Max OS 0.3
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Public Member Functions | List of all members
MaxOS::hardwarecommunication::Port16Bit Class Reference

Handles 16 bit ports. More...

#include <port.h>

Inheritance diagram for MaxOS::hardwarecommunication::Port16Bit:
MaxOS::hardwarecommunication::Port

Public Member Functions

 Port16Bit (uint16_t port_number)
 Construct a new Port object for ports handling 16 bit read/writes.
 
virtual void write (uint16_t data)
 write a word to the port
 
virtual uint16_t read ()
 read a word from the port
 

Additional Inherited Members

- Protected Member Functions inherited from MaxOS::hardwarecommunication::Port
 Port (uint16_t port_number)
 Construct a new Port object.
 
- Protected Attributes inherited from MaxOS::hardwarecommunication::Port
uint16_t m_port_number
 The port to write to / read from.
 

Detailed Description

Handles 16 bit ports.

Definition at line 57 of file port.h.

Constructor & Destructor Documentation

◆ Port16Bit()

Port16Bit::Port16Bit ( uint16_t  port_number)
explicit

Construct a new Port object for ports handling 16 bit read/writes.

Parameters
port_numberThe IO port number

Definition at line 84 of file port.cpp.

85: Port(port_number) {
86}
MaxOS::hardwarecommunication::Port
base class for all ports
Definition port.h:20

Member Function Documentation

◆ read()

uint16_t Port16Bit::read ( )
virtual

read a word from the port

Returns
the word read

Definition at line 105 of file port.cpp.

105 {
106
107 uint16_t result;
108 asm volatile("inw %1, %0" : "=a" (result) : "Nd" (m_port_number));
109 return result;
110}
MaxOS::hardwarecommunication::Port::m_port_number
uint16_t m_port_number
The port to write to / read from.
Definition port.h:22

References MaxOS::hardwarecommunication::Port::m_port_number.

Referenced by MaxOS::drivers::ethernet::AMD_AM79C973::activate(), MaxOS::drivers::ethernet::AMD_AM79C973::AMD_AM79C973(), MaxOS::drivers::ethernet::AMD_AM79C973::handle_interrupt(), MaxOS::drivers::disk::AdvancedTechnologyAttachment::identify(), MaxOS::drivers::disk::AdvancedTechnologyAttachment::read(), and MaxOS::drivers::ethernet::AMD_AM79C973::reset().

◆ write()

void Port16Bit::write ( uint16_t  data)
virtual

write a word to the port

Parameters
datathe word to write

Definition at line 95 of file port.cpp.

95 {
96
97 asm volatile("outw %0, %1" : : "a" (data), "Nd" (m_port_number));
98}

References MaxOS::hardwarecommunication::Port::m_port_number.

Referenced by MaxOS::drivers::ethernet::AMD_AM79C973::activate(), MaxOS::drivers::ethernet::AMD_AM79C973::AMD_AM79C973(), MaxOS::drivers::ethernet::AMD_AM79C973::do_send(), MaxOS::drivers::ethernet::AMD_AM79C973::handle_interrupt(), MaxOS::drivers::ethernet::AMD_AM79C973::reset(), and MaxOS::drivers::disk::AdvancedTechnologyAttachment::write().

The documentation for this class was generated from the following files: