Can't set 38400 baud @ 48Mhz

[Andre_Pretorius]

No, 48M cristal with define osc 48

[Darrel Taylor]

The highest crystal frequency you can use on an 18F4550 is 25Mhz (24 if using the PLL).

If it's a TTL Oscillator, then it's possible to put 48Mhz directly into the PIC with EC mode. But XT or HS modes cannot drive a 48Mhz crystal.

The configs you showed are set up for a 20Mhz crystal.

[b1arrk5]

Also, SPBRG 77 is the value if SPBRGH = 0, since you have SPBRGH set to 1, then SPBRG should be 56.

Jerry