Andrew Leech 7e14680a83 py/objringio: Add micropython.RingIO() interface for general use.
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>
2024-09-19 18:00:44 +10:00

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<RingIO>
0
1
2
b'\x00\x00'
0
b'\x00\x01'
b''
16
0
b'\x00\x01\x00\x01\x00\x01\x00\x01\x00\x01\x00\x01\x00\x01\x00\x01'
<RingIO>
16
0
b'\x00\x01\x00\x01\x00\x01\x00\x01\x00\x01\x00\x01\x00\x01\x00\x01'
can't convert NoneType to int