18F2520 Oscillator settings

[superbrew]

Hello, I am trying to use an 18F2520 with a GLCD and it seems to be running really slow. The GLCD fill command takes about 5-7 seconds to finish. Here is the code that I am using with the mikroC compliler.

void main()
{
     TRISA = 0xff;
     TRISB = 0x00;
     TRISC = 0x00;
     PORTB = 0x00;
     PORTC = 0x00;
     ADCON1 = 0x0f;
     OSCCON = 0x07;
     OSCTUNE = 0x40;
     
     Glcd_Init(&PORTC,1,0,2,4,6,5,&PORTB);
     Glcd_Fill(0);
     Glcd_Set_Font(FontSystem5x8, 5, 8, 32);
     Glcd_Write_Text("TEST",0,0,1);
}

I am also using the default project fuses. Thanks

 

[blueroomelectronics]

What crystal are you using?

 

[Pommie]

Doing OSCCON = 0x07 selects the internal oscillator at 32kHz. Try OSCCON = 0x72 for the internal 8MHz clock or OSCCON = 0x00 if you have an external crystal. If you have an external crystal then you may have to set the fuses appropriately.

Mike.

 

[superbrew]

Unbelievable!
The OSCCON was supposed to be set to 0x70, not 0x07. Thanks so much for noticing that.

It works perfectly now, thanks.

 

[Pommie]

It's amazing how often the error is a simple typo but almost impossible to spot without a fresh set of eyes.

Mike.