in8s()

Read 8-bit values from a port

Synopsis:

#include <hw/inout.h>

void * in8s( void * buff,
             unsigned len,
             uintptr_t port );

Since:

BlackBerry 10.0.0

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 in8s() function reads len 8-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.

Last modified: 2014-06-24



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