Post by thread:Tait's PIC programmer

Hi, > I've seen this mentioned a few times. Can someone tell me about this ? > Email is fine (no need to bother the list) You can ftp the info about this programmer from: ftp://ftp.ee.ualberta.ca:/pub/cookbook/comp/ibm/pic84pgm.zip Although many people have let me know that they have got the programmer to work it is worth giving a few words of caution if you are thinking of building it: * I developed this project using a 20MHz 386DX machine and have subsequently found the C version to be unreliable when used with my 33MHz 486DX. Obviously a timing problem and I will try to fix this when I get some spare time. The Qbasic version still worked though, and the C version worked with turbo mode switched off. You can fix it yourself by adding appropriate delays for your own PC. * Please note that the executable packaged with the programmer info was built for hardware using a 7406. If you use a 7407 you must uncomment "#define U7407" and recompile. The Qbasic source is also intended for hardware using a 7406. To use the Qbasic program with 7407 based hardware then include these definitions: CONST DataInv = 0 CONST VppOn = 8, VppOff = 0, VddOn = 4, VddOff = 0 CONST ClkHi = 2, ClkLo = 0, OutHi = 1, OutLo = 0 (Due to a typo, the program erroneously suggests that you should use ClkHi = 4. Sorry about that.) * If you don't use LS buffers you should substitute a 7805 for the 78L05. Cheers, David -- spam_OUTdavid.taitTakeThisOuTman.ac.uk