I am using a PICkit2, and not having any trouble with compiling or downloading code to a PIC. However I notice that some programs won't run until I disconnect the programmer; then they run just fine. Is this expected?
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Do you have the /MCLR box checked (under the Vdd setting).
If checked it will hold the device in reset until you either uncheck it or disconnect the PICkit 2.
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Iv been having this exact same problem now for a couple of years, Iv Just found a simple workaround that will let you keep your PK2 plugged in and you don`t have to keep opening the PK2 s/ware gui to unset the MCLR.
if you go into your GCB folder, and locate the file called "prefs.dat" then have a look down to see the Pickit entry, you need to add "-R" to the end of that line thusly:
I don't see that in the GCB prefs.dat but I do see it in the Great Cow Graphical Basic compiler prefs.dat file so I assume that is what you refer to?
Also, if you add a -T then the PICkit 2 can power your board. Limited to about 70 ma I believe but that is usually more than enough for most simple projects.
You can also set the voltage with the -A option. 3.3 volt setting
-A3.3
I am using a PICkit2, and not having any trouble with compiling or downloading code to a PIC. However I notice that some programs won't run until I disconnect the programmer; then they run just fine. Is this expected?
Do you have the /MCLR box checked (under the Vdd setting).
If checked it will hold the device in reset until you either uncheck it or disconnect the PICkit 2.
Thanks so much; that was the piece of information I was missing. That will save me time while debugging.
I
v been having this exact same problem now for a couple of years, Iv Just found a simple workaround that will let you keep your PK2 plugged in and you don`t have to keep opening the PK2 s/ware gui to unset the MCLR.if you go into your GCB folder, and locate the file called "prefs.dat" then have a look down to see the Pickit entry, you need to add "-R" to the end of that line thusly:
params = -PPIC%ChipModel% -F"%FileName%" -B"%instdir%\programmers" -M -R
then save it.
you`ll have no problems with it being held in reset after programming anymore :)
I don't see that in the GCB prefs.dat but I do see it in the Great Cow Graphical Basic compiler prefs.dat file so I assume that is what you refer to?
Also, if you add a -T then the PICkit 2 can power your board. Limited to about 70 ma I believe but that is usually more than enough for most simple projects.
You can also set the voltage with the -A option.
3.3 volt setting
-A3.3
5 volt setting
-A5
params = -PPIC%ChipModel% -F"%FileName%" -B"%instdir%\programmers" -M -R -T -A5
In The GCB@SYN which I use at greatcowbasic.com for the CHIPINO this is set in the flashpic.bat file under the G@Stool folder.
REM Call PicKit2 command-line programming Software:
"PicKit2\pk2cmd.exe" -b"%G@SDir%\PicKit2" -pPIC%2 -f%1 -m -j -t -r -a5
I added -j as well which shows a precentage of programming complete while programming. This helps to show progress for big programs.