General Info
Interface: IOPortManager Files: ioportmanager.h Last Change: 30/07/2002 Author: Luiz Henrique Shigunov	Description
System Functions
0x00 - Alloc - Allocate IO ports 0x01 - Free - Free IO ports	0x02 - IsInUse - Check if an IO port is in use

Description

This page describes the IOPortManager interface which provides IO port allocation control to avoiding conflicts (two modules want to use the same port).

Registering an IO port doesn't inhibits other modules from using the IO port.

0x00 - Alloc

Syntax

int IOPortManager_Alloc(SysModManager_Module *modID, unsigned int start, unsigned int end, int prop);

Properties

System
Phase 0

Description

This function registers that modID is using IO ports start - end, including.

prop must be 0 or the sum of:

0x01 - Register even if it's in conflict

Return value

E_OK - Success
E_IN_USE - IO port in use
E_NO_MEMORY - Not enough memory

0x01 - Free

Syntax

int IOPortManager_Free(SysModManager_Module *modID, unsigned int start);

Properties

System
Phase 0

Description

This function unregisters that modID is using IO port interval that starts at start.

Return value

E_OK - Success
E_BAD_VALUE - invalid interval

0x02 - IsInUse

Syntax

int IOPortManager_IsInUse(unsigned int portN);

Properties

System
Phase 0

Description

This function checks if portN is in use.

Return value

E_IN_USE - it's in use
E_NOT_IN_USE - it isn't in use