i think FS is for fusefs not? 2012/1/20 Eloy Paris <[email protected]>: > Hello, > > I'm adding owfs support for a new device and am a bit confused regarding > conventions/best practices and what to do in the FS_xxxx() and OW_yyyy() > functions. > > Using ow_1820.c as an example, to read a temperature from a DS18x20 > sensor, we have: > > FS_10temp() is the read function used for the "temperature" entry in the > struct filetype DS18S20[] array. > > FS_10temp() in turn calls OW_10temp(),which ends up performing the > necessary bus transactions or calling other OW_yyyy() functions that > perform more bus transactions (in the ow_1820.c case, OW_10temp() sends > the "start conversion" command doing a direct bus transaction, and then > calls OW_r_scratchpad() to read the scratchpad). > > An important thing done in OW_10temp() is that it converts the DS18x20 > representation of a temperature to a float. > > One difference that I can see between the FS_xxxx() and the OW_yyyy() > functions is that the FS_xxxx() functions have the following declaration: > > ZERO_OR_ERROR FS_xxxx(struct one_wire_query *owq) > > and the OW_yyyy() functions are basically free-form. > > I have also noticed that the FS_xxxx() functions do not do bus > transactions directly. Instead, they seem to call OW_yyyy() functions. I > have not looked much, though, so I don't know if there are any exceptions. > > Now, my device also provides different values that require conversion > from a device internal representation to a more common representation > (like a floating point number). Should I be doing these conversions in > FS_xxxx() or in OW_yyyy() functions? If I follow the "convention" in, > for example, ow_1820.c, then it would have to be OW_yyyy(), but I wanted > to confirm. > > And more in general, are there any guidelines on the use of FS_xxxx() > and OW_yyyy() functions, like what should be/should not be done in each > "class" of function? > > Thanks in advance for any insight. > > Cheers, > > Eloy Paris.- > > ------------------------------------------------------------------------------ > Keep Your Developer Skills Current with LearnDevNow! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-d2d > _______________________________________________ > Owfs-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/owfs-developers >
-- Roberto Spadim Spadim Technology / SPAEmpresarial ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
