Interfacing STM32 MCU to micro-LED (µLED) display.

[Vins]

Hi Community,

I am working on Interfacing STM32 MCU to VGA LED display through SPI protocol.

Display Power Requirement.

1) Core Supply Provided : 1.2V, 1000mA. (required 200mA)

2) IO Supply : 2.5V, 1000mA. (required 200mA)

3) Cathode Supply : -2V, 200mA. (required 100mA)

The VGA LED display is consuming right amount of power but not turning on. What may be the reason?

By using company's provided hardware, Software-tool (GUI) I am able to turn-ON the display, getting the device id and do the operations. But using our customized hardware and company's provided drivers neither device is turned ON nor getting the device id.

Awaiting for suggestions and support.

Regards,

Vins.

[Peter BENSCH]

The display must certainly be controlled correctly via SPI. If you name the type of display and perhaps even better attach its data sheet, someone might be able to help you, because the current and voltage specifications are not sufficient.

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Regards

/Peter​

[Tesla DeLorean]

It would perhaps be easier to understand such issues if the make/model of display was provided, along with documentation, register tables, schematics for the company's board, your interpretation of that, and software examples that do actually successfully bring up the screen.

Right now could related to register settings, timings, external signalling/GPIO