Custom I2C command over EDID link

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How would I send some simple controls from a PC to some hardware attached to a Display Monitor over its existing I2C bus that is used for EDID communications(but without using NicomSoft WinI2C/DDC DLLs)? I have a working system using WinI2C/DDC DLLs but I want to write my own DLLs that I can distribute or just hardcode my app to the single address.

In Tunr off monitor when machine gets locked[^]

I can see how to send predefined adress and data to the Display Monitor over the I2C (i.e. turn monitor on/off). How can I specify the address of my additional hardware in a DLL? Or, how can I hardcode my App for a write to address 8C with data = 32 or 33 hex so I can talk to my hardware that is connected to the bus inside the Display?

Posted 2-Feb-12 18:41pm

outlandtechnologiesinc

Updated 3-Feb-12 19:23pm

v4

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Wendelius 3-Feb-12 0:46am

Link formatted

Mohibur Rashid 3-Feb-12 4:18am

What are you Using? what device? What Micro-controller? what I2C chip, or may be no I2C Chip, the what it is?

outlandtechnologiesinc 4-Feb-12 0:46am

A PC. Standard I2C link in VGA or DVI cables used for EDID from the monitor. I already have a working prototype using NicomSoft WinI2C/DDC. I'm looking to write my own DLL so I don't have to use NicomSoft WinI2C/DDC since I only need to talk to one fixed address.

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