esp-idf/components/esp_rom/linux/esp_rom_efuse.c

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// Copyright 2021 Espressif Systems (Shanghai) CO LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "esp_rom_efuse.h"
static uint8_t esp_crc8(uint8_t const * p, uint32_t len)
{
unsigned char i = 0;
unsigned char crc = 0;
while (len--) {
crc = crc ^ (*p++);
for (i = 0; i < 8; i++) {
if ((crc) & 0x01) {
crc = (crc >> 1) ^ (0x8c) ;
} else {
crc = crc >> 1;
}
}
}
return (crc);
}
uint8_t esp_rom_efuse_mac_address_crc8(const uint8_t *data, uint32_t len)
{
return esp_crc8(data, len);
}
uint32_t esp_rom_efuse_get_flash_gpio_info(void)
{
return 0;
}
uint32_t esp_rom_efuse_get_flash_wp_gpio(void)
{
return 0;
}
bool esp_rom_efuse_is_secure_boot_enabled(void)
{
return false;
}