U8g2 ST7565 LCD display connecting (Arduino Mega2650)

Other Hardware Displays
1

Hello guys!
I bought an LCD display whose nameplate can be found here: https://www.lairui.com/uploads/file/2020614/LG12864K-DW.pdf !
The company sent a word document containing a drawing of the LCD connection! Based on the drawing, the connection panel (3.3V) is ready!

Arduino-LCD_'
Arduino-LCD_'1211×716 21.5 KB

Arduino-LCD_2
Arduino-LCD_2903×795 29.7 KB

So far there is no problem (soldered, resistors connected in the right places), but they can't tell you which U8G2 should be used for it, apart from ST7565 !! Another thing is that nothing appears on the display (no light, no factory preset icon or anything else)! When connecting, only a few stripes appear vertically and horizontally, but they disappear after a maximum of 0.5 seconds!
Has anyone encountered this display or something similar?

Arduino Mega that I use !!
I have included another part that I think controls the settings of the lcd, for which #include <U8g2lib.h> indicates an error:

void LCD_Init(void)
{
	LCD_WriteCommand(0xAE);   // Set Display On/Off
	                          // Default => 0xAE
	                          // 0xAE => Display Off
	                          // 0xAF => Display On

	LCD_WriteCommand(0xA2);   // Set LCD Bias
	                          // Default => 0xA2
	                          // 0xA2 => 1/9 Bias
	                          // 0xA3 => 1/7 Bias

	if (DIRECTION == 1)          // Set NORMAL display direction
	                          // DIRECTION=1, SEG normal/COM reverse
	{
		LCD_WriteCommand(0xA0); // ADC Select (Set SEG output direction)
		                        // Default => 0xA0
		                        // 0xA0 => ADC=0, SEG output normal direction. Column Address 0 Mapped to SEG0
		                        // 0xA1 => ADC=1, SEG output reverse direction. Column Address 131 Mapped to SEG0
		LCD_WriteCommand(0xC8); // COM Output Mode Select (Set COM output scan direction) 
		                        // Default => 0xC0
		                        // 0xC0 => COM output scan normal direction. Scan from COM0 to 63
		                        // 0xC8 => COM output scan reverse direction. Scan from COM63 to 0
	}
	else                       // Set REVERSE display direction
	                          // DIRECTION=0, SEG reverse/COM normal
	{
		LCD_WriteCommand(0xA1); // ADC Select (Set SEG output direction)
		                        // Default => 0xA0
		                        // 0xA0 => ADC=0, SEG output normal direction. Column Address 0 Mapped to SEG0
		                        // 0xA1 => ADC=1, SEG output reverse direction. Column Address 131 Mapped to SEG0
		LCD_WriteCommand(0xC0); // COM Output Mode Select (Set COM output scan direction) 
		                        // Default => 0xC0
		                        // 0xC0 => COM output scan normal direction. Scan from COM0 to 63
		                        // 0xC8 => COM output scan reverse direction. Scan from COM63 to 0
	}

	LCD_WriteCommand(0xF8);   // Set Booster Ratio, users should set booster ratio to match hardware connection.
	LCD_WriteCommand(0x00);   // 0x00 => 2x,3x,4x
	                          // 0x01 => 5x
	                          // 0x11 => 6x
	LCD_WriteCommand(0x25);   // Set V0 Voltage Regulator Internal Resistor Ratio
	                          // Set 1+Rb/Ra=5.5 (D2D1D0=101)
	SetContrast(5);             // Set Contrast
	                          // IT IS STRONGLY SUGGESTED that users design the software with contrast adjustable

	LCD_WriteCommand(0x40);   // Set Start Line = 0
	LCD_WriteCommand(0x2C);   // Power Control Set
	                          // Set Booster Circuit (VC) ON
	LCD_WriteCommand(0x2E);   // Power Control Set
	                          // Set Booster Circuit (VC) & Voltage Regulator (VR) ON
	LCD_WriteCommand(0x2F);   // Power Control Set
	                          // Set Booster Circuit (VC) & Voltage Regulator (VR) & Voltage Follower (VF) ON
	ClearScreen();              // Clear screen before set display ON
	LCD_WriteCommand(0xAF);   // Set Display On/Off
	                          // Default => 0xAE
	                          // 0xAE => Display Off
	                          // 0xAF => Display On
}


//*******************************************************************
//  Set LCD contrast
//  contrastLevel: LCD contrast level, ranging from 0 to 10, total 11 levels.
//          	  0 = Minimum level
//                 5 = Medium level	(default)
//                10 = Maximum level
//
//  IT IS STRONGLY SUGGESTED that users design the software with contrast adjustable.
//
//*******************************************************************

void SetContrast(uchar contrastLevel)
{
	uchar contrast;                  //Electronic volume value
	
	contrast = 0x25 + 2*contrastLevel;   //Contrast for contrastLevel 5 = 0x25+2*5=0x2F
	                               //V0 = 10.3V
	LCD_WriteCommand(0x81);        //Electronic volume mode set	
	LCD_WriteCommand(contrast);     //Set electronic volume value
}

SI = /* clock=/ 13
SCL = /* data=/ 11
A0 = /* dc=/ 9
CS1 =/ cs=*/ 10

For HW_SPI controllers, stripes appear on the display!
SW_SPI the display is completely empty!
The display receives 3.3V via 7803 mosfet!
I have already tried these from ST7565!

  U8G2_ST7567_OS12864_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //U8G2_ST7567_JLX12864_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //U8G2_ST7567_OS12864_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3); 
  //U8G2_ST7567_ENH_DG128064_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //U8G2_ST7567_ENH_DG128064_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/9, /* reset=*/ A3); 
  //U8G2_ST7567_ENH_DG128064I_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //U8G2_ST7567_ENH_DG128064I_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 13, /* dc=*/ 9, /* reset=*/ A3);
  // U8G2_ST7565_64128N_F_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 13, /* dc=*/ 9, /* reset=*/ A3);
   
  // U8G2_ST7565_LM6059_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  // U8G2_ST7565_64128N_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //  U8G2_ST7565_LM6059_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //  U8G2_ST7565_ERC12864_F_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //  U8G2_ST7565_ERC12864_ALT_F_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  // U8G2_ST7565_64128N_F_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);


  // U8G2_ST7565_EA_DOGM128_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //  U8G2_ST7565_EA_DOGM128_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //U8G2_ST7565_64128N_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //  U8G2_ST7565_64128N_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //U8G2_ST7565_EA_DOGM132_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ U8X8_PIN_NONE);	// DOGM132 Shield
  //  U8G2_ST7565_EA_DOGM132_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 13, /* dc=*/ 11, /* reset=*/ U8X8_PIN_NONE);	// DOGM132 Shield
  //U8G2_ST7565_ZOLEN_128X64_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //  U8G2_ST7565_ZOLEN_128X64_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //U8G2_ST7565_LM6059_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);		// Adafruit ST7565 GLCD
  //  U8G2_ST7565_LM6059_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);			// Adafruit ST7565 GLCD
  //U8G2_ST7565_KS0713_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);		// KS0713 controller
  //  U8G2_ST7565_KS0713_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);			// KS0713 controller
  //U8G2_ST7565_LX12864_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);;
  //  U8G2_ST7565_LX12864_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //U8G2_ST7565_ERC12864_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //  U8G2_ST7565_ERC12864_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //U8G2_ST7565_ERC12864_ALT_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3); // contrast improved version for ERC12864
  //  U8G2_ST7565_ERC12864_ALT_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3); // contrast improved version for ERC12864
  //U8G2_ST7565_NHD_C12832_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 22, /* reset=*/ A3);
  //  U8G2_ST7565_NHD_C12832_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //U8G2_ST7565_NHD_C12864_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //  U8G2_ST7565_NHD_C12864_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //U8G2_ST7565_JLX12864_1_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ 13, /* data=*/ 11, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);
  //  U8G2_ST7565_JLX12864_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ A3);

kép
kép3024×4032 2.4 MB

2

I hope that is a voltage regulator and not a MOSFET as stated. Can you post an annotated schematic showing exactly how this is wired, be sure to show all power sources. Also which Arduino are you using? Some of the Arduinos such as the UNO and MEGA are 5 volts and may have damaged your display.

3

Hi gilshultz!
You're right, I wrote it wrong, not a mosfet if it wasn't a LM7803 stabilizer! https://www.prototypediy.co.za/product/lm7803-voltage-stabilizer/
Arduino Mega 2650 that I use and you can see the drawing of the LCD connection in the first two photos!
I think the problem here is not with the 3.3V, if not with the connection of the Mega pin! I measured the input to the LCD and it was 3.26 V!
In the manufacturer's description, it should be between 3.2-3.3, so the value that the 7803 produces and reaches the display is good! 7803 gets its voltage from the 5V output of the Mega and GND is from there too!

4

This is the first time I have come across a voltage regulator called a stabilizer, 'prototype' called that in the Spec you posted. You correctly quoted what they said. As you get further into it it also ambiguous called it a regulator. Look up the part data sheet from the manufacturer you will see they missed a lot of information. You need bypass capacitors for it to work properly, they prevent oscillation. I highly recommend you use an external supply until you get it working. Be sure to connect the grounds.

5

kép
kép3024×4032 2.72 MB

There are so many changes that the white stripes just flash and disappear! So far, the white stripes have been flashing at the HW_SPI lines! I tried all the lines of code linked above, but still no text is displayed!

6

Can you post an actual schematic of how it is wired. Show all connections, power, ground connections and post links to hardware items that you have not already posted. You show 10 C2s and 8 C1s, your arduino9 has no pin numbers etc. I am not familiar with the display, but I am trying to help best I can.

7

I bought it here: https://vi.aliexpress.com/item/1005003601221430.html
I have already published everything there is to know about the display!
In practice, the manufacturer sent me the wiring diagram of the assembled panel ( https://ae01.alicdn.com/kf/H501fb42806224affa541b444faf543f0F.jpg )!
I have a feeling that WriteCommand(0xAE); and the other settings are also needed for it to work, but olikraus can tell you that!
I looked at one of the descriptions of olikraus earlier and there was this definition:
//sck = clock = Mega pin 52
//moshi = data = Mega pin 51
//A0 = dc = digital pin can be anything
// cs = digital pin can be anything
// reset = digital pin can be anything
So the currently used clock 13 and data 11 connections are not good, because the Mega is located at 52 and 51!
The display is connected according to (4x booster)!
Now I have modified it so much that I feed 7803 from an external current and the display receives the 3.3V and the ground from there!
Because I wrote to olikraus, but he hasn't responded to it so far, so it will be a bit difficult to figure out what the error might be because he sees things better! It is also necessary to determine somehow which control line is compatible with the ST7565P!
Thank you for help me!

8

I do not work with word schematics, Good Luck!

9

You can download the complete documentation of the display here:
https://www.devicemart.co.kr/goods/download?id=1111823&rank=1

10

That link is not what I asked for. Good Luck

11

kép
kép3024×4032 2.19 MB

Everything was connected on the basis of the manufacturer's instructions! I'm sorry, that's all I have, I'm not an electrical engineer to be able to send a standard wiring diagram!

12

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