12F1840 config issues

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- 10th February 2015, 19:38
enigma

12F1840 config issues

Hi All
I searched for an answer to this but came up blank. The program has been reduced to a single serout2 command to test. It works fine on both a 12F683 and 16F688 with the correct configs but I cant seem to get it to function on the 12F1840. There is data out but its garbage and clearly the wrong baud rate. I suspect I have not configured something, probably the oscillator correctly so requesting help. Its probably obvious but I cant spot it.
Cheers Pete

Code: PBP3

Code:

#CONFIG __CONFIG _CONFIG1, _FOSC_INTOSC & _WDTE_ON & _PWRTE_ON & _MCLRE_ON & _BOREN_OFF __CONFIG _CONFIG2, _PLLEN_ON & _BORV_LO & _LVP_OFF #ENDCONFIG OPTION_REG = %10000001 WPUA = %00000000 'weak pull ups disabled ANSELA = %00000000 'Select all digital TRISA = %00001101 ' Make A0,A2,A3 inputs,A1,A4,A5 outputs OSCCON = %11110000 'SET INTOSC TO 32MHZ OSCTUNE = %00000000 INTCON = 0 'Latch out interrupt CM1CON0 = 0 'disable comparators FVRCON = 0 'Fixed voltage reference disabled DEFINE OSC 32 Test: serout2 PORTA.5,16468,["Testing",13,10] pause 1000 goto Test
- 10th February 2015, 20:55
Acetronics2

Re: 12F1840 config issues

Hi Enigma

Code:

' Config '******************************************************************************* #IF __PROCESSOR__ = "12F1840" #CONFIG __CONFIG _CONFIG1, _FOSC_INTOSC & _WDTE_OFF & _PWRTE_ON & _MCLRE_OFF & _CP_OFF & _CPD_OFF & _BOREN_ON & _CLKOUTEN_OFF & _IESO_OFF & _FCMEN_OFF __CONFIG _CONFIG2, _WRT_ALL & _PLLEN_ON & _STVREN_OFF & _BORV_LO & _LVP_OFF #ENDCONFIG #ELSE #MSG "Wrong Processor selected!" #ENDIF '***************************************************************************** 'Includes '***************************************************************************** INCLUDE "DT_INTS-14-2k.bas" INCLUDE "ReEnterPBP.bas" ASM INT_LIST macro ; IntSource, Label, Type, ResetFlag? INT_Handler TMR1_INT, _ClockCount, PBP, yes endm INT_CREATE ; Creates the interrupt processor ENDASM INTCON.7 = 0 ' Pour ètre sur !!! '******************************************************************************* ' Ports init TRISA = 0 PORTA = 0 LATA = 0 NeoPinW1 VAR LATA.0 NeoPinW2 VAR LATA.1 NeoPinR VAR LATA.2 '******************************************************************************* ' Chip Initialization OSCCON = %11110000 ' 8 Mhz internal x 4 OSCTUNE = %00000000 ' Internal osc Adjustment WHILE !OSCSTAT.3 ' Wait for stable OSC ... WEND INTCON = 0 CPSCON0 = 0 CPSCON1 = 0 ADCON0 = 0 ADCON1 = %10000000 ANSELA = 0 CCP1CON = 0 CM1CON0 = 0 DACCON0 = 0 FVRCON = 0 ' Timer 1 T1CON = %00110101 ' Preload @ 15536, PS=8, run T1GCON = 0 INTCON = %11000000 PIE1 = %00000001 PIR1 = 0

This config works ...

But I remember It was somewhat tricky ...

I think this

Code:

WHILE !OSCSTAT.3 ' Wait for stable OSC ... WEND

made the chip run fine ...

Alain
- 11th February 2015, 14:12
Charlie

Re: 12F1840 config issues

Your clock setup looks fine, but you can always do a blink test to confirm.
However, what baud rate are you trying to achieve? 16468 seems to be about 60 baud by my calculations?
- 11th February 2015, 15:09
Dave

Re: 12F1840 config issues

It looks like 9600 baud by my calculations w/ open wire mode enabled. As far as the config's go everything looks good. Here is my config's for a Waterstick I designed and works great.

Code:

DEFINE OSC 32 #CONFIG ;----- CONFIG1 Options -------------------------------------------------- __config _CONFIG1, _FOSC_INTOSC & _WDTE_OFF & _PWRTE_ON & _MCLRE_OFF & _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 = %00001111 'INITIALIZE PORT DIRECTIONS OSCCON = %11110000 'PLL ENABLED,8Mhz,FSOSC<2:0> 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 = %00000011 'AN0:AN1 ANALOG,AN2:AN4 DIGITAL I/O CPSCON0 = %11001100 'ENABLE CAP SENSE,DAC/FVR,HIGH RANGE WPUA = %00001100 'WEAK PULLUP'S OFF, EXCEPT A.2,A.3 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
- 11th February 2015, 16:34
enigma

Re: 12F1840 config issues

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
- 12th February 2015, 09:36
enigma

Re: 12F1840 config issues

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

Code:

: #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
- 12th February 2015, 14:00
Charlie

Re: 12F1840 config issues

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.
- 12th February 2015, 14:30
HenrikOlsson

Re: 12F1840 config issues

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.
- 12th February 2015, 18:12
enigma

Re: 12F1840 config issues

Yes 9600 inverted and the same line works correctly on other PIC types I have tried, its only with the 12F1840 it doesnt
- 12th February 2015, 19:37
amgen

Re: 12F1840 config issues

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
- 12th February 2015, 20:55
Archangel

Re: 12F1840 config issues

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.
- 13th February 2015, 07:34
enigma

Re: 12F1840 config issues

Hi All

I LED on the same pin configured to blink once per second, does just that so I am pretty sure some configs are right. I`ll try the last suggestions and see before I put in a support message. Many thanks for all the help! Cheers Pete
- 14th February 2015, 10:29
Archangel

Re: 12F1840 config issues

Hi Pete,
Do you think trying to use timer 1 and trying to output serial data on T1 Clkin pin might be in conflict? I don't know, just sayin' . . . Have you tried using another pin, say RA1?
- 15th February 2015, 07:49
enigma

Re: 12F1840 config issues

That's possible, I am not using timer 1 though so I will look to disable it. Unfortunately this is a PIC upgrade from a 12F683 so I am stuck with using the same pins for this app. I've sent a support question to MELabs and I`ll post the findings. Many thanks!