out8()

Write an 8-bit value to a port

Synopsis:

#include <hw/inout.h>

void out8( uintptr_t port, 
           uint8_t val );

Arguments:

port

The port you want to write the value to.

val

The value that you want to write.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The out8() function writes an 8-bit value, specified by val, to the specified port.

Classification:

QNX Neutrino

Caveats:

The calling thread must have I/O privileges; see ThreadCtl()'s _NTO_TCTL_IO command for details.

The calling process must also use mmap_device_io() to access the device's I/O registers.

See also:

in8(), in8s(), in16(), in16s(), in32(), in32s(), mmap_device_io(), out8s(), out16(), out16s(), out32(), out32s()