Control GPIO ports on A64-OLinuXino
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.
- 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.
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
pyA64 0.1.0 (21 NOV 2017)
- Initial release
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