OVMS3-idf/components/bootloader_support/include/bootloader_common.h

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// Copyright 2018 Espressif Systems (Shanghai) PTE 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.
#pragma once
#include "esp_flash_data_types.h"
/// Type of hold a GPIO in low state
typedef enum {
GPIO_LONG_HOLD = 1, /*!< The long hold GPIO */
GPIO_SHORT_HOLD = -1, /*!< The short hold GPIO */
GPIO_NOT_HOLD = 0 /*!< If the GPIO input is not low */
} esp_comm_gpio_hold_t;
/**
* @brief Calculate crc for the OTA data partition.
*
* @param[in] ota_data The OTA data partition.
* @return Returns crc value.
*/
uint32_t bootloader_common_ota_select_crc(const esp_ota_select_entry_t *s);
/**
* @brief Verifies the validity of the OTA data partition
*
* @param[in] ota_data The OTA data partition.
* @return Returns true on valid, false otherwise.
*/
bool bootloader_common_ota_select_valid(const esp_ota_select_entry_t *s);
/**
* @brief Check if the GPIO input is a long hold or a short hold.
*
* Number of the GPIO input will be configured as an input with internal pull-up enabled.
* If the GPIO input is held low continuously for delay_sec period then it is a long hold.
* If the GPIO input is held low for less period then it is a short hold.
*
* @param[in] num_pin Number of the GPIO input.
* @param[in] delay_sec Input must be driven low for at least this long, continuously.
* @return esp_comm_gpio_hold_t Defines type of hold a GPIO in low state.
*/
esp_comm_gpio_hold_t bootloader_common_check_long_hold_gpio(uint32_t num_pin, uint32_t delay_sec);
/**
* @brief Erase the partition data that is specified in the transferred list.
*
* @param[in] list_erase String containing a list of cleared partitions. Like this "nvs, phy". The string must be null-terminal.
* @param[in] ota_data_erase If true then the OTA data partition will be cleared (if there is it in partition table).
* @return Returns true on success, false otherwise.
*/
bool bootloader_common_erase_part_type_data(const char *list_erase, bool ota_data_erase);
/**
* @brief Determines if the list contains the label
*
* @param[in] list A string of names delimited by commas or spaces. Like this "nvs, phy, data". The string must be null-terminated.
* @param[in] label The substring that will be searched in the list.
* @return Returns true if the list contains the label, false otherwise.
*/
bool bootloader_common_label_search(const char *list, char *label);
/**
* @brief Calculates a sha-256 for a given partition or returns a appended digest.
*
* This function can be used to return the SHA-256 digest of application, bootloader and data partitions.
* For apps with SHA-256 appended to the app image, the result is the appended SHA-256 value for the app image content.
* The hash is verified before returning, if app content is invalid then the function returns ESP_ERR_IMAGE_INVALID.
* For apps without SHA-256 appended to the image, the result is the SHA-256 of all bytes in the app image.
* For other partition types, the result is the SHA-256 of the entire partition.
*
* @param[in] address Address of partition.
* @param[in] size Size of partition.
* @param[in] type Type of partition. For applications the type is 0, otherwise type is data.
* @param[out] out_sha_256 Returned SHA-256 digest for a given partition.
*
* @return
* - ESP_OK: In case of successful operation.
* - ESP_ERR_INVALID_ARG: The size was 0 or the sha_256 was NULL.
* - ESP_ERR_NO_MEM: Cannot allocate memory for sha256 operation.
* - ESP_ERR_IMAGE_INVALID: App partition doesn't contain a valid app image.
* - ESP_FAIL: An allocation error occurred.
*/
esp_err_t bootloader_common_get_sha256_of_partition(uint32_t address, uint32_t size, int type, uint8_t *out_sha_256);