Hserout sends wrong values

[picmilan]

Hello again,
I have a working code for sending a byte using PIC18F24J50 but the same code doesn't send the correct values in PIC18F2450. I send $05 and receive 252 instead.

Here is my code:

DEFINE LOADER_USED 1
DEFINE HSER_RCSTA 90h
DEFINE HSER_TXSTA 24h
DEFINE HSER_BAUD 115200
DEFINE HSER_SPBRG 12 
DEFINE HSER_CLOERR 1
DEFINE OSC 24

ADCON0 = 000000
ADCON1 = 001011
ADCON2 = 110101

TRISC.0 = 0
TRISC.1 = 1
TRISC.6 = 0
TRISC.7 = 1


tx1 VAR PORTC.6
rx1 VAR PORTC.7
   
LED VAR PORTC.0  
Pause 1000

mainloop:

   high LED
   Pause 1000 

  Hserout [$05] 
   Pause 100
   
    low LED
   Pause 1000 

   Goto mainloop

Any ideas? Thanks!

[picmilan]

I also get 50 when I set HSER_TXSTA to 20h in low speed.

[mackrackit]

Are both chips running at the same speed?

[richard]

config is ?

[picmilan]

I am using standard config in P18F2450.INC file.

        NOLIST
    ifdef PM_USED
        LIST
        "Error: PM does not support this device.  Use MPASM."
        NOLIST
    else
        LIST
        LIST p = 18F2450, r = dec, w = -311, w = -230, f = inhx32
        INCLUDE "P18F2450.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    _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H
        __CONFIG    _CONFIG3H,_PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _MCLRE_ON_3H
        __CONFIG    _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _BBSIZ_BB1K_4L & _XINST_OFF_4L
        NOLIST
    endif
        LIST
EEPROM_START    EQU    0F00000h
BLOCK_SIZE    EQU    16

I basically trying to read the result using an arduino.


Here are sample of values I sent and values I get when I use Putty/Serial software :

Sent Received 
0     1
1     2
2    12
3    14
4    48
5    50
6    60
7    62
8    192
9    194
10    204

[richard]

xtal used is ?

[picmilan]

xtal used is ?

It's a 24 mhz xtal.

[richard]

the default config is for a 20mhz xtal which gives a fosc of 48mhz

to use a 24 MHz xtal change plldiv to 6 for a 48mhz fosc or turn the pll off .
24 mhz into the pll @ plldiv5 is out of device specs.
with pll off and cpudiv=1 fosc=24mhz fo a 24mhz xtal.