Read an 8-bit value from a port
#include <hw/inout.h> uint8_t in8( uintptr_t port );
- The port you want to read the value from.
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The in8() function reads an 8-bit value from the specified port.
An 8-bit value.
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.