Display configuration

[tech_mofu]

Hi Nxp team,

We are working on xpc560s EVB (176 pin module) for developing low-cost instrument cluster. 

We used New Heaven display ( NHD-4.3-800480CF-ASXP-CTP) with lab0 code for this exercise.

We first tried to test the interface between DCU and the TFT LCD panel by using color bar mode.

We could mode two observations from this,

1. When the  Invert Horizontal & Vertical Synchronize signals (from SYN_POL Register) is active low we can see the pattern but the color is not matching(attached the image below-colour_bar_H_V_Inv.jpg) as per the COL_BAR1..8 Register.

2.When the Invert Horizontal & Vertical Synchronize signals (from SYN_POL Register) is active high we can see some pattern as per the COL_BAR1..8 Register(Image-colour_bar_H_V.jpg) but some are missing in the sequence.

DCU is configured as per the New Heaven display ( NHD-4.3-800480CF-ASXP-CTP). 

RASTER_EN bit was also enabled in this exercise.

Kindly verify which observation is correct and guide us to proceed further.

Thanks 

Vivishekh

[davidtosenovjan · Accepted solution]

Hi, do you have correctly connected RGB signals according panel manufacturer's datasheet?

Have you checked AN4187?

https://www.nxp.com/docs/en/application-note/AN4187.pdf

[tech_mofu]

Thanks David for the inputs.

We did not configure the DE (Display enable) port correctly. Once we configured appropriately at the DCU side it worked. 

We tested the Bar graphs and Freescale bitmap display and it worked.

Regards

Raghu