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33 lines
961 B
Python
33 lines
961 B
Python
# This work is licensed under the MIT license.
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# Copyright (c) 2013-2024 OpenMV LLC. All rights reserved.
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# https://github.com/openmv/openmv/blob/master/LICENSE
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#
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# CAN Shield Example
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#
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# This example demonstrates CAN communications between two cameras.
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# NOTE: you need two CAN transceiver shields and DB9 cable to run this example.
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import time
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from machine import CAN
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# NOTE: Set to False on receiving node.
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TRANSMITTER = True
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can = CAN(0, CAN.NORMAL, baudrate=1000000, auto_restart=True)
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if TRANSMITTER:
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while True:
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# Send message with id 1
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can.send("Hello", 1, timeout=100, extframe=False)
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time.sleep_ms(1000)
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else:
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# Runs on the receiving node.
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# Set a filter to receive messages with id=1 and 2
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# Filter index, mode (DUAL, etc..), FIFO (0), params
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can.setfilter(0, CAN.DUAL, 0, [1, 2])
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while True:
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# Receive messages on FIFO 0 (there's only one fifo)
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print(can.recv(0, timeout=10000))
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