facab8c5a7
This updates the minimal supported version of CMake to 3.16, which in turn enables us to use more CMake features and have a cleaner build system. This is the version that provides most new features and also the one we use in our latest docker image for CI. |
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| .. | ||
| main | ||
| CMakeLists.txt | ||
| partition_mmap_example_test.py | ||
| partitions_example.csv | ||
| README.md | ||
| sdkconfig.ci | ||
| sdkconfig.defaults | ||
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.