2023-10-23 19:21:37 +02:00
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=======================
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2023-10-21 12:24:43 +02:00
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``can`` CAN Device Test
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=======================
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If the CAN device is configured in loopback mode, then this example can be used
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to test the CAN device in loop back mode. It simple sinces a sequence of CAN
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messages and verifies that those messages are returned exactly as sent.
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This test depends on these specific CAN/NSH configurations settings (your
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specific CAN settings might require additional settings).
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- ``CONFIG_CAN`` – Enables CAN support.
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- ``CONFIG_CAN_LOOPBACK`` – A CAN driver may or may not support a loopback mode
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for testing. The STM32 CAN driver does support loopback mode.
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- ``CONFIG_NSH_BUILTIN_APPS`` – Build the CAN test as an NSH built-in function.
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Default: Built as a standalone program.
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Specific configuration options for this example include:
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- ``CONFIG_EXAMPLES_CAN_DEVPATH`` – The path to the CAN device. Default:
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``/dev/can0``.
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- ``CONFIG_EXAMPLES_CAN_NMSGS`` – This number of CAN message is collected and the
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program terminates. Default: messages are sent and received indefinitely.
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The default behavior assumes loopback mode. Messages are sent, then read and
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verified. The behavior can be altered for other kinds of testing where the test
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only sends or received (but does not verify) can messages.
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- ``CONFIG_EXAMPLES_CAN_READONLY`` – Only receive messages.
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- ``CONFIG_EXAMPLES_CAN_WRITEONLY`` – Only send messages.
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