Write 8-bit values to a port
#include <hw/inout.h> void * out8s( const void * buff, unsigned len, uintptr_t port );
- A pointer to a buffer that holds the values that you want to write.
- The number of values that you want to write.
- The port you want to write the values to.
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The out8s() function writes len 8-bit values from the buffer pointed to by buff to the specified port.
A pointer to the end of the written data.
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.