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Control GPIO ports on A64-OLinuXino

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Description

The package provide methods for controlling GPIO pins via memory access. It’s written for A64-OLinuXino, but it can be used with other boards. In this case proper operation is not guaranteed.

Notes:

  • When using GPIO make sure that the desired gpio is not used by another periphery.
  • Using this library requires root access.
  • Currently (0.1.0) port L is not supported, because the memory cannot be accessed from userspace.

GPIO methods

The following methods are available:

  • init() - Make initialization of the module. Must be called first.
  • getcfg() - Read current configuration of gpio.
  • setcfg() - Write configuration to gpio.
  • input() - Return current value of gpio.
  • output() - Set output value.
  • pullup() - Set pull-up/pull-down.

The available constants are:

  • HIGH - 1
  • LOW - 0
  • INPUT - 0
  • OUPTUT - 1
  • PULLUP - 1
  • PULLDOWN - 2

The gpio are named two ways:

  • By port name: PH0, PG2, PE10, etc. These can be imported from port module:
>>> from pyA64.gpio import port
>>> dir(port)
  • By connector name and pin number: gpio2p12, gpio3p8, lcdp18, uext1p3 and etc:
>>> from pyA64.gpio import connector
>>> dir(connector)

Generally these constants are just an offset in the memory from the base GPIO address, so they can be assigned to a number type variable.

>>> led = port.PE17
>>> print led
226

Changelog

  • pyA64 0.1.0 (21 NOV 2017)

    • Initial release

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