急！NT7532驱动的液晶不显示！！

只看该作者 · 2008-6-11 16:24

大家好，这几天在调试一个液晶模块YJG-12864F，驱动芯片是NT7532,结果就是不显示，液晶一点反应都没有，着急，希望使用过的人给与指点，谢谢！要是有人愿意帮忙，我再把电路图跟程序贴上来！

只看该作者 · 2008-6-25 12:03

//-------------------------------------------------------------------------------------
//initialise the LCD module
//--------------------------------------------------------------------------------------
void lcd_ini(void)
{
   nRST = 0;
   delay(1000);                                // wait for the power stablised
   nRST = 1;
   //lcd_setting(display_on);
   //lcd_setting(0xa4);                        // normal "H"
   lcd_setting(bias);                        // set the 1/9 bias voltage
   lcd_setting(ADC_NOM);
   lcd_setting(SCAN_NOM);                    // set the scan direction
   lcd_setting(ratio);                        // set the ratio (1+Ra/Rb)=5;
   lcd_setting(mode_enable);                // enable V0 setting
   lcd_setting(coffient);                    // set the a=53;
   lcd_setting(pwr_control);                // open all power source
   lcd_setting(display_on);
   //lcd_setting(display_off);                // test the lcd

}

//-----------------------------------------------------------------------------------------
//CLEAR LCD module
//-------------------------------------------------------------------------------------------
void    clear_lcd(void)
{
   uchar i,page;
   for(page=0xb0;page<0xb8;page++)
   {
     lcd_setting(page);
     lcd_setting(0x10);
     lcd_setting(0);
     for(i=0;i<132;i++)
     lcd_write(0);
   }
}

//------------------------------------------------------------------------------------
//LCD module bais setting
//--------------------------------------------------------------------------------------
void    lcd_setting(uchar control_byte)
{

   //nRD = 1;
   A0 = 0;
   delay(1);
   nRW = 0;
   delay(1);
   nRD = 1;
   delay(1);
   LCD_REG = control_byte;
   delay(1);
   nRD = 0;
   delay(1);
   nRW = 1;
   delay(1);
   A0 = 1;
}

//--------------------------------------------------------------------------------------
//LCD display settings
//---------------------------------------------------------------------------------------
void    display_setting(void)
{
    lcd_setting(com0);
    lcd_setting(page1);
    lcd_setting(0x10);                          // set the colum address
    lcd_setting(0x0);

}

//-------------------------------------------------------------------------------------
//LCD WRITE
//--------------------------------------------------------------------------------------
void    lcd_write(uchar lcd_dat)
{

   //nRD = 1;
   A0 = 1;
   delay(1);
   nRW = 0;
   delay(1);
   nRD = 1;
   delay(1);
   LCD_REG = lcd_dat;

   delay(1);
   nRD = 0;
   delay(1);
   nRW = 1;
   delay(1);

}
//------------------------------------------------------------------------------------
//LCD WRITE DATA
//-----------------------------------------------------------------------------------
void    write_data()
{
   uchar i;
   uchar temp;
   for(i=0;i<120;i++)
   {
     temp = * ( LCD_DAT1 + i );
     lcd_write(temp);
   }
   lcd_setting(page0);
   lcd_setting(0x10);                          // set the colum address
   lcd_setting(0x0);
   for(i=0;i<120;i++)
   {
     temp = * ( LCD_DAT2 + i );
     lcd_write(temp);
   }
}

只看该作者 · 2008-6-26 10:35

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急！NT7532驱动的液晶不显示！！

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