esp_init_data.c

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2016 Paul Sokolovsky
 *
 * 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 <stdio.h>
#include "ets_sys.h"
#include "etshal.h"
#include "esp_mphal.h"
#include "user_interface.h"
#include "extmod/misc.h"

NORETURN void call_user_start(void);
void ets_printf(const char *fmt, ...);
extern char flashchip;

static const uint8_t default_init_data[] __attribute__((aligned(4))) = {
    0x05, 0x00, 0x04, 0x02, 0x05, 0x05, 0x05, 0x02, 0x05, 0x00, 0x04, 0x05, 0x05, 0x04, 0x05, 0x05,
    0x04, 0xfe, 0xfd, 0xff, 0xf0, 0xf0, 0xf0, 0xe0, 0xe0, 0xe0, 0xe1, 0x0a, 0xff, 0xff, 0xf8, 0x00,
    0xf8, 0xf8, 0x52, 0x4e, 0x4a, 0x44, 0x40, 0x38, 0x00, 0x00, 0x01, 0x01, 0x02, 0x03, 0x04, 0x05,
    0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0xe1, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x93, 0x43, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

void firmware_start(void) {
    // For SDK 1.5.2, either address has shifted and not mirrored in
    // eagle.rom.addr.v6.ld, or extra initial member was added.
    SpiFlashChip *flash = (SpiFlashChip *)(&flashchip + 4);

    char buf[128];
    SPIRead(flash->chip_size - 4 * 0x1000, buf, sizeof(buf));
    /*for (int i = 0; i < sizeof(buf); i++) {
        static char hexf[] = "%x ";
        ets_printf(hexf, buf[i]);
    }*/

    bool inited = false;
    for (int i = 0; i < sizeof(buf); i++) {
        if (buf[i] != 0xff) {
            inited = true;
            break;
        }
    }

    if (!inited) {
        static char msg[] = "Writing init data\n";
        ets_printf(msg);
        SPIRead((uint32_t)&default_init_data - 0x40200000, buf, sizeof(buf));
        SPIWrite(flash->chip_size - 4 * 0x1000, buf, sizeof(buf));
    }

    asm ("j call_user_start");
}