168 lines
7.5 KiB
C
Executable file
168 lines
7.5 KiB
C
Executable file
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef _OTA_OPS_H
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#define _OTA_OPS_H
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#include <stdint.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include "esp_err.h"
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#include "esp_partition.h"
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#include "esp_spi_flash.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#define OTA_SIZE_UNKNOWN 0xffffffff /*!< Used for esp_ota_begin() if new image size is unknown */
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#define ESP_ERR_OTA_BASE 0x1500 /*!< Base error code for ota_ops api */
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#define ESP_ERR_OTA_PARTITION_CONFLICT (ESP_ERR_OTA_BASE + 0x01) /*!< Error if request was to write or erase the current running partition */
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#define ESP_ERR_OTA_SELECT_INFO_INVALID (ESP_ERR_OTA_BASE + 0x02) /*!< Error if OTA data partition contains invalid content */
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#define ESP_ERR_OTA_VALIDATE_FAILED (ESP_ERR_OTA_BASE + 0x03) /*!< Error if OTA app image is invalid */
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/**
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* @brief Opaque handle for an application OTA update
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*
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* esp_ota_begin() returns a handle which is then used for subsequent
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* calls to esp_ota_write() and esp_ota_end().
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*/
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typedef uint32_t esp_ota_handle_t;
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/**
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* @brief Commence an OTA update writing to the specified partition.
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* The specified partition is erased to the specified image size.
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*
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* If image size is not yet known, pass OTA_SIZE_UNKNOWN which will
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* cause the entire partition to be erased.
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*
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* On success, this function allocates memory that remains in use
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* until esp_ota_end() is called with the returned handle.
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*
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* @param partition Pointer to info for partition which will receive the OTA update. Required.
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* @param image_size Size of new OTA app image. Partition will be erased in order to receive this size of image. If 0 or OTA_SIZE_UNKNOWN, the entire partition is erased.
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* @param out_handle On success, returns a handle which should be used for subsequent esp_ota_write() and esp_ota_end() calls.
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* @return
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* - ESP_OK: OTA operation commenced successfully.
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* - ESP_ERR_INVALID_ARG: partition or out_handle arguments were NULL, or partition doesn't point to an OTA app partition.
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* - ESP_ERR_NO_MEM: Cannot allocate memory for OTA operation.
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* - ESP_ERR_OTA_PARTITION_CONFLICT: Partition holds the currently running firmware, cannot update in place.
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* - ESP_ERR_NOT_FOUND: Partition argument not found in partition table.
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* - ESP_ERR_OTA_SELECT_INFO_INVALID: The OTA data partition contains invalid data.
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* - ESP_ERR_INVALID_SIZE: Partition doesn't fit in configured flash size.
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* - ESP_ERR_FLASH_OP_TIMEOUT or ESP_ERR_FLASH_OP_FAIL: Flash write failed.
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*/
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esp_err_t esp_ota_begin(const esp_partition_t* partition, size_t image_size, esp_ota_handle_t* out_handle);
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/**
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* @brief Write OTA update data to partition
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*
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* This function can be called multiple times as
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* data is received during the OTA operation. Data is written
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* sequentially to the partition.
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*
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* @param handle Handle obtained from esp_ota_begin
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* @param data Data buffer to write
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* @param size Size of data buffer in bytes.
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*
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* @return
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* - ESP_OK: Data was written to flash successfully.
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* - ESP_ERR_INVALID_ARG: handle is invalid.
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* - ESP_ERR_OTA_VALIDATE_FAILED: First byte of image contains invalid app image magic byte.
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* - ESP_ERR_FLASH_OP_TIMEOUT or ESP_ERR_FLASH_OP_FAIL: Flash write failed.
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* - ESP_ERR_OTA_SELECT_INFO_INVALID: OTA data partition has invalid contents
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*/
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esp_err_t esp_ota_write(esp_ota_handle_t handle, const void* data, size_t size);
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/**
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* @brief Finish OTA update and validate newly written app image.
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*
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* @param handle Handle obtained from esp_ota_begin().
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*
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* @note After calling esp_ota_end(), the handle is no longer valid and any memory associated with it is freed (regardless of result).
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*
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* @return
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* - ESP_OK: Newly written OTA app image is valid.
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* - ESP_ERR_NOT_FOUND: OTA handle was not found.
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* - ESP_ERR_INVALID_ARG: Handle was never written to.
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* - ESP_ERR_OTA_VALIDATE_FAILED: OTA image is invalid (either not a valid app image, or - if secure boot is enabled - signature failed to verify.)
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* - ESP_ERR_INVALID_STATE: If flash encryption is enabled, this result indicates an internal error writing the final encrypted bytes to flash.
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*/
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esp_err_t esp_ota_end(esp_ota_handle_t handle);
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/**
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* @brief Configure OTA data for a new boot partition
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*
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* @note If this function returns ESP_OK, calling esp_restart() will boot the newly configured app partition.
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*
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* @param partition Pointer to info for partition containing app image to boot.
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*
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* @return
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* - ESP_OK: OTA data updated, next reboot will use specified partition.
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* - ESP_ERR_INVALID_ARG: partition argument was NULL or didn't point to a valid OTA partition of type "app".
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* - ESP_ERR_OTA_VALIDATE_FAILED: Partition contained invalid app image. Also returned if secure boot is enabled and signature validation failed.
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* - ESP_ERR_NOT_FOUND: OTA data partition not found.
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* - ESP_ERR_FLASH_OP_TIMEOUT or ESP_ERR_FLASH_OP_FAIL: Flash erase or write failed.
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*/
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esp_err_t esp_ota_set_boot_partition(const esp_partition_t* partition);
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/**
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* @brief Get partition info of currently configured boot app
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*
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* If esp_ota_set_boot_partition() has been called, the partition which was set by that function will be returned.
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*
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* If esp_ota_set_boot_partition() has not been called, the result is
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* equivalent to esp_ota_get_running_partition().
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*
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* @return Pointer to info for partition structure, or NULL if no partition is found or flash read operation failed. Returned pointer is valid for the lifetime of the application.
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*/
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const esp_partition_t* esp_ota_get_boot_partition(void);
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/**
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* @brief Get partition info of currently running app
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*
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* This function is different to esp_ota_get_boot_partition() in that
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* it ignores any change of selected boot partition caused by
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* esp_ota_set_boot_partition(). Only the app whose code is currently
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* running will have its partition information returned.
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*
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* @return Pointer to info for partition structure, or NULL if no partition is found or flash read operation failed. Returned pointer is valid for the lifetime of the application.
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*/
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const esp_partition_t* esp_ota_get_running_partition(void);
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/**
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* @brief Return the next OTA app partition which should be written with a new firmware.
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*
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* Call this function to find an OTA app partition which can be passed to esp_ota_begin().
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*
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* Finds next partition round-robin, starting from the current running partition.
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*
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* @param start_from If set, treat this partition info as describing the current running partition. Can be NULL, in which case esp_ota_get_running_partition() is used to find the currently running partition. The result of this function is never the same as this argument.
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*
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* @return Pointer to info for partition which should be updated next. NULL result indicates invalid OTA data partition, or that no eligible OTA app slot partition was found.
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*
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*/
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const esp_partition_t* esp_ota_get_next_update_partition(const esp_partition_t *start_from);
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#ifdef __cplusplus
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}
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#endif
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#endif /* OTA_OPS_H */
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