Hello Jan,
> Found the missing words!! Cool. > The package is now loading complete. > But it is not working. > When input a float or a double the system is crashing. not cool. > > Has someone some experience with this package? Not me. But see below. > I have read there is also a FP package in assembler, where could I > find that? There is another repository with "community contributed" files. On the amforth homepage http://amforth.sourceforge.net/ Click on "Community" (the first entry in the title area), this will point you to https://sourceforge.net/p/amforth/community/HEAD/tree/ where you find a subdirectory "floatingpoint" This is old and possibly outdated material, so do not despair. --- I would like to make you aware, that floating point calculations can often be replaced by "scaled integer" operations. Examples: 1. handle a Temperature in 1/10 or 1/100 degrees Say a thermometer sensor is providing readings with 1/10 degree resolution. That means, a reading of 245 really means 24.5 C. Then there is no need to convert this to floating point, because you can create a function to "print" the value with 1 digit behind the decimal point. > > ver > amforth 6.6 ATmega644P ok > > : .f1 <# # [char] . hold #s #> type ; > ok > > 245 s>d .f1 > 24.5 ok (I had to remember that <# ... #> formatting handles double values :-) 2. to handle calculations in scaled integer, the programmer decides, how many bits of a given value are considered to be the fractional part. For a complex example look here: https://sourceforge.net/p/amforth/community/HEAD/tree/ewlib/sht75.fs The word sht.H.raw>lin converts the sensor reading from its raw value to the "linear" value by applying a correction. \ H_25 [%] = c1 + c2*Hraw + c3*Hraw^2 \ 12bit: c1=-4 c2=0.0405 c3=-2.8e-6 I have scaled the calculation by 10^7 and thus eliminated the need to work with floating point. I'm not saying you must always use scaled integer. I'm just saying: if you don't know this technique, check it out, and maybe it fits your needs. See Leo Brodie -- Starting Forth: http://home.iae.nl/users/mhx/sf.html Chapter 7. Cheers, Erich > > Cheers, > > Jan > > >> Op 21 dec. 2018, om 10:55 heeft Jan Kromhout <krom1...@hotmail.com> het >> volgende geschreven: >> >> Hello, >> >> Try to load the Floating point package. >> How do, or find I the words get-recognizer and set-recognizer? >> >> What is the meaning of the word "place-rec" and what is the input? >> >> Thanks for any help. >> >> Cheers >> >> Jan >> >> >> |S| 930|: place-rec ( xt -- ) >> |S| 931| get-recognizer >> |E= ?? -13 14 >> **** /Users/jankromhout/Documents/amforth-6.7/tools >> Error: Error in line sent >> >> >> >> : place-rec ( xt -- ) >> get-recognizer >> dup >r >> 1- n>r >> swap >> nr> drop r> 1+ >> set-recognizer >> ; >> >> _______________________________________________ >> Amforth-devel mailing list for http://amforth.sf.net/ >> Amforth-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/amforth-devel > > > > _______________________________________________ > Amforth-devel mailing list for http://amforth.sf.net/ > Amforth-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/amforth-devel -- May the Forth be with you ... _______________________________________________ Amforth-devel mailing list for http://amforth.sf.net/ Amforth-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amforth-devel
