No program response, including config instructions

[MillicentBear]

I have been testing a program for a 12F683 to drive an RC servo. The compiler is Picbasic Pro ver 3 and both QL 200 and IDE 2 programmers give the same result. The programmed chip does nothing. Reducling the program to a simple loop turning a pin on and off with config setting Clk Out on pin 4, the analyser shows the clk operating at the default 4MHz instead of the config set 8MHz. After many hours and much reading of the datasheet and so on, no result. I sense the problem lies with the configuration statements, but even with only those in the .INFO file there is no response.

Has anyone a suggestion on what direction to go?

[pedja089]

First post your code here...
Clkout is FOSC/4, so OSC is set to 8MHz, you should get 2MHz on pin.

[MillicentBear]

Analyser shows the clock "ticking" at 1MHz, corresponding to the default 4MHz/4, not the 2MHz I intended to set.

The analyser shows GPIO.5 going Hi and staying there until the power is turned off.

Power is 3 x 1.5 AA cells.




Code is:

' Name : 12F683 Simplex Test
' Circuit :
'


' Description : PICBASIC Program to Test 12F673 config & set up statements


' Circuit :


' Hardware :
'
' Target PIC : 12F683
' Pins : 8
' Compiler : PICBASIC PRO Compiler 2.6
' Assembler : MPASM
'
' Oscillator : Internal 1 MHz
'
' ************************************************** ****************************
' Comments
' Functions:
' Inputs



' Outputs
' Pulde pin GPIO.5




'
' ************************************************** ****************************
' Initialise
' CONFIG Register
' Notes:
' Config directive options are in PIC12F683.INFO in C:\PB3\Device_Reference
' Format example is:
' cfg1 = _INTOSC ; Oscillator
' cfg1 = sfg1 $ _WDT_OFF ; Watchdog timer
' and so on, thus keeing lines short

' config1 for bits 0-7 of the config word, config2 for 8-15

' config1
' Oscillator
' cfg1 = _INTOSCIO ; INTOSCIO osc I/O on RA4/OSC2/CLKOUT
; RA5/OSC1/CLKIN

' Watchdog timer disabled
' cfg1 = cfg1 & _WDT_OFF ;WDT disabled

' Power-Up timer enabled
' cfg1 = cfg1 & _PWRTE_ON ;PWRT enabled

' MCLR Function is internal
' cfg1 = cfg1 & _MCLRE_OFF ;MCLR is input, MCLR int tied to VDD

' Code Protection OFF
' cfg1 = cfg1 & _CP_OFF ;Prog mem code protection is disabled

' Data code protection OFF
' cfg1 = cfg1 & _CPD_OFF ;Data memory code protection disabled


' config bits 8-15
' Brown-Out detect enabled
' cfg1 = cfg1 & _BOD_ON ;BOR enabled

' Internal Switchoover disabled
' cfg1 = cfg1 & _IESO_OFF ;Int Ext Switchover mode disabled

' Failsafe Clock disabled
' cfg1 = cfg1 & _FCMEN_OFF ;Fail-Safe Clock Monitor is disabled


' Statement to write CONFIG WORD bits 0-15
' __CONFIG _CONFIG1, cfg1

#CONFIG

cfg1 = _INTOSCIO
cfg1 = cfg1 & _WDT_OFF
cfg1 = cfg1 & _PWRTE_ON
cfg1 = cfg1 & _MCLRE_OFF
cfg1 = cfg1 & _CP_OFF
cfg1 = cfg1 & _BOD_ON
cfg1 = cfg1 & _IESO_OFF
cfg1 = cfg1 & _FCMEN_OFF
dgg1 = cfg1 & INTOSC


__config cfg1

#ENDCONFIG
'
' Power control - PCON register
' Bit 0 Brownout Reset Status - Reset in software after Power-On or BOR
' Bit 1 POR Status - Reset in software after Power-On
' Bit 2 and 3 unimplemented

' Bit 4 Software BOR enable = 1
PCON.4 = 1

' Bit 5 ULPWUE Ultra low power wake up = 0
PCON.5 = 0

' Bit 6 and 7 unimplemented


' Define oscillator configuration 8MHz internal bits 6-4 = 111
OSCCON.6 = 1
OSCCON.5 = 1
OSCCON.4 = 1

' A to D Off - set bit 0 = 0
ADCON0 = 0

' All comparators off - Bits 0-2 111
CMCON0.0 = 1
CMCON0.1 = 1
CMCON0.2 = 1

' Set all pins digital
ANSEL = 0

' Internal Pull-Ups off
' OPTION_REG bit 7 = 0
OPTION_REG.7 = 0

' UPU bits 0 -2, 4-5 = 0
WPU.0 = 0
WPU.1 = 0
WPU.2 = 0
WPU.4 = 0
WPU.5 = 0

' Set TRISIO and outputs to 0 on boot
' GPIO.0 = Output
TRISIO.0 = 0
GPIO.0 = 0
'GPIO.5 = Input
TRISIO.5 = 1

' Set unused pins as output (but GPIO.3 must be input)
TRISIO.1 = 0
GPIO.1 = 0

TRISIO.2 = 0
GPIO.2 = 0

TRISIO.3 = 1

TRISIO.4 = 0
GPIO.4 = 0


TRISIO.5 = 0
GPIO.5 = 0

' ************************************************** ****************************
' Variables etc
' Alias's and variables
PulsePin VAR GPIO.5 ' Output


' Counters
I VAR WORD




' ************************************************** ***************************
' Main Loop
MainLoop:


' Turn PulsPin On
PulsePin = 1


' Pause
PAUSE 50


' PulsePin Off
PulsePin = 9


' Back to MainLoop
GOTO MainLoop




'************************************************* ***************
End

[MillicentBear]

Addendum to my post with code included. Line 176 should read "PulsePin = 0" A typo in my transferring the code. Sorry.

[richard]

#CONFIG

cfg1 = _INTOSCIO
cfg1 = cfg1 & _WDT_OFF
cfg1 = cfg1 & _PWRTE_ON
cfg1 = cfg1 & _MCLRE_OFF
cfg1 = cfg1 & _CP_OFF
cfg1 = cfg1 & _BOD_ON
cfg1 = cfg1 & _IESO_OFF
cfg1 = cfg1 & _FCMEN_OFF
dgg1 = cfg1 & INTOSC this will never compile


__config cfg1

#ENDCONFIG

that's PulsPin =1 for 50000uS an 0 for maybe 2uS , somehow I doubt that's your intent

MainLoop:


' Turn PulsPin On
PulsePin = 1


' Pause
PAUSE 50


' PulsePin Off
PulsePin = 9


' Back to MainLoop
GOTO MainLoop

try this , I have removed all the code and comments that serve no purpose

 ' Hardware :
 '
 ' Target PIC : 12F683
 ' Outputs
 ' Pulse pin GPIO.5

 #CONFIG
cfg1 = _INTOSCIO
cfg1 = cfg1 & _WDT_OFF
cfg1 = cfg1 & _PWRTE_ON
cfg1 = cfg1 & _MCLRE_OFF
cfg1 = cfg1 & _CP_OFF
cfg1 = cfg1 & _BOD_ON
cfg1 = cfg1 & _IESO_OFF
cfg1 = cfg1 & _FCMEN_OFF
 __config cfg1
 #ENDCONFIG
 
 
 DEFINE NO_CLRWDT 1 'Forces manual use of CLRWDT   since you have wdt is turned off in config
 DEFINE     OSC 8         ;missing
 ' Define oscillator configuration 8MHz internal bits 6-4 = 111    
 OSCCON = $70

 ' All comparators off - Bits 0-2 111
 CMCON0 = 7
 ' Set all pins digital
 ANSEL = 0
 
 ' Set TRISIO and outputs to 0 on boot
 GPIO = 0 
 TRISIO = %011111  ;  gpio.5 o/p the rest are i/p  since only gpio.5 used
 
 ' ************************************************** ****************************
 ' Variables etc
 ' Alias's and variables
 PulsePin VAR GPIO.5 ' Output
 

 ' ************************************************** *************************** 
 ' Main Loop
 MainLoop:

 ' Turn PulsPin On
 PulsePin = 1

 ' Pause
 PAUSE 50

 ' PulsePin Off
 PulsePin = 0
  PAUSE 50  ; I believe to be missing
 ' Back to MainLoop
 GOTO MainLoop
 

 '************************************************* ***************
 End

[MillicentBear]

Richard,

Thank you very much for a very helpful reply.

dgg1 was of course a typo - being too clever in the (adjusted) cut & paste process. Ditto for the missing Pause 50. I did intend the pause to be 50mSec - simply for ease of viewing in this "get it going" test version. In the servo drive version the pulse is 1.5 - 2 mSec and a period of 20 mSec.

As I read your version, you have confirmed my suspicion my problem lay in the config and other statements above the program proper start line. My original effort(s) expressed OSCCON, TRISIO and so on in the form you have, but I tried setting one bit at a time to be sure (in my mind) I was not accidentally setting bits I did not intend. I shall reveret to your format.

From your version my suspicion is focused on my missing the DEFINE NO_CLRWDT 1. I did not see that in any of the material fi found on WDT.

Anyway, I shall try this as soon as I can and report back

Thanks again

(PS The comment "This is better than free to air TV is undoubtedly true. Well, I think it is, but the compiler rejected it when accidentally included in the program, so perhaps there is some doubt?)

[richard]

From your version my suspicion is focused on my missing the DEFINE NO_CLRWDT 1

your suspicion is totally unfounded . i assumed you had a "valid" reason for not using the WDT
[DEFINE NO_CLRWDT 1 ] simply stops the compiler adding unnecessary CLRWDT commands to the resulting code
and potentially wasting code space .

to get the best possible results from the forum you need to post the actual code you are using {in code tags}
not some hacked up version full of typo's .


when it comes to programing rubbish in ..... rubbish out , and just 1 bit can do it

[MillicentBear]

Richard,

Thanks for your comments. We are not all perfect, but I shall try to do better next time re typos. .

I copied by cut and paste then compiled your code exactly as you sent it.

The result was the same. No reaction from the Pic. Nor from five of its mates. So unless I have a bad batch of Pics, as you say I have one bit of rubbish that is preventing the program working. Since the body of the program is so simple this suggests the rubbish is somewhere above that.

Attached is a sample screen shot from the analyser. The power supply is on channel 7 (Purple) and the expected output on channel 6 (Blue). The trigger is channel 7.

The output shows a single short output pulse when the power comes on, then a delay of about 2.5 seconds before going High. Then nothing until the power is turned off. Collecting a sample for longer is just the same - the shift Low of the output pin just moves out to when the power is turned off.

An suggestions please?

[richard]

when I pgm chip with pickit2 I get this.
the problem is not the code .

[MillicentBear]

Richard,

Thanks for the prompt reply.

In some ways it is a relief to know it is not the code. That is a big step forward.

As per my first post I had tried two different programmers, both from the same origin. I also tried an older version of MPLAB (which I had had programming success) and a download of the latest version. No success with any combination.

I shall wend my way carefully and methodically through re-installation and settings again, including trying the job on the (retired) 32 bit PC that previously yielded success. All while I wait for delivery of a new programmer I ordered on suspicion.

I really am getting too old for all this. In retirement things are supposed to go smoothly!

Thanks again for your help.

[andywpg]

I have been testing a program for a 12F683 to drive an RC servo. The compiler is Picbasic Pro ver 3 and both QL 200 and IDE 2 programmers give the same result. The programmed chip does nothing. Reducling the program to a simple loop turning a pin on and off with config setting Clk Out on pin 4, the analyser shows the clk operating at the default 4MHz instead of the config set 8MHz. After many hours and much reading of the datasheet and so on, no result. I sense the problem lies with the configuration statements, but even with only those in the .INFO file there is no response.

Has anyone a suggestion on what direction to go?

Don't know if this will help at all (I haven't read the whole thread yet) but here's one I use on a project of mine. Remember that, in my case, I only have to drive the servo from one extreme to another. I'm not using proportional control at all - just one side or the other.

But this works - so maybe it'll help.

Andy

'12F683 MCU USED FOR SERVO CONTROL

#CONFIG
    __config _HFINT_OSC_NOCLKOUT & _WDT_OFF & _MCLRE_ON & _CP_OFF
#ENDCONFIG

DEFINE OSC 8 'LETS PBP KNOW WE WILL BE RUNNING AT 8MHZ

DISABLE 'NO DEBUG, NO INTERRUPTS

'PIN DEFENITIONS
'GP0 USED FOR ICSP DATA
'GP1 USED FOR ICSP CLOCK
'GP2 USED TO DRIVE SERVO (SIGNAL LINE)
'GP3 USED FOR MCLR AND ICSP PROGRAMMING
'GP4 USED FOR LED
'GP5 USED FOR TRIGGER FROM MAIN PROCESSOR

'SET UP THE SPECIAL REGISTERS
OSCCON = %01110001  '8MHZ INTERNAL CLOCK USED
CMCON0 = %00000111 'CIN PINS ARE I/O, COUT PIN IS I/O
OPTION_REG = 0 'WEAK PULL UPS ARE ENABLED
TRISIO = %00101011 'GP4 AND GP2 ARE OUTPUTS, THE REST ARE INPUTS 
ANSEL = 0 'NO ANALOG PORTS - ALL DIGITAL
WPU = %00100000 'GP5 WEAK PULL UP ENABLED. GP3 WEAK PULL UP AUTOMATICALLY ENABLED
				'AS THE PIN IS DEFINED AS MCLR
IOC = 0 'NO INTERRUPT ON CHANGE

'PIN ALIASES
SERVO VAR GPIO.2
TRIGGER VAR GPIO.5
LED VAR GPIO.4
                                                                                              
'VARIABLES                                                                                     
PERIOD_COUNT VAR BYTE 'TO TIME THE 20mS PERIOD
PULSE VAR BYTE 'PULSE LENGTH IN 100uS INCREMENTS
                                                                                               
SERVO = 0 'MAKE SURE NO SIGNAL                                                                                
LED = 0 'MAKE SURE LED IS OFF
                                                                                               
MAIN:
	DO 'ENDLESS LOOP
		IF TRIGGER = 1 THEN 'CLOSE THE DAMPER
			PULSE = 20 '2.0mS PULSE TO SERVO
			LED = 1 'TURN ON LED
		ELSE 'OPEN THE DAMPER 
			PULSE = 10 '1.0mS PULSE TO SERVO
			LED = 0 'TURN OFF LED
		ENDIF
		FOR PERIOD_COUNT = 1 TO 200 '20mS PERIOD
			IF PERIOD_COUNT > PULSE THEN 'MAKE LINE LOW FOR REST OF 20mS PERIOD
				SERVO = 0 'MAKE SURE SERVO SIGNAL IS NOW LOW
			ELSE
				SERVO = 1 'SERVO SIGNAL LINE HIGH FOR 1.0 OR 2.0mS			
			ENDIF
			PAUSEUS 100 '100uS PAUSE		
        NEXT PERIOD_COUNT                                                                            
    LOOP                                                                                       
END