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[shafi008]

Hi Here is the code what i am using and the attachment has the configuration.

@ DEVICE pic16F84A
define OSC 4
TrisB = %00000000

loop:
High PORTB.0 ' Turn on LED connected to PORTB.0
Pause 1000 ' Delay for .5 seconds

Low PORTB.0 ' Turn off LED connected to PORTB.0
Pause 1000 ' Delay for .5 seconds

Goto loop ' Go back to loop and blink LED forever
End

and the hex

0000- 2828 018f 008e 30ff 078e 1c03 078f 1c03
0008- 2823 3003 008d 30df 200f 2803 018d 3ee8
0010- 008c 098d 30fc 1c03 2818 078c 1803 2815
0018- 078c 0064 0f8d 2815 180c 281e 1c8c 2822
0020- 0000 2822 0008 1383 1303 1283 0064 0008
0028- 1683 0186 1283 1406 1683 1006 1283 3003
0030- 008f 30e8 2002 1006 1683 1006 1283 3003
0038- 008f 30e8 2002 282b 0063 283c

[shafi008]

Hi for your reference here is the code listed in C:\pbp\PBP244\16F84A.INC file,

NOLIST
ifdef PM_USED
LIST
include 'M16F8x.INC' ; PM header
device pic16F84A, xt_osc, wdt_on, pwrt_on, protect_off
XALL
NOLIST
else
LIST
LIST p = 16F84A, r = dec, w = -302
INCLUDE "P16F84A.INC" ; MPASM Header
__config _XT_OSC & _WDT_ON & _PWRTE_ON & _CP_OFF
NOLIST
endif
LIST

[Archangel]

Hi Syed,
Your code works. I compiled with MPASM assembler and got this hex:

:020000040000FA
:1000000028288F018E00FF308E07031C8F07031CEA
:10001000232803308D00DF300F2003288D01E83EB8
:100020008C008D09FC30031C18288C070318152838
:100030008C0764008D0F15280C181E288C1C222894
:1000400000002228080083130313831264000800B1
:10005000831686018312061483160610831203305A
:100060008F00E8300220061083160610831203303A
:0C0070008F00E83002202B2863003C28A1
:02400E00FD3F74
:00000001FF

You are NOT using ICD compile are you? Cause it won't work for you, To compile just press the F9 key.

[Archangel]

Ok I think you have not selected the correct chip in Micro Code Studio, and that is why your hex is different. Look at the tool bar and find the selection box and select the PIC you are using, then press F9 to compile. You will need to inspect this box before you compile each time because sometimes it changes without your help.
EDIT: Well . . .I just looked at the attachment and you do have the correct chip selected . . .hmmmm interesting.
<br>EDIT2: Had a second look at the attachment and saw it was MEPROG not MCS, so what I said before the edit stands, In MCS make sure the appropriate PIC is selected and recompile.

[shafi008]

Here is how i did it

I selected 16F84A from the drop down in MCS and F9 to compile one it is compiled without any errors then i press F11 to program it , once pressing F11 it compiles again and opens up Melabs Programmer window, here i made disabled WatchDog and Powe up time disabled.

One selected the Pic16F84A from the drop down i click on "Program".

Thats how i did.................


If you guys have VNC i can share my desktop Joe.

[ScaleRobotics]

The hex files seem to be the same. After compliling, I get one like post #13 if I look at the format my MeLabs programmer displays, but the hex file it uses looks just like post #15. So we must all be compiling the same thing. At least that's something! I have not been able to find my pic16f84a. I have not used those for a long time. The 16f84a has so few settings to begin with, that there isn't a lot to get wrong in the config fuses.

I saw that you have your osc set to 4 mhz. Can you confirm that your resonator is really 4 mhz? If it was 8 to 10 mhz, you should be setting it for HS and not XT.

By the way, do you have any other resonators, or crystals you could try?

[shafi008]

Hi I have the following
a). 4.00 GR
b). F0x040A 4.000 (with this i tried 4.7 / 220 / 10 PF's)

i tried with both , may i will try with a new Pic16f84a.
I dont get it when i take off the VSS then the led is constantly lighted up.

if i keep the multimeter to the pin RB0 then the light comes up steadily.
power at that time would be 0.79 and at MCLR to VSS it is 1.24 volts.

should i change the watchdog / powerup timer ON. and try...?
how much power should i get at the pin?