12F1840 config issues

[enigma]

Many thanks, I will run through these and see. These seem tricky beasts to set up and I am sure I have probably not set something I need to. Will report back! Cheers Pete

[enigma]

I now have the code below. The serial data appears to come out at intervals of one second but is complete garbage still. Replacing the PIC with an appropriately configured 12F683 all functions fine. I am wondering if anyone else can replicate a serout2 on the 12F1840 and see if its the same. If the code looks good I am wondering if its a problem with PBP?. Cheers Pete

:
#CONFIG
 ;----- CONFIG1 Options --------------------------------------------------
 __config _CONFIG1, _FOSC_INTOSC & _WDTE_OFF & _PWRTE_ON & _MCLRE_ON & _CP_OFF & _CPD_OFF & _BOREN_ON & _CLKOUTEN_OFF & _IESO_ON & _FCMEN_ON

 ;----- CONFIG2 Options --------------------------------------------------
 __config _CONFIG2, _WRT_OFF & _PLLEN_ON & _STVREN_ON & _BORV_19 & _LVP_OFF
 #ENDCONFIG

 ' ************************************************** ******************
 ' SYSTEM INITIALIZATION
 ' ************************************************** ******************
 clear
 'PORTA = %00000000
 TRISA  = %00001101	   ' Make A0,A2,A3 inputs,A1,A4,A5 outputs
 OSCCON = %11110000 'PLL ENABLED,8Mhz,FSOSC<2:0>
 OSCTUNE	= %00000000	' Internal osc Adjustment
WHILE !OSCSTAT.3	' Wait for stable OSC ...
WEND
 INTCON = %00000000 'CLEAR GIE,PEIE,TMR0IE,INTE,RBIE,TMR0IF,INTF,RBIF
 PIE1 = %00000000 'CLEAR ALL INTERRUPT ENABLE BITS
 PIR1 = %00000000 'CLEAR ALL INTERRUPT FLAGS
 PIE2 = %00000000 'CLEAR ALL INTERRUPT ENABLE BITS
 PIR2 = %00000000 'CLEAR ALL INTERRUPT FLAGS
 APFCON = %00000000 'ALL DEFAULTS
 ANSELA      = %00000000    'Select all digital
 CPSCON0 = %11001100 'ENABLE CAP SENSE,DAC/FVR,HIGH RANGE
 WPUA		= %00000000    'weak pull ups disabled
 ADCON0 = %00000000 'CHS2:0,GO/DONE,ADOFF
 ADCON1 = %11100000 'RIGHT JUSTIFIED,FOSC/64,VSS,VDD
 SRCON0 = %00000000
 SRCON1 = %00000000
 CM1CON0 = %00000000 'CLEAR/DISABLE COMPARATOR
 CM1CON1 = %00000000 'CLEAR/DISABLE COMPARATOR
 CMOUT = %00000000 'DISABLE OUTPUT REGISTER
 DACCON0 = %11001000 'ENABLE DAC,ENABLE POS REFERENCE,SOURCE IS FVR
 DACCON1 = %00001000 'SET FOR 1/4 SCALE (8) ~ 1.024
 FVRCON = %10001100 'ENABLE VOLTAGE REFERENCE,4,096
 OPTION_REG = %00000000 'INTEDG,T0CS,T0SE,PSA,PS
 T1CON = %11000001 'CAPOSC INPUT,PRESCALER 1/1,START TIMER 1
 T1GCON = %00000000 'NO GATE CONTROL
 T2CON = %00000000 'POSTSCALER 1/1,STOP,PRESCALER 1
 TMR2 = 0 'CLEAR TMR2 MODULE REGISTER
 PR2 = 255 'SET PERIOD ((((1 / 32,000,000)*4) * 1 PRESCALE) * (1+255 PR2)) = 31.25 KHZ.
 CCP1CON = %00000000 'PLACE CCP1 INTO DISABLE MODE
 CCPR1L = $00 'CLEAR CCP1 LOWER 8 BITS
 CCPR1H = $00 'CLEAR CCP1 UPPER 2 BITS
 PSTR1CON = %00000001'DEFAULT 
 FVRCON		= 0            'Fixed voltage reference disabled

DEFINE OSC 32

initialise:
serout2 PORTA.5,16468,["Waiting for X200",13,10]
pause 1000
goto initialise

[Charlie]

I guess SEROUT2 has changed for PBP3, because in PBP 2.6, the number 16468 is definitely wrong.
Anyway, are you seeing any characters correctly? If so, you may need to put a pause between characters. I needed to do this with the 1840 talking to some devices.
The clock may also be slightly off, causing some characters to get messed up.

[HenrikOlsson]

According to the manual 16468 would be 9600, driven, inverted, no parity. Bit 15 is set which means driven, bit 14 says inverted, bit 13 says no parity. The rest of the bits says 84 which according to the formuala (1000000 / baud - 20) should result in 9600 baud.

/Henrik.

[enigma]

Yes 9600 inverted and the same line works correctly on other PIC types I have tried, its only with the 12F1840 it doesnt

[amgen]

if you cant check clock with frequency meter.......... add in loop once per second (on serout) increment or decrement osctune to see if characters come in view then try to figure about how far off and in what direction (raise/lower freq)
amgen

[Archangel]

Try Turning off the fail safe clock monitor, if I understand correctly it monitors an EXTERNAL clock. . .
I would TRY altering bit 1 in OSCON just to see if it has any effect . . .

I would add to config1
_IESO_OFF ; Internal/External Switchover mode is disabled

and I would disable WDT while troubleshooting at least once to judge if it has any effect.

Oh yes, I would make a blinky program to test my configs without any serouts . . . a stopwatch using a blinky will give you a rough idea as to whether or not you are running at expected OSC speed.