firmware/lib/MorseWlan/src/mmhal_wlan_binaries.c

#ifdef USE_MM_IOT_ESP32
/*
 * Copyright 2021-2023 Morse Micro
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include "mmhal_wlan.h"
#include "mmosal.h"

/*
 * ---------------------------------------------------------------------------------------------
 *                                      BCF Retrieval
 * ---------------------------------------------------------------------------------------------
 */

/*
 * The following implementation reads the BCF File from the config store.
 */

void mmhal_wlan_read_bcf_file(uint32_t offset, uint32_t requested_len, struct mmhal_robuf *robuf)
{
    /** Points to the start of the BCF binary image. Defined as part of the Makefile */
    extern uint8_t bcf_binary_start;
    /** Points to the end of the BCF binary image. Defined as part of the Makefile */
    extern uint8_t bcf_binary_end;

    size_t bcf_len = &bcf_binary_end - &bcf_binary_start;

    /* Initialise robuf */
    robuf->buf = NULL;
    robuf->len = 0;
    robuf->free_arg = NULL;
    robuf->free_cb = NULL;

    /* Sanity check */
    if (bcf_len < offset) {
        printf("Detected an attempt to start reading off the end of the bcf file.\n");
        return;
    }

    robuf->buf = (uint8_t *)&bcf_binary_start + offset;
    robuf->len = bcf_len - offset;
    robuf->len = (robuf->len < requested_len) ? robuf->len : requested_len;
}

/*
 * ---------------------------------------------------------------------------------------------
 *                                    Firmware Retrieval
 * ---------------------------------------------------------------------------------------------
 */
/** Points to the start of the firmware binary image. Defined as part of the Makefile */
extern uint8_t firmware_binary_start;
/** Points to the end of the firmware binary image. Defined as part of the Makefile */
extern uint8_t firmware_binary_end;

void mmhal_wlan_read_fw_file(uint32_t offset, uint32_t requested_len, struct mmhal_robuf *robuf)
{
    uint32_t firmware_len = &firmware_binary_end - &firmware_binary_start;
    if (offset > firmware_len) {
        printf("Detected an attempt to start read off the end of the firmware file.\n");
        robuf->buf = NULL;
        return;
    }

    robuf->buf = (&firmware_binary_start + offset);
    firmware_len -= offset;

    robuf->len = (firmware_len < requested_len) ? firmware_len : requested_len;
}

#endif /* USE_MM_IOT_ESP32 */