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69 lines
2.4 KiB
Markdown
69 lines
2.4 KiB
Markdown
# Partitions Tool Example
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This example demonstrates common operations the partitions tool [parttool.py](../../../components/partition_table/parttool.py) allows the user to perform:
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- reading, writing and erasing partitions,
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- retrieving info on a certain partition,
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- dumping the entire partition table, and
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- generating a blank partition file.
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Users taking a look at this example should focus on the contents of the python script [parttool_example.py](parttool_example.py). The script contains programmatic invocations of [parttool.py](../../../components/partition_table/parttool.py) in Python for the operations mentioned above; and can serve as a guide for users wanting to do the same in their applications.
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The example performs the operations mentioned above in a straightforward manner: it performs writes to partitions and then verifies correct content
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by reading it back. For partitions, contents are compared to the originally written file. For the partition table, contents are verified against the partition table CSV
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file. An erased partition's contents is compared to a generated blank file.
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## How to use example
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### Build and Flash
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Before running the example script [parttool_example.py](parttool_example.py), it is necessary to build and flash the firmware using the usual means:
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```bash
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# If using Make
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make build flash
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# If using CMake
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idf.py build flash
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```
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### Running [parttool_example.py](parttool_example.py)
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The example can be executed by running the script [parttool_example.py](parttool_example.py). Either run it directly using
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```bash
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./parttool_example.py
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```
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or run it using
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```bash
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python parttool_example.py
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```
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The script searches for valid target devices connected to the host and performs the operations on the first one it finds. To perform the operations on a specific device, specify the port it is attached to during script invocation:
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```bash
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# The target device is attached to /dev/ttyUSB2, for example
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python parttool_example.py --port /dev/ttyUSB2
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```
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## Example output
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Running the script produces the following output:
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```
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Checking if device app binary matches built binary
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Checking if device partition table matches partition table csv
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Retrieving data partition offset and size
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Found data partition at offset 0x110000 with size 0x10000
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Writing to data partition
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Reading data partition
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Erasing data partition
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Generating blank data partition file
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Reading data partition
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Partition tool operations performed successfully!
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```
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