topic iMX8ULP always-on 1hz refresh rate display example of AN13914 in i.MX Processors

iMX8ULP always-on 1hz refresh rate display example of AN13914

ferringer1 — Mon, 04 Mar 2024 08:58:50 GMT

Hello Community,

we do have an iMX8ULP evaluation board with the corresponding LCD display. While the display itself works fine under Linux, we are not able to the the 1Hz always-on display example from AN13914 running. Everything seems to work (we can reproduce the power consumption numbers etc), but the screen stays just black. We don't see any activity on the screen whatsoever.

Has anyone been able to get this demo running?

Regards,

Markus

Re: iMX8ULP always-on 1hz refresh rate display example of AN13914

Zhiming_Liu — Wed, 06 Mar 2024 02:27:27 GMT

Hi @ferringer1

Please check the steps refering the AN.

Best Regards

Zhiming

Re: iMX8ULP always-on 1hz refresh rate display example of AN13914

ferringer1 — Wed, 06 Mar 2024 07:40:20 GMT

As it turns out, there are two binary files in the ZIP file:
flash_aod_RK055AHD091.bin
flash_aod_RK055MHD091.bin

*NOT* according to the description of the AN, you have to flash the second one, with the "M" in it. Works now.

Is there any chance to get the sourcecode of the M33 binaries? I cannot find it in the examples of the SDK.

Re: iMX8ULP always-on 1hz refresh rate display example of AN13914

bernhardfink — Mon, 18 Mar 2024 16:16:20 GMT

Hi Markus,

isn't it more or less this one: ..\SDK_2_15_000_EVK-MIMX8ULP\boards\evkmimx8ulp\demo_apps\low_power_display

This is of course just the M33 part of it, the much bigger binaries from the app note software package also include the rest of the boot image.

Regards,
Bernhard.