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Messages - Ted_M

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Character LCDs / Re: Command structure for NHD-0220D3Z-FL-GBW-V3
« on: August 09, 2019, 04:59:18 PM »
Please confirm the RS-232 signal driving the display is 5V TTL .

Best Regards,

« on: August 09, 2019, 04:54:59 PM »
This effect could be caused by an insufficient DC power supply.
Please try a 6v or 7v, 2amp power supply for this HDMI display.

Best Regards,

Graphic LCDs / Re: NHD-3.5-320240MF-ATXL#-CTP-1-ND
« on: July 23, 2019, 10:47:07 AM »
From the NV3035C datasheet, it appears that the serial timing diagram on page 32 shows the Vertical Sync line VSD to be high during the Active Low Serial Chip select SPENB.
Please confirm this is performed and let us know if you are able to process the serial commands.

Best Regards,


Sorry to hear you are having some trouble getting the EVE2 TFT display working properly.

When using the NHD-FT81x-SHIELD, it is only necessary to power the Arduino itself with the 9v to 12v and 3Amp DC wall supply. 

Do not power the EVE2 TFT pins with a separate 3.3v supply in this case. 

Using a 12v supply for the Arduino may be necessary if the 20 pin interface cable is longer than 8" to 10" or if you have other devices connected on the 20 pin interface cable or SPI bus. 

It is ok to keep the USB programming cable connected to the Arduino at the same time as the DC supply for convenience in programming and testing simultaneously.

The Arduino Shield will supply 5v to drive the backlight voltage booster circuit on the EVE2 PCB so that chip will be cooler as it will produce up to 26v to drive the LED's for the backlight depending on the TFT display connected.

Best Regards,


TFTs / Re: NHD-5.0-HDMI-N-RTXL-CTU - Provide power from USB 3.0 Port
« on: July 05, 2019, 10:21:04 AM »
Hi George,

Please contact me at

Best Regards,

Hi Drew,

If there is radiated electrical noise causing the capacitive touch anomalies, and grounding the frame of the TFT is of no effect, then it may be necessary to add a grounded EMI mesh layer between the TFT and the capacitive touch screen in order to reduce the effects of internal electrical noise contributing to this issue. 
Please let us know if this is an option you wish to explore and we can work with you to provide a customized solution.

Best Regards,

TFTs / Re: NHD-4.3-480272EF-ASXN# Backlight but no Graphic Data
« on: June 27, 2019, 10:05:00 AM »
Hi Dan,

Please try these RGB timings for the NHD-4.3-480272EF-ASXN# display and let us know if this resolves the issue.

DispWidth = 480;
DispHeight = 272;
DispHCycle =  548;
DispHOffset = 43;
DispHSync0 = 0;
DispHSync1 = 41;
DispVCycle = 292;
DispVOffset = 12;
DispVSync0 = 0;
DispVSync1 = 10;
DispPCLK = 5;
DispSwizzle = 0;
DispPCLKPol = 1;
DispCSpread = 1;
DispDither = 1;

Best Regards,

Character LCDs / Re: Beaglebone black LCD4 and PWM
« on: June 27, 2019, 09:53:25 AM »
Hi Richard,

This link from Ti's Processor Forum may guide you down the right path.

Best Regards,

Character LCDs / Re: NHD-0108CZ-FL-GBW initialization
« on: June 27, 2019, 09:46:46 AM »
Hi Glenn,

The schematic in your attachment is showing that the display is connected for 4-bit parallel mode, but the data lines are connected to DB0-DB3.
In order to configure this display for 4-bit parallel mode, the data lines would need to be connected to DB4-DB7.
Please try this wiring configuration and let us know if this solves the problem.

Best Regards,

Hi Dharma,

The 4 LED backlight pins on the side of the display are directly connected to the LEDs.  Each of the 3 color LEDs can be connected to a pulse width modulated current source to provide the level of brightness desired by each color.  In this manner, it is possible to create the specific color you wish to display as the backlight.

Best Regards,

« on: June 27, 2019, 08:41:22 AM »
Hi Arjun,

It's good to hear you have it working! Thanks for posting your fix to this issue as I know it will help others with a similar experience.

Best Regards,

Sorry to hear this is still an issue.  Please email me at and I will assist you in resolving this issue.

Best Regards,

TFTs / Re: NHD-5.0-800480TF-ATXL#-CTP VS. NHD-7.0-800480EF-ASXN#-CTP
« on: June 19, 2019, 04:53:59 PM »
Hi Mike_S,

It's good to hear you have it working!

You are correct that the 7.0" TFT is setup to work in DE mode by default.  The display's Data Enable mode is Active High at pin 34 to enable the data input bus.

Best Regards,

« on: June 19, 2019, 08:37:43 AM »
Hi Arjun,

Try reducing the SPI clock to less than 11Mhz before sending the Active command.
Please see Page 11 of the FT81X Series Programmers Guide for reading the chip identification code and the recommended initialization when booting up the display:

Send Host command “ACTIVE” to enable the clock to the FT81X.
FT81X starts its self diagnosis process and may take up to 300ms.
Alternatively, read REG_ID repeatedly until 0x7C is read.

After reset or reboot, the chip ID can be read from address 0xC0000 to 0xC0003.

Best Regards,

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