NHD-7.0-800480FT-CSXN-CTP - Horizontal Dead Zones
Hi, I'm struggling with a new NHD-7.0-800480FT-CSXN-CTP display on a NHD-FT81x-SHIELD and an Arduino uno. I see horizontal dead bands that sweep vertically. Same issue with or without external supply.
Here are the settings I'm using off the datasheets:
#define DispWidth 800L //REG_HSIZE
#define DispHCycle 928L //Period Time
#define DispHOffset 88L //Pulse Width + Back Porch
#define DispHSync0 0L
#define DispHSync1 48L //Pulse Width
#define DispHeight 480L //REG_VSIZE
#define DispVCycle 525L
#define DispVOffset 32L //Pulse Width + Back Porch
#define DispVSync0 0L
#define DispVSync1 3L //Pulse Width
#define DispPCLK 2L // main clock div 60mhz/2
#define DispSwizzle 0L
#define DispPCLKPol 1L
#define DispCSpread 0L
#define DispDither 1L
I've run numerous examples from NHD and FTDI with the same issues. I'm concerned the display is damaged. Can any one offer some troubleshooting suggestions? Thanks in advance.
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Hi Scutty,
Please try running the following example code from our Github for the 7" EVE2 TFT.
https://github.com/NewhavenDisplay/EVE2-TFT-Modules/blob/master/7.0in/_800x480/Capacitive/FT_App_Graph/Project/Arduino/FT_App_Graph/FT_App_Graph.ino
If the power supply is known to be sufficient at 7V and at least 1A, this known configuration will work without issue.
Best Regards,0 -
Sure enough it was a power issue. Big thanks for the quick reply from NHD tech support. I should have know with all the warnings in the datasheet. My 6V supply can go back in the drawer. With a bench supply I found that 7V is the very minimum. This setup, no other shields or modules, pulled 750mA running this sample code. Now running with a 9V, 1A wall wart without issue. The above sample code ran stock, out of the box with no changes.
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