2.8 inch lcd 8 bit parallel interface

[shreyas_patel21]

hi all

I am using 2.8 inch LCD mtf0280qn with NIOS II processor.

please give me code of the LCD if anybody have.


thank you

 

[doraemon]

Hello!

Be it NIOS or not, if you can find a C driver, then you're done.
There are many example on the net. Why not using google first?

Dora

 

[shreyas_patel21]

hi,

I have already searched it

I have tried below code but its not working:

// EXIT IDLE mode Setting
    Set_LCD_8B_REG(0x18,0x36); //I/P_RADJ,N/P_RADJ, Normal mode    75HZ
    Set_LCD_8B_REG(0x2F,0x11); //Normal mode line inversion 11 or frame inversion 00
//Set_LCD_8B_REG(0x01,0x00); //IDLE='0', EXIT IDLE mode
 //Driving ability Setting
    Set_LCD_8B_REG(0xEA,0x00); //PTBA[15:8]
    Set_LCD_8B_REG(0xEB,0x20); //PTBA[7:0]
    Set_LCD_8B_REG(0xEC,0x0C); //STBA[15:8]
    Set_LCD_8B_REG(0xED,0xC4); //STBA[7:0]
    Set_LCD_8B_REG(0xE8,0x40); //OPON[7:0]
    Set_LCD_8B_REG(0xE9,0x38); //OPON1[7:0]
    Set_LCD_8B_REG(0xF1,0x01); //OTPS1B
    Set_LCD_8B_REG(0xF2,0x10); //GEN
    Set_LCD_8B_REG(0x27,0xA3); //
 
 //Gamma 2.4 Setting
    Set_LCD_8B_REG(0x40,0x01); //
    Set_LCD_8B_REG(0x41,0x00); //
    Set_LCD_8B_REG(0x42,0x00); //
    Set_LCD_8B_REG(0x43,0x10); //
    Set_LCD_8B_REG(0x44,0x0E); //
    Set_LCD_8B_REG(0x45,0x24); //
    Set_LCD_8B_REG(0x46,0x04); //
    Set_LCD_8B_REG(0x47,0x50); //
    Set_LCD_8B_REG(0x48,0x02); //
    Set_LCD_8B_REG(0x49,0x13); //
    Set_LCD_8B_REG(0x4A,0x19); //
    Set_LCD_8B_REG(0x4B,0x19); //
    Set_LCD_8B_REG(0x4C,0x16); //
    Set_LCD_8B_REG(0x50,0x1B); //
    Set_LCD_8B_REG(0x51,0x31); //
    Set_LCD_8B_REG(0x52,0x2F); //
    Set_LCD_8B_REG(0x53,0x3F); //
    Set_LCD_8B_REG(0x54,0x3F); //
    Set_LCD_8B_REG(0x55,0x3E); //
    Set_LCD_8B_REG(0x56,0x2F); //
    Set_LCD_8B_REG(0x57,0x7B); //
    Set_LCD_8B_REG(0x58,0x09); //
    Set_LCD_8B_REG(0x59,0x06); //
    Set_LCD_8B_REG(0x5A,0x06); //
    Set_LCD_8B_REG(0x5B,0x0C); //
    Set_LCD_8B_REG(0x5C,0x1D); //
    Set_LCD_8B_REG(0x5D,0xCC); //
//power setting

    Set_LCD_8B_REG(0x1B,0x1b); //VRH=4.8V
    Set_LCD_8B_REG(0x1A,0x01); //BT (VGH~15V,VGL~-10V,DDVDH~5V)
    Set_LCD_8B_REG(0x24,0x55); //VMH(VCOM High voltage ~3.2V)2f
    Set_LCD_8B_REG(0x25,0x53); //VML(VCOM Low voltage -1.2V)
//****VCOM offset**///
    Set_LCD_8B_REG(0x23,0x88); //for Flicker adjust //can reload from OTP
//Power on Setting
    Set_LCD_8B_REG(0x18,0x36); //I/P_RADJ,N/P_RADJ, Normal mode 50Hz
    Set_LCD_8B_REG(0x19,0x01); //OSC_EN='1', start Osc
    Set_LCD_8B_REG(0x01,0x00); //DP_STB='0', out deep sleep
    Set_LCD_8B_REG(0x1F,0x88);// GAS=1, VOMG=00, PON=0, DK=1, XDK=0, DVDH_TRI=0, STB=0
    delay(5);
    Set_LCD_8B_REG(0x1F,0x80);// GAS=1, VOMG=00, PON=0, DK=0, XDK=0, DVDH_TRI=0, STB=0
    delay(5);
    Set_LCD_8B_REG(0x1F,0x90);// GAS=1, VOMG=00, PON=1, DK=0, XDK=0, DVDH_TRI=0, STB=0
    delay(5);
    Set_LCD_8B_REG(0x1F,0xD0);// GAS=1, VOMG=10, PON=1, DK=0, XDK=0, DDVDH_TRI=0, STB=0
    delay(5);
//262k/65k color selection
    Set_LCD_8B_REG(0x17,0x05); //default 0x06 262k color // 0x05 65k color
//SET PANEL
    Set_LCD_8B_REG(0x36,0x02); //SS_P, GS_P,REV_P,BGR_P
    Set_LCD_8B_REG(0x01,0x02);
//Display ON Setting
    Set_LCD_8B_REG(0x28,0x38); //GON=1, DTE=1, D=1000
    delay(40);
    Set_LCD_8B_REG(0x28,0x3C); //GON=1, DTE=1, D=1100




//Set GRAM Area
    Set_LCD_8B_REG(0x02,0x00);
    Set_LCD_8B_REG(0x03,0x00); //Column Start
    Set_LCD_8B_REG(0x04,0x00);
    Set_LCD_8B_REG(0x05,0xEF); //Column End
    Set_LCD_8B_REG(0x06,0x00);
    Set_LCD_8B_REG(0x07,0x00); //Row Start
    Set_LCD_8B_REG(0x08,0x01);
    Set_LCD_8B_REG(0x09,0x3F); //Row End
    write_register(0x22); //Start GRAM write

 

[doraemon]

Hello!

With the only information "it's not working", I guess nobody can help you.
What is not working?
Did you compile it and you have an error?
Did you verify that your code corresponds to the chip of your LCD? By
the way, did you identify which chip it is? (that should be the very first step)
Did you verify the connections? I mean: if you write a chip select function
somewhere, does it indeed drop the CS of the LCD?
Do that for all the LCD pins, and then it might work better.

Dora.

 

[shreyas_patel21]

hi Dora,

Its not working means, there is no display on LCD.
I did not have error in code.
the driver chip of LCD MTF0280QN-18 is HX8347D, I found it on site **broken link removed**

I tried to read driver ID from LCD it is not receiving 47 as per datasheet.
I observed datalines in signal tap, it is proper as per datasheet.
I have verified connection of all lines.


Thank you.,
regards
shreyas.