Need help to correctly setup USB on PIC18F67J50

[DiegoGarcia]

So I forced to enable the pplen !

#bit PLLEN = 0xf9b.6
void main()
{
PLLEN = 1;

}

It works like a charm ;)

Thanks for the great help Ttelmah :D

Regards,
Diego Garcia

[Ttelmah]

OK. OSC_PLL_ON, has existed for several versions. Typically, when it appeared, is not shown in the CCS 'changes' list. I'd guess about 4.060.
At least you have a solution. :-)

Best Wishes

[bwhiten]

Diego,
I may have to move to this USB PIC from a 18F2553 to get the extra memory I need for my product.
How has your development gone using CCS on this PIC?
Does the compiler seem to have most of the functions working outside the oscillator issue you brought up here?
Thanks for any comments.

[DiegoGarcia]

Hi bwhiten,
For now its all working nice.

I think this topic will help you and many others to correct setup ;)

After the usb module is working its easy.

Regards,
Diego Garcia

[bwhiten]

Thanks for the update. Can you give me a quick idea of what other functions you have implemented, like SPI or I2C or A/D, etc. in this PIC and what compiler version you are running now?

I also wonder if the H4_SW fuse instead of HS fuse would set the PLL on for you?

[DiegoGarcia]

Right now I me using just the SPI, but the other features should work fine since it doesnt seens to be changed.

The H4_SW fuse works nice to but remember that you should set the PLLEN like I've done or it will not work to !

#bit PLLEN = 0xf9b.6
void main()
{
PLLEN = 1;

//The rest of your code here

}

Regards,
Diego Garcia

[bwhiten]

Diego,
What value of Cf did you use for VDDcore? I believe the value I have is too small at 0.47uF . I finally found in the programming guide a range of 1uF to 10uF. Hopefully this is why my programmer is not seeing this device at present.