Recent Posts

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61
TFTs / Arduino shield and micro SD card
« Last post by zenny6377 on March 21, 2018, 11:32:12 AM »
Hi - I'm just starting out with the NHD-FT81x-SHIELD on an arduino and the NHD-3.5R-FT812 display, I wanted to load a background graphic from the micro-SD card to superimpose my buttons on (or just draw a single image including the controls I want to click on)  There are no examples I can find of doing this, can anyone help?
62
TFTs / Touch shifting on NHD-7.0-HDMI-N-RSXV-RTU
« Last post by sherlock on March 21, 2018, 05:16:00 AM »
Hi,

I have sent an e-mail to nhtech@newhavendisplay.com, but did get any response.
So I ask my question here. Hope anyone can solve my problem.

I'm using NHD-7.0-HDMI-N-RSXV-RTU on my Win 10 PC. And connected with HDMI and USB.
But my touch panel has shift at the edge.

For an example:
  assume that left-top is origin (0,0) , total 800x480 pixels.
  when I touch (20, 20), the edge of panel, it responses at (50, 30) (obvious shift)
  but when I touch (400, 240), the center of panel, it responses at correct position (400,240)

Is that working properly? Why? Should I replace a new panel?


Very thanks
63
OLEDs / Re: Issue about drawing on NHD-1.27-12896UGC3
« Last post by balazs on March 19, 2018, 04:00:35 PM »
Hi Paul,

Since we have talked about the possible solutions, I tried them all of them. I have failed to resolve the issue, so I am using the display with this symptom.

I mean I am drawing the characters from left to right and from bottom to top and I have transformed my character arrays to be compatible with this way. Everything is okay with this method however I am curious why it is not working the same way as the display you have tried.

Thank you again for your help!

The display is great and shows nice characters.

Balázs

64
OLEDs / Re: Issue about drawing on NHD-0420CW-AY320 in i2c
« Last post by Paul_B on March 19, 2018, 07:45:52 AM »
Glad to hear you got your display up and running!
65
OLEDs / Re: Issue about drawing on NHD-0420CW-AY320 in i2c
« Last post by arrgon on March 19, 2018, 06:10:11 AM »
Thanks for your help.
It's finally working, I just changed the slave adress 0x3C by 0x78 and it works, Im so happy :) !

Bye
66
TFTs / EVE2 TFT Module VHDL Code Support (NHD-3.5-320240FT-CSXN-CTP)
« Last post by bivin on March 19, 2018, 12:06:34 AM »
I'm using NHD-3.5-320240FT-CSXN-CTP. But the device manual is not clear on how to program the module through SPI/QSPI interface using FPGA. Kindly explain how to initialize the module from FPGA. Sent "CLKEXT" , "ACTIVE" etc are bit unclear. Kindly share additional documents for the same. :-[
67
OLEDs / Re: NHD-0420CW-Ax3 I2C VDD level
« Last post by Ted_M on March 15, 2018, 09:35:05 AM »
Please refer to this post for clarification on the issue of using I2C mode at 5v:

http://www.newhavendisplay.com/NHD_forum/index.php/topic,3953.msg6560.html#msg6560
68
OLEDs / NHD-0420CW-Ax3 I2C VDD level
« Last post by tumbleweed on March 14, 2018, 05:59:04 PM »
Can the NHD-0420CW-Ax3 work with VDD=5V in I2C mode?

In the datasheet I2C interface section it states:
Supply Voltage for OLED and Logic
VDD = 2.8V for 2.8V operation ONLY, 5V mode not supported

Looking at the datasheet for the US2066 controller I don't see any such limit:
Section 10.5 I2C characteristics Ta=25degC, VDDIO = 2.4-3.6 / 4.5-5.5V, VSS =0V

The display datasheet seems pretty clear that it can't, but I was wondering what the limitation is.
69
Vacuum Fluorescent Displays / Re: M0216SD-162SDAR2-1 Jumper Settings
« Last post by kpengwin on March 12, 2018, 03:46:58 PM »
I recently got one of these M0216SD-162SDAR2-1 and am having a problem with the same symptoms as Mike_B back in 2016 - the display does not seem to turn on at all. I'm trying to use the display by bit-banging serial with an arduino.

I've bridged J3 and J5 and left the other jumpers alone.

I'm using pins as follows:
Pin 1: Gnd
Pin 2: +5V
Pin 3: Serial I/O
Pin 4: Strobe
Pin 5: not connected
Pin 6: Clock

I set the pins as output, and then send the following bytes (same as Mike_B was sending above)
  send_byte(B11111000);
  send_byte(B00111000);
  send_byte(B11111000);
  send_byte(B00001100);
  send_byte(B11111000);
  send_byte(B00000001);

my send_byte function is:

// transmit byte serially, MSB first
void send_byte(unsigned char data)
{
   output_low(PORTD, 3); //begin write cycle
   delay(1);
   int i;

   // send bits 7..0
   for (i = 0; i < 8; i++)
   {
       // consider leftmost bit
       // set line high if bit is 1, low if bit is 0

       if (data & 0x80)
           output_high(PORTD, 2);
       else
           output_low(PORTD, 2);

       // pulse clock to indicate that bit value should be read
       output_low(PORTD, 4);
       delay(1);
       output_high(PORTD, 4);
       
       // shift byte left so next bit will be leftmost
       data <<= 1;
       delay(1);
   }
   output_high(PORTD, 3); //end write cycle
   output_low(PORTD, 2); //end write cycle
   output_high(PORTD, 4); //end write cycle
   delay(1);
}

Anyone have any thoughts on what i might be doing wrong?
70
Graphic LCDs / Re: NHD-12864-WX serial mode
« Last post by Paul_B on March 12, 2018, 09:44:04 AM »
Hey j.campanelli,

I’m sorry to hear about the trouble you are having with the NHD-12864WX-T1TFH# display.

It would be helpful to verify your wiring / pinout. Feel free to post it below  ;)
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