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docs/esp8266/quickref: Add note about physical vs logical pin numbers.

This commit is contained in:
Paul Sokolovsky 2016-04-05 16:29:52 +03:00
parent 2c8356c482
commit e4cb7c6158
1 changed files with 7 additions and 1 deletions
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8
docs/esp8266/quickref.rst
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@ -111,7 +111,13 @@ Use the ``machine.Pin`` class::
p4 = Pin(4, Pin.IN, Pin.PULL_UP) # enable internal pull-up resistor
p5 = Pin(5, Pin.OUT, value=1) # set pin high on creation
Available pins are: 0, 1, 2, 3, 4, 5, 12, 13, 14, 15, 16.
Available pins are: 0, 1, 2, 3, 4, 5, 12, 13, 14, 15, 16, which correspond
to the actual GPIO pin numbers of ESP8266 chip. Note that many end-user
boards use their own adhoc pin numbering (marked e.g. D0, D1, ...). As
MicroPython supports different boards and modules, physical pin numbering
was chosen as the lowest common denominator. For mapping between board
logical pins and physical chip pins, consult your board documentation.
Note that Pin(1) and Pin(3) are REPL UART TX and RX respectively.
Also note that Pin(16) is a special pin (used for wakeup from deepsleep
mode) and may be not available for use with higher-level classes like