ADLINK Technology HDV62, User Manual

Page: 132 / 164

Programming Guide 121
5.4.2.10EDID ROM Access Permission
Purpose
These functions read or write whether or not applications can
access the EDID ROM.
Prototype
 C/C++
HRESULT EDID_WriteAccessPermission (UINT Value)
HRESULT EDID_ReadAccessPermission (UINT *Value)
 C#
int EDID_WriteAccessPermission (uint Value)
int EDID_ReadAccessPermission (out uint Value)
 VB.Net
EDID_WriteAccessPermission (ByVal Value As
UInteger) As Integer
EDID_ReadAccessPermission (ByRef Value As UInteger)
As Integer
Parameters
 Status
Indicates whether or not the EDID ROM can be accessed.
The EDID ROM can be accessed by either application or
external device at the same time. So if you want to open
EDID, you need to open access permission, configure EDID
ROM, close access permission, and then plug external
device into DVI-I connector. Please see figure 4-2 for EDID
hardware architecture. Could be one of the following values:
0: EDID ROM is not accessible
1: EDID ROM is accessible
Return Value
No error occurs if return value >= 0; if negative value, call AMGet-
ErrorText function to get error information about return codes.