Hello,

I am Raksha. I am using LPC1788 microcontroller with emwin.



Configuration:

- 7"LCD (800 X 480) configured for 16bit colour (GUICC_M565), External SDRAM, operating frequency = 108MHz, pclk = 108/2

- used GUI_MEMDEV_Handle



Error:

- When I use GUI_WHITE color, then the microcontroller enters in hard fault error

- actually whenever I use 8 bit colour value between 0 toff, no error (GUI_BLACK = 0, GUI_RED = 0xff), but when I use any other color value whose value is greater than ff, then hardfault error is observed

- tried reducing operating clock



Following is my test code:

void SeggerLCDTest(void);



main()

{

....

MCU_Init();

....

GUI_Init();

GUI_Clear();

GUI_SetBkColor(GUI_WHITE); // Error due to this, if I change this to GUI_RED, no error is observed.

GUI_SetColor(GUI_BLACK);

GUI_SetFont(&GUI_Font8X16);

GUI_Clear();

GUI_DispStringAt("Hello World\n", 0, 0);



while(1)

{

SeggerLCDTest();

DelayMs(500);



GUI_Exec();

}

}



void SeggerLCDTest(void)

{

static GUI_MEMDEV_Handle hMem = 0;



if (!hMem )

{

hMem = GUI_MEMDEV_Create(0, 0, 800, 480);

GUI_MEMDEV_Select(hMem);

}

GUI_DispDecAt(timer0_cntr, 100, 140, 5); // timer0_cntr is a global variable incremented every 1ms in 1ms isr



GUI_MEMDEV_Select(hMem);

GUI_MEMDEV_CopyToLCD(hMem);

}



kindly give suggestions on the same.


Thank you,