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Write a 32-bit value to a port
#include <hw/inout.h>
void out32( uintptr_t port,
uint32_t val );
#define outbe16( port,
val ) ...
#define outle32( port,
val ) ...
- port
- The port you want to write the value to.
- val
- The value that you want to write.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The out32() function writes the 32-bit value, specified by val,
to the specified port.
The outbe32() and outle32() functions macros the native-endian 32-bit value,
specified by val, to the specified port in big-endian or little-endian
format, respectively.
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.
outbe16() and outle16() are implemented as macros.
in8(),
in8s(),
in16(),
in16s(),
in32(),
in32s(),
mmap_device_io(),
out8(),
out8s(),
out16(),
out16s(),
out32s()
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