();
    // Node: stack is ascending
    gc_collect_root(&dummy, ((mp_uint_t)&dummy - (mp_uint_t)MP_STATE_THREAD(stack_top)) / sizeof(mp_uint_t));
    gc_collect_end();
}

mp_lexer_t *mp_lexer_new_from_file(const char *filename) {
    mp_raise_OSError(MP_ENOENT);
}

mp_import_stat_t mp_import_stat(const char *path) {
    return MP_IMPORT_STAT_NO_EXIST;
}

mp_obj_t mp_builtin_open(size_t n_args, const mp_obj_t *args, mp_map_t *kwargs) {
    return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(mp_builtin_open_obj, 1, mp_builtin_open);

void nlr_jump_fail(void *val) {
    while (1);
}

void NORETURN __fatal_error(const char *msg) {
    while (1);
}

#ifndef NDEBUG
void MP_WEAK __assert_func(const char *file, int line, const char *func, const char *expr) {
    printf("Assertion '%s' failed, at file %s:%d\n", expr, file, line);
    __fatal_error("Assertion failed");
}
#endif