LCD COG 128x64 ST7567 shows nothing

[mpinhocode]

I have a 20-Pin COG display and I was trying to make it works with the U8g2.h library and Arduino Due but the display shows nothing. Could someone please help me?

HGO1286427-P-F (Complete).pdf (1.42 MB)

[david_prentice]

Use a constructor like:

U8G2_ST7567_JLX12864_1_4W_SW_SPI(rotation, clock, data, cs, dc [, reset]) [page buffer, size = 128 bytes]

Your schematic shows that you know how to connect PSB = GND.
However I would connect CSB to a GPIO pin.
And always use the RESET argument in the constructor.

Let us know how you get on.

When SW_SPI is working, you might consider HW_SPI.

David.

[mpinhocode]

Thank you very much David !!
It would be this...?

Void Setup

pinMode(52 , OUTPUT);

Void loop

digitalWrite(52, LOW); //CSB Pin

I tried to use the constructor with all the arguments, but not worked.

U8G2_ST7567_JLX12864_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 7, /* dc=*/ 9, /* reset=*/ 8);

[david_prentice]

No, you don't need any pinMode or digitalWrite

Just wire your display to the Due using the pins in your constructor i.e.

// name       LCD  Due   
/* clock=*/     9   13, 
/* data=*/      8   11, 
/* cs=*/       20    7,    
/* dc=*/       18    9, 
/* reset=*/    19    8

Obviously you should say which library example you are using. i.e. the name

David.

[mpinhocode]

I tried the GraphicsTest example from U8g2lib.h, nothing yet.

Matheus.

[david_prentice]

I always feel happier with a module that comes with header pins e.g. SPI display

At least you know that the ribbon is professionally soldered and any external capacitors, regulator, ... are mounted.

Please post a photo of your wiring. Foreign eyes might spot a problem.
Your schematic looks 100% to me.

I just quoted the first 128x64 constructor on the U8g2 Wiki. You can try the other SW_SPI ones.

David.

[mpinhocode]

It is working now!!

I made a converter board from the upper contacts connector to header pins, then, checking the hardware again I had inverted the display flat on the connector, I made this mistake.

About the code I used the following constructor:

U8G2_ST7567_OS12864_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 7, /* dc=*/ 9, /* reset=*/ 8);

The contrast was low, then I adjusted using:

 u8g2.setContrast(64);

Click here to watch a test video.

Thank you very much!
Matheus.

[david_prentice]

Did your display panel come with the Adapter board?

There are an awful lot of wires?
I am not surprised that anyone could make a mistake.

The video quality is pretty crap. I assume that you get a nice crisp picture in real life.

Try some other constructors. Oliver might have set the contrast register to different value for different makes.
Then try a hardware constructor. Not that speed or number of GPIO pins matters on a Due. LCDs look smeary if you write too fast.

David.

[mpinhocode]

I made this adapter on EasyEDA then I bought it.

I removed the unused wires.

There is a picture attached that you can see better.

I will try some other constructors. Thank you.

Mathues.

[david_prentice]

Did you design the pcb, get it made, mail it to you, ... ?
How much did it cost?
How long to arrive ?

I find it easier to buy a ready-made module. Probably cheaper too !!

Of course it is different if you want to make 1000 boards.

David.

[mpinhocode]

I tried these constructors:

//U8G2_ST7567_JLX12864_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 7, /* dc=*/ 9, /* reset=*/ 8);  
//U8G2_ST7567_JLX12864_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 7, /* dc=*/ 9, /* reset=*/ 8);  
//U8G2_ST7567_OS12864_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 7, /* dc=*/ 9, /* reset=*/ 8);  
//U8G2_ST7567_OS12864_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 7, /* dc=*/ 9, /* reset=*/ 8);  
//U8G2_ST7567_ENH_DG128064_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ 8); 
//U8G2_ST7567_ENH_DG128064_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ 8); 
//U8G2_ST7567_ENH_DG128064I_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ 8); 
//U8G2_ST7567_ENH_DG128064I_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ 8);

And only this one worked with the contrast low:

//U8G2_ST7567_OS12864_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 7, /* dc=*/ 9, /* reset=*/ 8);

Ps.: Attached there is the picture I mentioned before.

[mpinhocode]

Yes, I made that process you mentioned and it cost me 3$ for 5 pcs... but a ready-made module would better.

Matheus.