http://tech.groups.yahoo.com/group/picmicrodevelopersforum/ PIC Micro Developers' Forum - Microchip PIC Microcontrollers Discussion Forum Sat, 04 Jul 2009 22:34:33 GMT Kevin Bennett http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1824 http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1824 ... snip ... snip Hi Steve, Is it not because this bit of the equation "uj1 + uj2 -(uj3 + uj4)" is all in unsigned ints and, with some values, may produce an Sat, 04 Jul 2009 15:05:07 GMT alex http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1823 http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1823 does it surprise you? indeed mixing of data types causes obscure errors on various platforms. I had trouble adapting a source from Lattice C to Aztec C on the Sat, 04 Jul 2009 14:48:23 GMT Steve http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1822 http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1822 Kevin - Thanks for the reply(s). The programming issue turned out to be what we figured it was - the configuration bits were changed. I use two laptops to Fri, 03 Jul 2009 10:33:56 GMT Kevin Bennett http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1821 http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1821 Hi Steve, I've only ever done :- unsigned int i ; unsigned int j ; unsigned int k ; ..... and left the compiler to put them where it feels best :-) have I been Wed, 01 Jul 2009 20:17:57 GMT Steve http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1820 http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1820 How do I best let the compiler assign the next sequential address to RAM variables I want to use ? For example my code does this now: unsigned int Thu, 25 Jun 2009 00:54:35 GMT steve http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1819 http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1819 Has anyone made a metal detector using a microcontroller. I'm working on a wired submersible robot based on the 16f84 running 20MHz and was thinking of adding Tue, 09 Jun 2009 07:00:38 GMT Kevin Bennett http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1818 http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1818 ... . . . ... Hi Steve, Don't know about the dsPIC33 but I've had similar problems in the past with one of the 16F range, can't exactly remember what is was Mon, 08 Jun 2009 22:54:59 GMT Steve http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1817 http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1817 I'm getting some cryptic errors when trying to program dsPIC33 micros with a Real Ice emulator running MPLAB 8.30 (latest version) . In some cases these are Tue, 02 Jun 2009 15:39:23 GMT alex http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1816 http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1816 it is now executing! initially i wrote it takes 30 cycles, but that is not true, each software-supported CALL takes 62 cycles (max. 8 levels). it is a little Sat, 30 May 2009 11:51:05 GMT bergweed http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1813 http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1813 I'd bend your rules and add a 8 pin LM567C tone decoder. It's small, cheap and has a low parts count. http://www.national.com/mpf/LM/LM567C.html Fri, 29 May 2009 17:26:03 GMT Kevin Bennett http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1812 http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1812 ... . . . The generator of the signal can only output 20KZ tones but it can be switched on an off very rapidly, so I thought that I might be able to code the Thu, 28 May 2009 21:10:01 GMT alex http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1810 http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1810 there are some st*pid spelling mistakes, for which I am sorry, of course. Thu, 28 May 2009 21:04:17 GMT alex http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1809 http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1809 today i have run the first successful test of the software atack! the 16f57 also is using the FSR all the time for banking, so it means, there is no zero page Thu, 28 May 2009 20:49:51 GMT alex http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1808 http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1808 Hi, yes this can be done like you outlined it. however, you also need a break signal, which in the case of the described protocol, must be meaningfully longer Thu, 28 May 2009 19:58:32 GMT silverfoxgmail http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1807 http://tech.groups.yahoo.com/group/picmicrodevelopersforum/message/1807 This is my first post to this list and I apologize for the fact that it is a question. I am mostly a software guy but I have created some useful projects based