Can't set 38400 baud @ 48Mhz

[b1arrk5]

Hi guys,

After speaking with the nice folks at MeLabs I have the following explanation, the warning is due to the fact that PicBasic defaults to 2400 baud, and I had the oscillator set to 48Mhz, which it can't do with the high speed baud generator register set. I was close, I could get it to compile without the warning, but the baudrate wasn't right. The following code works perfectly now;

BAUDCON.3 = 1 'SETUP FOR HIGH SPEED.
DEFINE HSER_RCSTA 90H
DEFINE HSER_TXSTA 24H 'HIGH SPEED MODE BAUD RATE GENERATOR
DEFINE HSER_BAUD 38400
DEFINE HSER_SPBRG 38H '38400 BAUD *** THIS WORKS! ***
DEFINE HSER_SPBRGH 01H

Thanks,

Jerry.

Thanks for all your help!

[Darrel Taylor]

Isn't that what Steve and I said in Post #24 and 23?

[b1arrk5]

I'm sorry, I should have made it more clear, that was why I posted the 'solution,' so that you and Steve would know that you were indeed right! More importantly, you guys were available and willing to help out on the weekend, which is when I have uninterrupted time to work, as opposed to during the week when the phone rings incessantly. Have a great weekend!

Jerry.

[Darrel Taylor]

Oh, woops. Now I get it.

Woohoo.

[Andre_Pretorius]

Hi there
Can someone please help i am trying to upgrage one of my projects to a 18F4550 but it is turning into a nigtmare, for some reason i can not get my serial port to work
Any help would be appreciated

ps I have downloaded the patch for 2.46 but it seems not to help

my 18F4550.inc file

  NOLIST
    ifdef PM_USED
        LIST
        "Error: PM does not support this device.  Use MPASM."
        NOLIST
    else
        LIST
        LIST p = 18F4550, r = dec, w = -311, w = -230, f = inhx32
        INCLUDE "P18F4550.INC"	; MPASM  Header
        __CONFIG    _CONFIG1L, _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L  
	__CONFIG    _CONFIG1H, _FOSC_HSPLL_HS_1H & _FCMEN_OFF_1H & _IESO_OFF_1H 
	__CONFIG    _CONFIG2L, _PWRT_ON_2L & _BOR_ON_2L  & _BORV_2_2L  & _VREGEN_ON_2L   
	__CONFIG    _CONFIG2H, _WDT_OFF_2H 
	__CONFIG    _CONFIG3H, _MCLRE_ON_3H & _LPT1OSC_OFF_3H & _PBADEN_OFF_3H & _CCP2MX_ON_3H 
	__CONFIG    _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _ICPRT_OFF_4L  & _XINST_OFF_4L & _DEBUG_OFF_4L 
       
        
        NOLIST
    endif
        LIST
EEPROM_START	EQU	0F00000h
BLOCK_SIZE	EQU	32

And my setup i am running a 48M cristal

'*Serial port Setup 3800 8N1*
BAUDCON.3 = 1 'SETUP FOR HIGH SPEED.
DEFINE HSER_RCSTA 90H
DEFINE HSER_TXSTA 24H 'HIGH SPEED MODE BAUD RATE GENERATOR
DEFINE HSER_BAUD 38400
DEFINE HSER_SPBRG 77 ' 38400 Bauds
DEFINE HSER_CLROERR 1

[Darrel Taylor]

And my setup i am running a 48M cristal

Ummm, you mean you are running a 20mhz crystal, with DEFINE OSC 48?

I Hope.

[Andre_Pretorius]

No, 48M cristal with define osc 48