vasile surducan wrote: > On 11/14/09, Wayne <[email protected]> wrote: >> >> funlw65 wrote: >>> In the past I worked with jallib 0.2.0, serial software and 12f675 at >>> 4MHz internal with a maximum of 4800bps without garbage characters (of >>> course, OSCCAL had to be setup at factory settings): >>> >> http://sites.google.com/site/funlw65/electronics/windmill-controller-with-pic12f675 >> Thanks for that link Vasi. I seems we have similar interests. The >> 12f509 project I had in mind is to measure the temperature in my outside >> battery box and switch my wind mill to power some 12 volt heaters. The >> more that I look at it I think the 509 may not be enough chip :-) >> There is a lot more I want to do, now. >> >>> For 9600bps you need a minimum of 8MHz clock frequency. And is working >>> even if is about internal clock (it needs a correct osccal if that is >>> required). >> I read somewhere (I read a lot but never remember where I read it), that >> a 1.8432 MHz crystal would be a good choice for 9600 baud. > > > > >> This is related with zero error stuff I described but for the hardware >> UART. Using a crystal value a power of 2 solve the problem of computed >> errors. Also other choices are available: 3.6864, 7.3728, 14.7456MHz. As >> higher the crystal value as better if you need speed in your application. >> 4MHz is enough for 115200bps in a small PIC like 12F675/629 etc. The >> venerable 509 has 2 level stack, is not a good choice for extensive >> procedures written in jal (maybe inline jal). > > > Vasile
I have revised my goals Vasile. I now want to run instead of crawl. My mind is spinning with other features I want add to the simple task I wanted to do before. I think I might even look into the 18f's now. I'm starting to feel like I did 30+ years ago when I was programming my first 8080 in assembly. This is getting to be a lot of FUN! Best Regards Wayne --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/jallib?hl=en -~----------~----~----~----~------~----~------~--~---
