SYNTAX
void rtapi_outb(unsigned char _byte_, unsigned int _port_);
unsigned char rtapi_inb(unsigned int _port_);ARGUMENTS
- port
-
The address of the I/O port
- byte
-
The byte to be written to the port
BESKRIVELSE
rtapi_outb writes a byte to a hardware I/O port. rtapi_inb reads a byte from a hardware I/O port.
SANNTIDSBETRAKTNINGER
May be called from init/cleanup code and from within realtime tasks. Not available in non-realtime components.
RETURVERDI
rtapi_inb returns the byte read from the given I/O port
MERKNADER
The I/O address should be within a region previously allocated by rtapi_request_region. Otherwise, another real-time module or the Linux kernel might attempt to access the I/O region at the same time.
SE OGSÅ
rtapi_region(3)