esp-idf/examples/storage/partition_api/partition_mmap
Kevin (Lao Kaiyao) 432864e917 Merge branch 'ci/enable_c5_mp_ci_jobs' into 'master'
ci(esp32c5mp): enable esp32c5 build on CI

See merge request espressif/esp-idf!29895
2024-04-08 12:16:16 +08:00
..
main partition: use esp_partition_munmap instead of spi_flash_munmap 2022-11-09 20:15:17 +08:00
CMakeLists.txt tools: Increase the minimal supported CMake version to 3.16 2022-06-01 06:35:02 +00:00
partitions_example.csv global: update note in the partition tables 2019-07-27 10:28:16 +02:00
pytest_partition_mmap_example.py ci: fix pytest generic env markers 2024-04-03 18:10:43 +08:00
README.md ci(esp32c5mp): disable the unsupported tests 2024-04-07 12:13:29 +08:00
sdkconfig.ci example_tests: Deletes usage esp32c3 ECO0 in CI (by default ECO3) 2021-09-24 13:55:07 +08:00
sdkconfig.defaults examples: remove non-existent options from sdkconfig.defaults 2019-07-29 04:57:38 +02:00

Supported Targets ESP32 ESP32-C2 ESP32-C3 ESP32-C5 ESP32-C6 ESP32-H2 ESP32-P4 ESP32-S2 ESP32-S3

Partition Memory Map Example

This example demonstrates how to use esp_partition_mmap to configure MMU and map a partition into memory address space for read operations.

Example Flow

The example uses a custom partition table, with a data partition storage used for demonstration. Before mapping this partition to memory, data is written to the partition used for verification.

The partition API function esp_partition_mmap is used to get a pointer to the mapped memory region and a handle to the mapping. The pointer is used to transparently read back the verification data written previously. Once the data written and read are verified to be the same, the function spi_flash_munmap is used to release the mapping.

Output

I (309) example: Written sample data to partition: ESP-IDF Partition Memory Map Example
I (309) example: Mapped partition to data memory address 0x3f410000
I (319) example: Read sample data from partition using mapped memory: ESP-IDF Partition Memory Map Example
I (329) example: Data matches
I (329) example: Unmapped partition from data memory
I (339) example: Example end

Others

Detailed functional description of partition API is provided in documentation.

See the README.md file in the upper level 'examples' directory for more information about examples.