G`Dave

Change ID Application it is. Thanks for the clarification folks.

Hi, names Dave (Obviously), from Australia. I'm new to this forum, but I've been designing and building a MIDI control surface to emulate a DJ Mixer as an input for Traktor (Two Turntables come next) for the last 6 months. Currently a 3rd year Electrical and Computer systems engineering student. But on with the question. The time has come to program the bootstrap loader into the 18F452, so I attempted to use this programmer, and it didn't work, and in the end my PIC is a smelly piece of burnt silicone. I'd just like a few points clarified as the instructions and diagrams arn't the best. This programmer is capable of programing in Low Voltage Mode and High Voltage Mode (I'm unsure of the difference between the two, but this isn't important at this stage), I've read that Low Voltage Mode will not work, and that High Voltage Mode must be used, however the diagram offered is for Low Voltage Mode. I understand Vpp is connected to 9v, does this also apply to Vdd, or does this remain at 3V. (Why 3V, as opposed to the usual 5V to power the 18F452?) I've tried to use the Broccoli programming software, and it gives the error 'Unable to Identify PIC'. I've tried this under WinXP using the PortTalk driver (Just download the latest version, 2.2, and run AllowIO.exe with the command like "C:\Porttalk\AllowIO.exe 0x378 writepic.exe" am I missing an important step?) I've also tried it under Win98 without using porttalk, and still the same error. I only had one 9v battery, and it was running at 8v, could this be the cause? I noticed Broccoil gave the same error when the programmer was completly disconnected. I've yet to test if the portdiag.exe works with a multimeter. Basically I want to confirm the voltages, 9V on Vpp, 3V on Vdd, RB5 disconnected (Floating? or Grounded?) 0V on Vss with a filter cap between the two. *edit* Well I sure feel like an idiot now, I had the pins of the parallel port as a mirror image of what they should be, and now the Broccoli software is working perfectly. Just one point however, where can I input the ID header to define the Device ID, LCD Screen Type and Baud Rate? I've gathered that this is not part of the program itself, not part of the .hex file, so where in the 'writepic' command line can I input it? So far I've used C:\......\writepic.exe bootstrap.hex