7e14680a83
This commit adds a new `RingIO` type which exposes the internal ring-buffer code for general use in Python programs. It has the stream interface making it similar to `StringIO` and `BytesIO`, except `RingIO` has a fixed buffer size and is automatically safe when reads and writes are in different threads or an IRQ. This new type is enabled at the "extra features" ROM level. Signed-off-by: Andrew Leech <andrew.leech@planetinnovation.com.au>
49 lines
739 B
Python
49 lines
739 B
Python
# Check that micropython.RingIO works correctly.
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import micropython
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try:
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micropython.RingIO
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except AttributeError:
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print("SKIP")
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raise SystemExit
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rb = micropython.RingIO(16)
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print(rb)
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print(rb.any())
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rb.write(b"\x00")
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print(rb.any())
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rb.write(b"\x00")
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print(rb.any())
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print(rb.read(2))
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print(rb.any())
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rb.write(b"\x00\x01")
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print(rb.read())
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print(rb.read(1))
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# Try to write more data than can fit at one go.
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print(rb.write(b"\x00\x01" * 10))
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print(rb.write(b"\x00"))
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print(rb.read())
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ba = bytearray(17)
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rb = micropython.RingIO(ba)
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print(rb)
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print(rb.write(b"\x00\x01" * 10))
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print(rb.write(b"\x00"))
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print(rb.read())
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try:
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# Size must be int.
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micropython.RingIO(None)
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except TypeError as ex:
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print(ex)
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