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Write words to a port
#include <hw/inout.h>
void * out16s( const void * buff,
unsigned len,
uintptr_t port );
- val
- A pointer to a buffer that holds the values that you want to write.
- len
- The number of values that you want to write.
- port
- The port you want to write the values to.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The out16s() function writes len words from the buffer
pointed to by buff to the specified port.
A pointer to the end of the written data.
QNX Neutrino
Safety: | |
Cancellation point |
No |
Interrupt handler |
Yes |
Signal handler |
Yes |
Thread |
Yes |
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.
in8(),
in8s(),
in16(),
in16s(),
in32(),
in32s(),
mmap_device_io(),
out8(),
out8s(),
out16(),
out32(),
out32s()
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