Read 8-bit values from a port
#include <hw/inout.h> void * in8s( void * buff, unsigned len, uintptr_t port );
- A pointer to a buffer where the function can store the values read.
- The number of values that you want to read.
- The port you want to read the values from.
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.
A pointer to the end of the read data.
The calling process must also use mmap_device_io() to access the device's I/O registers.