PIC16F876A IDC Run time interrupt

I'm using a melabs U2/USB Programmer w/ Microcode studio plus - PICBASIC PRO.
I've followed the instructions for physical connections and precautions on the MELabs website entitled "In-Circuit Serial Programming (ICSP) with the EPIC™ Programmer, melabs Serial Programmer, or melabs U2/USB Programmer"
When I perform a standard compile and program the PIC works great, when I try an ICD compile and program it appears to complete but when I try to run the program I get an ICD connection timeout.
I tried the Oscillator Setting, the Disable Debug Directive, the Define loader and physically resetting the PIC at the MCLR pin.
What could possibly be the issue?

Are you using any HSER DEFINE's ?

If so, comment them out.
MCSP sets the baud rate for the USART while debugging
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PULSE VAR PORTC.2
RL1 VAR PORTC.1
RL2 VAR PORTC.0
HEATIN VAR PORTA.1
SENSIN VAR PORTA.0
ADCON1 = 0011 'Declare A ports 0 & 1 as Analog to dig converters
ADCON1.7 = 1 'Analog to Digital variables declared right justified
TRISA = 255
DEFINE ADC_BITS 10 '10 bit conversion used
DEFINE ADC_SAMPLEUS 5 'set sample time
SENSVAL VAR Byte
DEFINE LOADER_USED 1
DISABLE DEBUG


loop_delay CON 500 ' adjust to tweak timing
ms_count VAR WORD


loop:

FOR ms_count = 0 TO 999 ' 0 to 999mS

IF ms_count < 14 THEN ' PULSE low 0 to 13 mS
low PULSE
ELSE ' PULSE and RL1 high at 14
high PULSE
high RL1
high RL2
ENDIF

IF MS_count > 8 THEN ' RL1 low at 9 mS
high RL2
ENDIF

IF ms_count > 995 THEN ' RL2 low at 995 mS, high at 0
low RL1
ENDIF

IF ms_count = 997 THEN ' Read PORTA.0 ADC VALUE put in mem loc 0
ADCIN PORTA.0, SENSVAL
ENDIF

IF ms_count < 500 THEN
High 0
ENDIF

IF ms_count > 499 THEN
low 0
ENDIF

IF ms_count < 500 THEN
low 1
ENDIF

IF ms_count > 499 THEN
high 1
ENDIF

PAUSEUS loop_delay ' fill in time for 1mS loop

NEXT ms_count

goto loop
END

Are you using a MAX232 between the USART and the PC.

Or, are you trying to use the melabs U2 to debug. (won't work)

Also, 99% of your program is disabled. Remove the DISABLE DEBUG.
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I am not using the MAX 232...
I take it is a must!?

And i think it's not the whole thing as well... some variable declaration are missing... AND...

Code:

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ADCON1 = 0011 'Declare A ports 0 & 1 as Analog to dig converters

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unless there's a copy/paste error here, it may screw few things... No i didn't open TFM to know how much ADCON=11 is different of ADCON1=%0011

Quote:

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Originally Posted by clem

I am not using the MAX 232...
I take it is a must!?

---

Yes Indeed, look the Help file... under the Hardware requirement. You'll discover something interesting ;)

tutorial
http://www.rentron.com/PicBasic/MCS_X3.htm

schematic
http://www.rentron.com/images/004LOAD.GIF

Quote:

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Originally Posted by clem

I am not using the MAX 232...
I take it is a must!?

---

Yes, it's a MUST.

Microcode Studio's ICD communicates with the PIC via the RS232 port, and uses the USART on the PIC.
There's no other way to do it.
<br>

Thank you guys so much this is a huge help!!!!!!

Jim-

You're welcome, good luck!