RTEMS 4.7.99.2 On-Line Library

I/O Manager IO_WRITE - Write to a device

RTEMS Ada User's Guide

16.4.9: IO_WRITE - Write to a device

CALLING SEQUENCE:

procedure IO_Write (
   Major        : in     RTEMS.Device_Major_Number;
   Minor        : in     RTEMS.Device_Minor_Number;
   Argument     : in     RTEMS.Address;
   Result       :    out RTEMS.Status_Codes
);

DIRECTIVE STATUS CODES:

RTEMS.SUCCESSFUL - successfully initialized
RTEMS.INVALID_NUMBER - invalid major device number

DESCRIPTION:

This directive calls the device driver write routine specified in the Device Driver Table for this major number. Write operations typically require a buffer address as part of the argument parameter block. The contents of this buffer will be sent to the device.

NOTES:

This directive may or may not cause the calling task to be preempted. This is dependent on the device driver being invoked.

RTEMS Ada User's Guide