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