d7fa288a6c
Added: read, write operations for the common and custom efuse tables. Writing is possible only for CONFIG_EFUSE_VIRTUAL. Closes: IDF-773
156 lines
5.6 KiB
C
156 lines
5.6 KiB
C
/* efuse example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include <stdio.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_err.h"
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#include "esp_log.h"
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#include "esp_efuse.h"
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#include "esp_efuse_table.h"
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#include "esp_efuse_custom_table.h"
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#include "sdkconfig.h"
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static const char* TAG = "example";
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typedef struct {
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uint8_t module_version; /*!< Module version: length 8 bits */
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uint8_t device_role; /*!< Device role: length 3 bits */
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uint8_t setting_1; /*!< Setting 1: length 6 bits */
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uint8_t setting_2; /*!< Setting 2: length 5 bits */
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size_t custom_secure_version; /*!< Custom secure version: length 16 bits */
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uint16_t reserv; /*!< Reserv */
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} device_desc_t;
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static void print_device_desc(device_desc_t *desc)
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{
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ESP_LOGI(TAG, "module_version = %d", desc->module_version);
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if (desc->device_role == 0) {
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ESP_LOGI(TAG, "device_role = None");
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} else if (desc->device_role == 1) {
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ESP_LOGI(TAG, "device_role = Master");
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} else if (desc->device_role == 2) {
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ESP_LOGI(TAG, "device_role = Slave");
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} else {
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ESP_LOGI(TAG, "device_role = Not supported");
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}
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ESP_LOGI(TAG, "setting_1 = %d", desc->setting_1);
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ESP_LOGI(TAG, "setting_2 = %d", desc->setting_2);
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ESP_LOGI(TAG, "custom_secure_version = %d", desc->custom_secure_version);
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}
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static void read_device_desc_efuse_fields(device_desc_t *desc)
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{
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ESP_ERROR_CHECK(esp_efuse_read_field_blob(ESP_EFUSE_MODULE_VERSION, &desc->module_version, 8));
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ESP_ERROR_CHECK(esp_efuse_read_field_blob(ESP_EFUSE_DEVICE_ROLE, &desc->device_role, 3));
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ESP_ERROR_CHECK(esp_efuse_read_field_blob(ESP_EFUSE_SETTING_1, &desc->setting_1, 6));
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ESP_ERROR_CHECK(esp_efuse_read_field_blob(ESP_EFUSE_SETTING_2, &desc->setting_2, 5));
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ESP_ERROR_CHECK(esp_efuse_read_field_cnt(ESP_EFUSE_CUSTOM_SECURE_VERSION, &desc->custom_secure_version));
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print_device_desc(desc);
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}
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static void read_efuse_fields(device_desc_t *desc)
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{
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ESP_LOGI(TAG, "read efuse fields");
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uint8_t mac[6];
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ESP_ERROR_CHECK(esp_efuse_read_field_blob(ESP_EFUSE_MAC_FACTORY, &mac, sizeof(mac) * 8));
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ESP_LOGI(TAG, "1. read MAC address: %02x:%02x:%02x:%02x:%02x:%02x", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
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size_t secure_version = 0;
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ESP_ERROR_CHECK(esp_efuse_read_field_cnt(ESP_EFUSE_SECURE_VERSION, &secure_version));
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ESP_LOGI(TAG, "2. read secure_version: %d", secure_version);
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ESP_LOGI(TAG, "3. read custom fields");
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read_device_desc_efuse_fields(desc);
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}
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static void write_efuse_fields(device_desc_t *desc, esp_efuse_coding_scheme_t coding_scheme)
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{
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#ifdef CONFIG_EFUSE_VIRTUAL
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#if CONFIG_IDF_TARGET_ESP32
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const esp_efuse_coding_scheme_t coding_scheme_for_batch_mode = EFUSE_CODING_SCHEME_3_4;
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#else
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const esp_efuse_coding_scheme_t coding_scheme_for_batch_mode = EFUSE_CODING_SCHEME_RS;
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#endif
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ESP_LOGI(TAG, "write custom efuse fields");
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if (coding_scheme == coding_scheme_for_batch_mode) {
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ESP_LOGI(TAG, "In the case of 3/4 or RS coding scheme, you cannot write efuse fields separately");
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ESP_LOGI(TAG, "You should use the batch mode of writing fields for this");
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ESP_ERROR_CHECK(esp_efuse_batch_write_begin());
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}
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ESP_ERROR_CHECK(esp_efuse_write_field_blob(ESP_EFUSE_MODULE_VERSION, &desc->module_version, 8));
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ESP_ERROR_CHECK(esp_efuse_write_field_blob(ESP_EFUSE_DEVICE_ROLE, &desc->device_role, 3));
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ESP_ERROR_CHECK(esp_efuse_write_field_blob(ESP_EFUSE_SETTING_1, &desc->setting_1, 6));
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ESP_ERROR_CHECK(esp_efuse_write_field_blob(ESP_EFUSE_SETTING_2, &desc->setting_2, 5));
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ESP_ERROR_CHECK(esp_efuse_write_field_cnt(ESP_EFUSE_CUSTOM_SECURE_VERSION, desc->custom_secure_version));
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if (coding_scheme == coding_scheme_for_batch_mode) {
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ESP_ERROR_CHECK(esp_efuse_batch_write_commit());
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}
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#endif // CONFIG_EFUSE_VIRTUAL
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}
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static esp_efuse_coding_scheme_t get_coding_scheme(void)
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{
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// The coding scheme is used for EFUSE_BLK1, EFUSE_BLK2 and EFUSE_BLK3.
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// We use EFUSE_BLK3 (custom block) to verify it.
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esp_efuse_coding_scheme_t coding_scheme = esp_efuse_get_coding_scheme(EFUSE_BLK3);
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if (coding_scheme == EFUSE_CODING_SCHEME_NONE) {
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ESP_LOGI(TAG, "Coding Scheme NONE");
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#if CONFIG_IDF_TARGET_ESP32
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} else if (coding_scheme == EFUSE_CODING_SCHEME_3_4) {
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ESP_LOGI(TAG, "Coding Scheme 3/4");
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} else {
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ESP_LOGI(TAG, "Coding Scheme REPEAT");
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}
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#else
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} else if (coding_scheme == EFUSE_CODING_SCHEME_RS) {
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ESP_LOGI(TAG, "Coding Scheme RS (Reed-Solomon coding)");
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}
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#endif
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return coding_scheme;
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}
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void app_main(void)
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{
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esp_efuse_coding_scheme_t coding_scheme = get_coding_scheme();
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device_desc_t device_desc = { 0 };
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read_efuse_fields(&device_desc);
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ESP_LOGW(TAG, "This example does not burn any efuse in reality only virtually");
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#ifdef CONFIG_EFUSE_VIRTUAL
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ESP_LOGW(TAG, "Write operations in efuse fields are performed virtually");
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if (device_desc.device_role == 0) {
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device_desc.module_version = 1;
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device_desc.device_role = 2;
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device_desc.setting_1 = 3;
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device_desc.setting_2 = 4;
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device_desc.custom_secure_version = 5;
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write_efuse_fields(&device_desc, coding_scheme);
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read_device_desc_efuse_fields(&device_desc);
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}
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#else
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ESP_LOGW(TAG, "The part of the code that writes efuse fields is disabled");
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#endif
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ESP_LOGI(TAG, "Done");
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}
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