in16s()

Read 16-bit values from a port

Synopsis:

#include <hw/inout.h>

void * in16s( void * buff,
              unsigned len,
              uintptr_t port );

Arguments:

buff: A pointer to a buffer where the function can store the values read.
len: The number of values that you want to read.
port: The port you want to read the values from.

Library:

libc

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

Description:

The in16s() function reads len 16-bit values from the specified port and stores them in the buffer pointed to by buff.

Returns:

A pointer to the end of the read data.

Classification:

QNX Neutrino

Safety:
Cancellation point	No
Interrupt handler	Yes
Signal handler	Yes
Thread	Yes

Caveats:

The calling thread must have the PROCMGR_AID_IO ability enabled and must have I/O privileges; see procmgr_ability() , and 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.