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Hi, E2E members
Can DS90UH949 read EDID value from External EEPROM?
> To use DDC, you must specify default address 0xA0 for I2C address.
> This address can be changed in FPD-Link register 0x51 on 949 device.
> From here, you can access over I2C what is stored on EDID through
> simple I2C writes and reads. Specify the register that you want to write/read
> and then the value that you want to write. For example:
> board.ReadI2C(0xA0, 0x00)
> board.WriteI2C(0xA0, 0x00, 0xFF)
I tried this commands on ALP but can't read EDID value.
Regards,
Nao
Hello Nao,
Are you trying this on the 949 EVM? If so, please note there's only a socket for external EEPROM. You have to buy and populate it to test this. I show below the schematic from user guide
U3 above is not populated.
A EEPROM similar to the one in the link below should work
Thanks,
Vishy
Hi, Vishy
Thank you for pointing it out.
MODE_SEL1 is #6 does not work well.
HDMI source (PC) can not read EDID from external EEPROM.
I tried you sequence but I can not read EDID with external EEPROM.
- MODE_SEL1 is #2
board.EDID_Read(0x0, 256)
[0, 255, 255, 255, 255, 255, 255, 0, 83, 14, 73, 9, 1, 0, 0, 0, 28, 24, 1, 3, 128, 52, 32, 120, 10, 236, 24, 163, 84, 70, 152, 37, 15, 72, 76, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 29, 0, 114, 81, 208, 30, 32, 110, 80, 85, 0, 0, 32, 33, 0, 0, 24, 0, 0, 0, 253, 0, 59, 61, 98, 100, 8, 0, 10, 32, 32, 32, 32, 32, 32, 0, 0, 0, 252, 0, 84, 73, 45, 68, 83, 57, 48, 85, 120, 57, 52, 57, 10, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 87, 2, 3, 21, 64, 65, 132, 35, 9, 127, 5, 131, 1, 0, 0, 102, 3, 12, 0, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 40]
Regards,
Nao