also, make sure you have enabled the win2000 driver if you are using win2000…
Hey guys, I’m back with an update on my JDM. Upon Thorsten’s instance that it would be unlikely that the transistor had burnt out, I waited until I had an oppertunity to use my programmer on a different machine before I tore it apart. So I finally tore myself away from campus this weekend and went home where I could re-test it. My results are as follows: IT STILL WORKS!!!
Conclusions: I know that the configuration settings in IC-Prog on my machine at school are still set up correctly as I had checked them on several occasions so I’m guessing that either I am forgetting a step on my computer or I somehow damaged my serial port on my motherboard with the latter being highly unlikely.
I am running Win2K on my machine at school. I have the 2000 driver installed for IC-Prog and it has worked in the past. Tips, tricks, or advise would be appreciated, otherwise I will just do all of my programming from home as this semester is almost finished with anyway.
Well, thanks for the input guys. I am sure that I’ll be back here before too long.
I solved a problem I had with IC-Prog and the JDM programmer kit I got from Talking Electronics when running Windows XP. I couldn’t get the “official” IC-Prog NT driver to work for me, hence discovered this workaround solution.
In short: I use a device driver (totalio.sys) that gives total access to the I/O ports like the good old DOS/Win95 days. Solved problems I had using this JDM programmer with 2000/XP and buring PIC16F84 (but should in theory also work for other PICs since it’s just an IC-Prog issue I had).
I tried reusing my PIC16F84 JDM programmer without success, the programming voltage was too low even at I/O delay 1. (I was using I/O delay 10 with PIC16F84 chips.)
So I rebuilt the JDM programmer on an experimenters board according to circuit diagram on uCapps.de. (8.2v zener diode instead of 8.7v)
The programming voltage was less than desired and it didn’t burn.
So I substituted the 8.2v zener with a 9.1v.
Still didn’t work with I/O delay 1, but with I/O delay 10 it WORKS! Just thought people should know that a 9.1v zener works, and that a very low I/O delay might be a cause for failure.
TK: I suggest you update the JDM module page and mention using a 9.1v zener as a substitute. Also mention that a low I/O delay can introduce problems of its own - perhaps because I’m running a fast PC?
Thanks for the input, I will take this into account when I update the MBHP_JDM page next time. Oddly enough that for the 8.7V zener diode you have to decrease the IO delay, however…
The JDM seems to be working now so I’m just posting a follow up. As I thought, the extremely low voltages were caused by a bad connection somewhere - a re-solder of the serial plug brought the voltages right up to a much closer level.
Following wilba’s advice I upgraded the 8.2V zener to 9.1V. With the addition of the two 9V batteries I was getting close enough to the correct voltages.
When I tired to program the 18f452, i was getting a verified failed. Swapping to COM1 and a connection to SGND seemed to fix that problem (not sure which one it was as i did them both at the same time).
Now, the programming of the bootstrap loader seems to have worked - is therre any other way to verify that it burned correctly or is the “Verify after programming” enough?
Thanks all for your help, now that i’ve finished the JDM (with all the optional extras ) I can begin on the core module.
I think that it may be of interest to the forum to relate my experiences of trying to carry out the initial programming using my newest PC running on Win ME.
The JDM failed to successfully measure the MCLR voltage correctly. This should be about 14V but measured -0.6V!.
I eventually switched to a discarded PC using Win 98 and the program worked and the program verified.
I also tried the same procedure with B and W Laptop and although MCLR was a little lower it also worked.
I looks as if Win ME may suffer from the same problem as those with Win XP.
I have built the JDM programmer according to your schematics, My OS is window 2000 professional, i have install ic-prog driver for 2000/NT also.. However.. when i am programme the chip( PIC16F874A ), the error message “verify failed at 0000h” appear, and when i read the chip, the file is all 0.. also, the blank check function show “device NOT blank at 0000h” although the chip that i place is new chip..
another problem is when i click on “enable data out” at hardware test, that is nothing happen.. The Data In Box is still appear uncheck.. nothing happen, would this mean some part is wrong?? or ?? :-/
I have recheck the cirxuit board connection again and again, and read through the problem, but the problem still same :(. May anyone give me a help??
in the I2C (I<squared>C) options page, checked “Enable MCLR as VCC” and then it worked! (I/O delay was 20, but other values are probably ok as well) I’m not sure what this does exactly, but it worked, so I’m happy!
I think it is a good idea if new questions are placed on a new thread, as otherwise this thread will become too large for confused beginners to navigate!
steven_c.. yup i think this question should be publish as new thread, sorry for my mistake… but since the question is post at here already, i think i should continue at here or?? ???
i can find the link in the first thread..
FIRST OF ALL, GO TO “How to program a pic” LINK IN MENU ON www.ucapps.de
not have “How to program a pic” LINK IN MENU.. may you check that webpage again, probably it disminish it when updated.. i only can find the jdm link in that webpage..
to arumblack:
yup i have select the correct device-- PIC16F874A
to Ryan:
i will recheck the circuit board.. and replace the capacitor.. i doubt is it a component failure?? may you suggest some tips for me to test whether the component can work properly or not?? thanks…
