Math routines

4x5n

I'm looking for math routines for the SX processor. I noticed a link in the sticky thread to such a lib but that link is long broken. As I think of it a lot of the links are broken to old SX threads.

wass

Can you be more specific? Are you coding in assembly or SX/B? 8 bit, 16-bit, 32-bit integers or floating point (I doubt it)?
What operations do you need?

Here's a good place to start if you're looking for assembly code: http://www.sxlist.com/techref/scenix/lib/math/basic.htm

4x5n

wass wrote: »

Can you be more specific? Are you coding in assembly or SX/B? 8 bit, 16-bit, 32-bit integers or floating point (I doubt it)?
What operations do you need?

Here's a good place to start if you're looking for assembly code: http://www.sxlist.com/techref/scenix/lib/math/basic.htm

Sorry, My initial was made on my phone which made a lot of detail difficult. I'm considering using the SX processor with various sensors and output via lcd. The problem is that the first sensor I looked into using (of course) needs to have the output run through a formula that requires multiplication. For example the temp/humidity sensor sold by Parallax requires multiplication by a fraction and finding the square of a number. For my purposes I could get away with integer multiplication and division. I haven't ruled out some sort of a look up table but haven't worked out a way to do it that I like yet.

4x5n

4x5n wrote: »

Sorry, My initial was made on my phone which made a lot of detail difficult. I'm considering using the SX processor with various sensors and output via lcd. The problem is that the first sensor I looked into using (of course) needs to have the output run through a formula that requires multiplication. For example the temp/humidity sensor sold by Parallax requires multiplication by a fraction and finding the square of a number. For my purposes I could get away with integer multiplication and division. I haven't ruled out some sort of a look up table but haven't worked out a way to do it that I like yet.

I forgot to mention that my plan is to program in assembly but I'm not adverse to using SX/B.

wass

If you plan to use SX/B read the section in this document about scaling sensor outputs http://www.parallax.com/Portals/0/Downloads/docs/prod/sic/3rdPrintSmartSensors-v1.0.pdf and keep in mind that SX/B can only do one math operation per assignment statement, but the logic is the same.

Leon

Microchip has plenty of code for maths on the PIC, which could be used.

4x5n

I found a number of routines based on code for the basic stamp that will do what I need. It would be nice if the links contained in the best of SX threads and downloads thread worked though. A lot of interesting stuff there!

Zoot

Here's my library of routines (word integers) that are mostly assembly but designed to be used in an SX/B context. You need to pre-define the variables, then include the sub/func definitions at the top of your SX/B programs and include the "guts" of the routines anywhere in the main program.