1 // Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
7 // http://www.apache.org/licenses/LICENSE-2.0
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
15 #ifndef __ESP_PARTITION_H__
16 #define __ESP_PARTITION_H__
22 #include "esp_spi_flash.h"
29 * @file esp_partition.h
30 * @brief Partition APIs
35 * @brief Partition type
36 * @note Keep this enum in sync with PartitionDefinition class gen_esp32part.py
39 ESP_PARTITION_TYPE_APP = 0x00, //!< Application partition type
40 ESP_PARTITION_TYPE_DATA = 0x01, //!< Data partition type
41 } esp_partition_type_t;
44 * @brief Partition subtype
45 * @note Keep this enum in sync with PartitionDefinition class gen_esp32part.py
48 ESP_PARTITION_SUBTYPE_APP_FACTORY = 0x00, //!< Factory application partition
49 ESP_PARTITION_SUBTYPE_APP_OTA_MIN = 0x10, //!< Base for OTA partition subtypes
50 ESP_PARTITION_SUBTYPE_APP_OTA_0 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 0, //!< OTA partition 0
51 ESP_PARTITION_SUBTYPE_APP_OTA_1 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 1, //!< OTA partition 1
52 ESP_PARTITION_SUBTYPE_APP_OTA_2 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 2, //!< OTA partition 2
53 ESP_PARTITION_SUBTYPE_APP_OTA_3 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 3, //!< OTA partition 3
54 ESP_PARTITION_SUBTYPE_APP_OTA_4 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 4, //!< OTA partition 4
55 ESP_PARTITION_SUBTYPE_APP_OTA_5 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 5, //!< OTA partition 5
56 ESP_PARTITION_SUBTYPE_APP_OTA_6 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 6, //!< OTA partition 6
57 ESP_PARTITION_SUBTYPE_APP_OTA_7 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 7, //!< OTA partition 7
58 ESP_PARTITION_SUBTYPE_APP_OTA_8 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 8, //!< OTA partition 8
59 ESP_PARTITION_SUBTYPE_APP_OTA_9 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 9, //!< OTA partition 9
60 ESP_PARTITION_SUBTYPE_APP_OTA_10 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 10,//!< OTA partition 10
61 ESP_PARTITION_SUBTYPE_APP_OTA_11 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 11,//!< OTA partition 11
62 ESP_PARTITION_SUBTYPE_APP_OTA_12 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 12,//!< OTA partition 12
63 ESP_PARTITION_SUBTYPE_APP_OTA_13 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 13,//!< OTA partition 13
64 ESP_PARTITION_SUBTYPE_APP_OTA_14 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 14,//!< OTA partition 14
65 ESP_PARTITION_SUBTYPE_APP_OTA_15 = ESP_PARTITION_SUBTYPE_APP_OTA_MIN + 15,//!< OTA partition 15
66 ESP_PARTITION_SUBTYPE_APP_OTA_MAX = 15, //!< Max subtype of OTA partition
67 ESP_PARTITION_SUBTYPE_APP_TEST = 0x20, //!< Test application partition
69 ESP_PARTITION_SUBTYPE_DATA_OTA = 0x00, //!< OTA selection partition
70 ESP_PARTITION_SUBTYPE_DATA_PHY = 0x01, //!< PHY init data partition
71 ESP_PARTITION_SUBTYPE_DATA_NVS = 0x02, //!< NVS partition
73 ESP_PARTITION_SUBTYPE_DATA_ESPHTTPD = 0x80, //!< ESPHTTPD partition
74 ESP_PARTITION_SUBTYPE_DATA_FAT = 0x81, //!< FAT partition
75 ESP_PARTITION_SUBTYPE_DATA_SPIFFS = 0x82, //!< SPIFFS partition
77 ESP_PARTITION_SUBTYPE_ANY = 0xff, //!< Used to search for partitions with any subtype
78 } esp_partition_subtype_t;
81 * @brief Convenience macro to get esp_partition_subtype_t value for the i-th OTA partition
83 #define ESP_PARTITION_SUBTYPE_OTA(i) ((esp_partition_subtype_t)(ESP_PARTITION_SUBTYPE_APP_OTA_MIN + ((i) & 0xf)))
86 * @brief Opaque partition iterator type
88 typedef struct esp_partition_iterator_opaque_* esp_partition_iterator_t;
91 * @brief partition information structure
93 * This is not the format in flash, that format is esp_partition_info_t.
95 * However, this is the format used by this API.
98 esp_partition_type_t type; /*!< partition type (app/data) */
99 esp_partition_subtype_t subtype; /*!< partition subtype */
100 uint32_t address; /*!< starting address of the partition in flash */
101 uint32_t size; /*!< size of the partition, in bytes */
102 char label[17]; /*!< partition label, zero-terminated ASCII string */
103 bool encrypted; /*!< flag is set to true if partition is encrypted */
107 * @brief Find partition based on one or more parameters
109 * @param type Partition type, one of esp_partition_type_t values
110 * @param subtype Partition subtype, one of esp_partition_subtype_t values.
111 * To find all partitions of given type, use
112 * ESP_PARTITION_SUBTYPE_ANY.
113 * @param label (optional) Partition label. Set this value if looking
114 * for partition with a specific name. Pass NULL otherwise.
116 * @return iterator which can be used to enumerate all the partitions found,
117 * or NULL if no partitions were found.
118 * Iterator obtained through this function has to be released
119 * using esp_partition_iterator_release when not used any more.
121 esp_partition_iterator_t esp_partition_find(esp_partition_type_t type, esp_partition_subtype_t subtype, const char* label);
124 * @brief Find first partition based on one or more parameters
126 * @param type Partition type, one of esp_partition_type_t values
127 * @param subtype Partition subtype, one of esp_partition_subtype_t values.
128 * To find all partitions of given type, use
129 * ESP_PARTITION_SUBTYPE_ANY.
130 * @param label (optional) Partition label. Set this value if looking
131 * for partition with a specific name. Pass NULL otherwise.
133 * @return pointer to esp_partition_t structure, or NULL if no partition is found.
134 * This pointer is valid for the lifetime of the application.
136 const esp_partition_t* esp_partition_find_first(esp_partition_type_t type, esp_partition_subtype_t subtype, const char* label);
139 * @brief Get esp_partition_t structure for given partition
141 * @param iterator Iterator obtained using esp_partition_find. Must be non-NULL.
143 * @return pointer to esp_partition_t structure. This pointer is valid for the lifetime
144 * of the application.
146 const esp_partition_t* esp_partition_get(esp_partition_iterator_t iterator);
149 * @brief Move partition iterator to the next partition found
151 * Any copies of the iterator will be invalid after this call.
153 * @param iterator Iterator obtained using esp_partition_find. Must be non-NULL.
155 * @return NULL if no partition was found, valid esp_partition_iterator_t otherwise.
157 esp_partition_iterator_t esp_partition_next(esp_partition_iterator_t iterator);
160 * @brief Release partition iterator
162 * @param iterator Iterator obtained using esp_partition_find. Must be non-NULL.
165 void esp_partition_iterator_release(esp_partition_iterator_t iterator);
168 * @brief Read data from the partition
170 * @param partition Pointer to partition structure obtained using
171 * esp_partition_find_first or esp_partition_get.
173 * @param dst Pointer to the buffer where data should be stored.
174 * Pointer must be non-NULL and buffer must be at least 'size' bytes long.
175 * @param src_offset Address of the data to be read, relative to the
176 * beginning of the partition.
177 * @param size Size of data to be read, in bytes.
179 * @return ESP_OK, if data was read successfully;
180 * ESP_ERR_INVALID_ARG, if src_offset exceeds partition size;
181 * ESP_ERR_INVALID_SIZE, if read would go out of bounds of the partition;
182 * or one of error codes from lower-level flash driver.
184 esp_err_t esp_partition_read(const esp_partition_t* partition,
185 size_t src_offset, void* dst, size_t size);
188 * @brief Write data to the partition
190 * Before writing data to flash, corresponding region of flash needs to be erased.
191 * This can be done using esp_partition_erase_range function.
193 * @param partition Pointer to partition structure obtained using
194 * esp_partition_find_first or esp_partition_get.
196 * @param dst_offset Address where the data should be written, relative to the
197 * beginning of the partition.
198 * @param src Pointer to the source buffer. Pointer must be non-NULL and
199 * buffer must be at least 'size' bytes long.
200 * @param size Size of data to be written, in bytes.
202 * @note Prior to writing to flash memory, make sure it has been erased with
203 * esp_partition_erase_range call.
205 * @return ESP_OK, if data was written successfully;
206 * ESP_ERR_INVALID_ARG, if dst_offset exceeds partition size;
207 * ESP_ERR_INVALID_SIZE, if write would go out of bounds of the partition;
208 * or one of error codes from lower-level flash driver.
210 esp_err_t esp_partition_write(const esp_partition_t* partition,
211 size_t dst_offset, const void* src, size_t size);
214 * @brief Erase part of the partition
216 * @param partition Pointer to partition structure obtained using
217 * esp_partition_find_first or esp_partition_get.
219 * @param start_addr Address where erase operation should start. Must be aligned
221 * @param size Size of the range which should be erased, in bytes.
222 * Must be divisible by 4 kilobytes.
224 * @return ESP_OK, if the range was erased successfully;
225 * ESP_ERR_INVALID_ARG, if iterator or dst are NULL;
226 * ESP_ERR_INVALID_SIZE, if erase would go out of bounds of the partition;
227 * or one of error codes from lower-level flash driver.
229 esp_err_t esp_partition_erase_range(const esp_partition_t* partition,
230 uint32_t start_addr, uint32_t size);
233 * @brief Configure MMU to map partition into data memory
235 * Unlike spi_flash_mmap function, which requires a 64kB aligned base address,
236 * this function doesn't impose such a requirement.
237 * If offset results in a flash address which is not aligned to 64kB boundary,
238 * address will be rounded to the lower 64kB boundary, so that mapped region
239 * includes requested range.
240 * Pointer returned via out_ptr argument will be adjusted to point to the
241 * requested offset (not necessarily to the beginning of mmap-ed region).
243 * To release mapped memory, pass handle returned via out_handle argument to
244 * spi_flash_munmap function.
246 * @param partition Pointer to partition structure obtained using
247 * esp_partition_find_first or esp_partition_get.
249 * @param offset Offset from the beginning of partition where mapping should start.
250 * @param size Size of the area to be mapped.
251 * @param memory Memory space where the region should be mapped
252 * @param out_ptr Output, pointer to the mapped memory region
253 * @param out_handle Output, handle which should be used for spi_flash_munmap call
255 * @return ESP_OK, if successful
257 esp_err_t esp_partition_mmap(const esp_partition_t* partition, uint32_t offset, uint32_t size,
258 spi_flash_mmap_memory_t memory,
259 const void** out_ptr, spi_flash_mmap_handle_t* out_handle);
267 #endif /* __ESP_PARTITION_H__ */