PIC scope, a funny idea
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From: Jan Panteltje on 2 Apr 2010 13:21 On a sunny day (Fri, 2 Apr 2010 09:42:31 -0700 (PDT)) it happened a7yvm109gf5d1(a)netzero.com wrote in <155e15a0-540e-4dd1-bbf5-cc4ffc990ec6(a)f13g2000vbl.googlegroups.com>: >On Apr 2, 9:06�am, Jan Panteltje <pNaonStpealm...(a)yahoo.com> wrote: >> PIC scope, a funny idea >> >> So sometimes, while coding you have these ideas, >> I was thinking how about downloading all that data from PIC scope to the = >PC. >> Then it occurred to me, 'screendump'. >> >Hey do you use C, assembler or something else to code your stuff? All PIC asm. It is simple :-)
From: Greegor on 4 Apr 2010 22:53 On Apr 2, 12:21 pm, Jan Panteltje <pNaonStpealm...(a)yahoo.com> wrote: > On a sunny day (Fri, 2 Apr 2010 09:42:31 -0700 (PDT)) it happened > a7yvm109gf...(a)netzero.com wrote in > <155e15a0-540e-4dd1-bbf5-cc4ffc990...(a)f13g2000vbl.googlegroups.com>: > > >On Apr 2, 9:06 am, Jan Panteltje <pNaonStpealm...(a)yahoo.com> wrote: > >> PIC scope, a funny idea > > >> So sometimes, while coding you have these ideas, > >> I was thinking how about downloading all that data from PIC scope to the = > >PC. > >> Then it occurred to me, 'screendump'. > > >Hey do you use C, assembler or something else to code your stuff? > > All PIC asm. > It is simple :-) Would this be a good beginners kit for PIC programming? Are the software tools like the assembler economical? What do PIC trainers cost? The MAKE and circuit bender people would love it. The price IS impressive, but could it be fleshed out more fully and still have a low cost? Is the fancier A/D stuff too pricey to take it that far?
From: Grant on 5 Apr 2010 06:14 On Sun, 4 Apr 2010 19:53:46 -0700 (PDT), Greegor <greegor47(a)gmail.com> wrote: >On Apr 2, 12:21 pm, Jan Panteltje <pNaonStpealm...(a)yahoo.com> wrote: >> On a sunny day (Fri, 2 Apr 2010 09:42:31 -0700 (PDT)) it happened >> a7yvm109gf...(a)netzero.com wrote in >> <155e15a0-540e-4dd1-bbf5-cc4ffc990...(a)f13g2000vbl.googlegroups.com>: >> >> >On Apr 2, 9:06 am, Jan Panteltje <pNaonStpealm...(a)yahoo.com> wrote: >> >> PIC scope, a funny idea >> >> >> So sometimes, while coding you have these ideas, >> >> I was thinking how about downloading all that data from PIC scope to the = >> >PC. >> >> Then it occurred to me, 'screendump'. >> >> >Hey do you use C, assembler or something else to code your stuff? >> >> All PIC asm. >> It is simple :-) > >Would this be a good beginners kit for PIC programming? >Are the software tools like the assembler economical? Can't beat free :) And learning the assembler language is easy, summary of the RISC instruction set fits on one screen. Lots of example code from Microchip, great resource for seeing an outline of what's needed for some tasks. In my case, reminders of algorithms help, as I last wrote code for uC chips in '93. >What do PIC trainers cost? PICkit2 for ~USD50, I'm using it with the 28-pin demo board (~USD25) which has a PIC chip with built in debugger support (PIC16F886), 20MHz osc option, 32k second xtal for RTC. Lots of fun. But I'm only using a 16 char x 2 line LCD module for output. Didn't think one could run a graphics display off a PIC until Jan showed his project. > >The MAKE and circuit bender people would love it. > >The price IS impressive, but could it >be fleshed out more fully and still >have a low cost? > >Is the fancier A/D stuff too pricey to take it that far? Grant. -- http://bugs.id.au/
From: Nico Coesel on 5 Apr 2010 12:03 Jan Panteltje <pNaonStpealmtje(a)yahoo.com> wrote: >On a sunny day (Fri, 2 Apr 2010 09:34:55 -0700 (PDT)) it happened Greegor ><greegor47(a)gmail.com> wrote in ><36a13898-fb3f-475c-889e-3b95a5985e44(a)e7g2000yqf.googlegroups.com>: > >>It looks like most of the USB oscilloscopes >>depend heavily on software running on the PC. >> >>If you make it fast, have it output to standard >>JPEG files and use the older USB 1.0 to the >>PC then ANY old junk PC can be used to >>display the results. >> >>The PC would need no software, and any >>old windows or Linux OS can display JPEG. >> >>If the PIC could write the JPEG to the FLASH >>memory in a cheap digital camera through it's >>tiny USB connector even that could be used >>as a portable display. >> >>Add the much better A/D and an LCD screen >>and pretty soon you've got the Rigol $550 scope. > >Yes, sure. >But this is a 3 $ single chip scope, not counting the more expensive 64 x 128 graphics LCD. >It is neat that it can be controlled by, and output RS232. >Also it can do games ;-) >To make it stand alone all that is needed is a second PIC as keyboard controller, 'Second PIC' should trigger: use a real uC that can do all tasks by itself. Adding multiple PICs together always results in a kludge. I've seen it happen too many times. Actually some controllers allow to start an ADC conversion on a timer match. You could rip de guts of an old 20MHz oscilloscope and create a digitizing oscilloscope by using the timer to delay the sampling (the sampling is started using the trigger logic). -- Failure does not prove something is impossible, failure simply indicates you are not using the right tools... nico(a)nctdevpuntnl (punt=.) --------------------------------------------------------------
From: Jan Panteltje on 5 Apr 2010 14:45
On a sunny day (Mon, 05 Apr 2010 16:03:54 GMT) it happened nico(a)puntnl.niks (Nico Coesel) wrote in <4bba0833.601788593(a)news.planet.nl>: >>Yes, sure. >>But this is a 3 $ single chip scope, not counting the more expensive 64 x 128 graphics LCD. >>It is neat that it can be controlled by, and output RS232. >>Also it can do games ;-) >>To make it stand alone all that is needed is a second PIC as keyboard controller, > >'Second PIC' should trigger: use a real uC that can do all tasks by >itself. Adding multiple PICs together always results in a kludge. I've >seen it happen too many times. Some people have seen Elvis still alive too :-) Here is one that uses 2 PICs and has been working now OK for a long time, and is used every day: http://panteltje.com/panteltje/pic/swr_pic/index.html It is a stupid idea that 2 micros should be bad and 1 OK. It is based on absolutely nothing. Following that theory start throwing away your mouse, your keyboard, whatever else you have that has micros in it, On the contrary! Modular makes it all possible! >Actually some controllers allow to start an ADC conversion on a timer >match. So does the PIC, so what. >You could rip de guts of an old 20MHz oscilloscope and create a >digitizing oscilloscope by using the timer to delay the sampling (the >sampling is started using the trigger logic). ??? Take a break. |