No video output - Githubissues

deltabeard / cmio

Custom Raspberry Pi Compute Module (1/3) IO Board

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No video output #17

Open deltabeard opened 7 years ago

deltabeard commented 7 years ago

Built v0.4. Has no video output via the composite port.

Checking possibility that EMMC_DISABLE_N pin requires extra circuity to continue booting, although the Compute Module datasheet says this is only required under certain circumstances.

Have to check all pins on the RAM slot are correctly soldered.

deltabeard commented 6 years ago

The Compute Module is detected by a connected USB host device when an SD card is not inserted on reset.

deltabeard commented 6 years ago

Possible next steps:

Connect the EMMC_DISABLE_N pin to an LED to check possible error codes.
Activate serial connection and attempt to boot a Linux distro on it.

deltabeard commented 6 years ago

It's difficult to get to the EMMC_DISABLE_N pin on the RAM slot, so a new version of the cmio will be manufactured.

deltabeard commented 6 years ago

Nothing on the serial port is printed when using the bootcode.bin file with extra debugging enabled.