FRDM-MCXN947 : smartdma_camera_flexio_mculcd demo example issue : only one line on LCD

[tgrandpi]

Hello,

I successfully solder and connect my FRDM-MCXN947 to OV7670 camera and LCD PAR-LCD-S035 since I am able to run the demo "Multiple face detection on MCXN947" provided using MCUXpresso Projects from Application Code Hub. 

My problem is that I encounter the following issue executing the "frdmmcxn947_smartdma_camera_flexio_mculcd example" : only one line of the camera is displayed on the top of the LCD display.

I am running the latest MCUXpresso version (24.12)

I get the "frdmmcxn947_smartdma_camera_flexio_mculcd example" directly from MCUXpresso using "Welcome"->Import SDK Examples ->Go straight to the Wizard" then frdmmcxn947 board (SDK 2.x_MCXN947/version 2.16.100/Manifest 3.14.00), then "display_examples" then "smartdma_camera_flexio_mculcd". 

This project compiles, download and executes correctly but I get a black lcd screen with only one line updated by the camera.

I read the doc given on AN14191.pdf ( on https://docs.nxp.com/bundle/AN14191/page/topics/software.html#topic_30f829c2-0650-45e1-ab55-32097902... ) but that doesn't help much to understand the poorly commented code of the example.

Many thanks for your help,

Thierry

[tgrandpi]

Dear Alice,

Thank you so much, it works now : the problem was the source code example :

I used the one provided from the MCUxpresso interface (Import SDK Examples ->Go straight to the Wizard" then frdmmcxn947 board (SDK 2.x_MCXN947/version 2.16.100/Manifest 3.14.00), then "display_examples" then "smartdma_camera_flexio_mculcd")

which is faulty.

The AN14191SW.zip  is perfect ! (and totaly different).

Have a nice day !

[tgrandpi]

Thank you Alice, but I already did that 3 modifications in order to run successfully the "Multiple face detection"  demo.

So this is not a hardware problem since that demo work.

Thank you for your help.

[Alice_Yang]

Hello @tgrandpi 

Please download the code from the AN14191 resource https://www.nxp.com/docs/en/application-note-software/AN14191SW.zip . 

I've tested it on my end, it works well.

Thank you.

BR

Alice

[Alice_Yang · Accepted solution]

Hello @tgrandpi 

Please rework your board according to the following picture:

BR

Alice