MCUmall EPROM BIOS Chip Burner Forum
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 PIC16F877A with Enhanced JDM Programmer

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T O P I C    R E V I E W
grim4593 Posted - 11/12/2007 : 20:13:30
I bought the Enhanced JDM Programmer and I have been having quite a few difficulties. I am trying to use a PIC16F877A for my senior project design but I cannot get it to program.

First off I am on a laptop with a serial port. I dropped in the 16F877A and PICPgm wouldn't even recognize the chip. It detected that I had a JDM programmer on the COM1 port, but kept saying there was no PIC chip. I tried numerous other chips like the 16F684, 12F675, 16F676, 16LF84A, and the only chip that I was able to detect was the 16F684. The 16F684 was the only one i could program successfully as well.

Using WinPIC800 i was able to detect the JDM Programmer and the 16F877A chip, however it gives me an error when it writes and verifies the program.

I have also tried programming the chip by connecting 12V to the external power port and changing the jumper to pins 1 and 2. However, when I do that, WinPIC800 doesn't detect the 16F877A anymore, and the PICPgm still didn't detect or program the chip.

Also the red light never comes on.

Any suggestions?

EDIT:
I went into a computer lab on campus and the programmer worked fine. PICPgm detected and programmed the 16F877A, the red LED blinked and the program passed verification. I would still like to know why the programmer does not work correctly on my laptop however. My desktop computer does not have a serial port and I would rather not have to be on campus because most of my programming and testing will be done at home. In the meantime I am going to order a serial card for my desktop.
2   L A T E S T    R E P L I E S    (Newest First)
grim4593 Posted - 11/15/2007 : 18:11:16
Well, I have a old digital camera that uses a serial cable to transfer pictures, and it works fine. Shouldn't the programmer run using the external +12 voltage source?
ZLM Posted - 11/15/2007 : 01:15:59
Most likely your laptop serial port is not the standard serial port. The red LED not light up means it has no voltage or voltage too low.

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