Read 8-bit values from a port
#include <hw/inout.h> void * in8s( void * buff, unsigned len, uintptr_t port );
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The in8s() function reads len 8-bit values from the specified port and stores them in the buffer pointed to by buff.
The calling process must use mmap_device_io() to access the device's I/O registers.
On x86 targets, the calling thread must have I/O privileges, or else it will fault with a SIGSEGV; see the ThreadCtl() _NTO_TCTL_IO command for details.
A pointer to the end of the read data.
in8(), in16(), in16s(), in32(), in32s(), mmap_device_io(), out8(), out8s(), out16(), out16s(), out32(), out32s()