Matrix user forums

I've been working with the PIC18F4550 installed on the HP488 board successfully for some time. My version of Flowcode was 5.0 with the 5.1 update. The computer OS is 7, 32 bit. I recently updated to Flowcode Ver 5.2 and to complicate things, Microsoft automatically updated the OS at about the same time.
After making some small changes in my flowchart, I tried to compile the program to the chip and got this message:

Could not ID the onboard chip - assuming it is the one specified in the configuration screen, i.e. PIC18F4550.

I have checked the chip configuration settings and they are the same as before. I have clicked on Autodetect PICmicro and get the message "Could not ID the onboard chip". I have replaced the chip with another new one and get the same messages. I have uninstalled Flowcode 5.2 and reinstalled 5.0 - 5.1 and got the same message. I have restored flowcode back to 5.2. I have checked the board for power and loose connections. Everything seems normal. I can't imagine the Microsoft automatic update changing any settings, but I don't know.

Does anyone have any ideas?
Thanks a bunch, Mac

Hi Mac

Ive seen this message sometimes on my system. I found it would give it if I had certain e-blocks connected to the EB006 when programmming. (Especially on Ports A & B)

Have you tried programming the chip with nothing connected to the EB006.

I tend to have things disconnected from the ports when programming or if doing a lot of reprogramming during development I use a 2nd EB006 to program the device and then drop in the the one with the eblocks. Just remember to turn of the power before swoping chips (Just in case).I have zif sockets on the 40pin devices.

Hope this helps, if not Im sure someone will have more suggestions.

Thanks John. I'll disconnect stuff and give that a try.
Mac

John, all I had connected to the HP488 was 2 EB-004 LED boards. I disconnected them and got the same message as before.
But it was worth a try.
Thanks again. Mac

Ok
Yer I dont recall having problems with those type of boards connected.
I dont think MS update has caused any problems as Im running 5.2 and have all the Win 7 patches installed.

Did spot you are using the HP488 , Ive just tried a 18F4550 in mine and are not able to make it give an error.
Do you want to post a sample program and I can try that see if it gives a problem.

John, you're a genius! I had just started using the I2C function in the chip and had added two 1K ohm pull up resistors
to the clock and data lines on RB0 and RB1. I disconntected these and the compile to chip worked. I'm back in business.
Many thanks John.

No problem
Glad to hear your back in business

Hi Johncrow,

I have faced similar problem...I have manged to solved the problem using your suggestion..

Thanks a lot

Enamul