portio

low-level access to the hardware I/O ports More...

low-level access to the hardware I/O ports

The portio driver provides low-level access to the hardware I/O ports.

The digout bitfield of dio interface command structure needs lowest eight bits to be filled.

This driver provides data by filling lowest eight bit of dio interface bitfield.

Compile-time dependencies

• sys/io.h or hw/inout.h
• System Administrator rights

Provides

• dio

Requires

• none

Configuration requests

• none

Configuration file options

• port (integer)
  • Default: 888 (=378h - LPT1: 8-bit data output)
• sleep_nsec (integer)
  • Default: 10000000 (=10ms which gives max 100 main loop turns per second)
  • timespec value for nanosleep()

Example

driver
(
  name "portio"
  provides ["dio:0"]
  port 890
)

Author

Paul Osmialowski