Hi! How about just adding the 2000 raw integer ADC readings in an uint32_t variable and at the end just divide with the numbers of readings. An uin32_t is much bigger than the 2000*1000, the maximum the samples can sum up. :-)
-- Razvan ME On Sun, 27 Sep 2009, Guillermo De Cesco wrote: > Hi, > > cause buffer size(2000) is bigger than any actual number (0-1000). you > should promote the division opoeration to float > in order to get something different from cero, that is, > > average += (1.0 * x) / buff_size; > > the 1.0 * will do the trick. then if you whant just an integer as result you > should cast the average to int > that is, > > average = (int) average; > > good luck > > -Bill > > On Sat, Sep 26, 2009 at 1:37 AM, Akankshu Dhawan <[email protected]> wrote: > >> Hi All >> I am using IRIS motes and wanted to calculate average values for 2000 >> values so I decided dividing each one of them by the BUF_SIZE (2000) and >> then transferring it to a variable. This involves handling float values, >> since max adc value is 1000(approx) , but when I do this division all values >> I get are zero... can you tell me how I can deal with floating values ? >> >> >> or if there is a predefined function for calculating averages ? >> >> I dont need the average value to be floating .. that final value should be >> integer... >> >> so basically, I have 2000 values between 0-1000 and I want their >> average/mean value.... do you have any suggestions ? >> >> Thanks >> Akankshu >> >> -- >> First they ignore you, then they laugh at you, then they fight you, then >> you win. >> - Mahatma Gandhi >> >> _______________________________________________ >> Tinyos-help mailing list >> [email protected] >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >> > > > > -- > Ing. Guillermo De Cesco > Invenio Ingenieria srl. > tel: (54)2944 442119 > web: www.invenioing.com > Av. Pioneros 4163 Dpto 6. CP(R8402AMH) > San Carlos de Bariloche. > Rio Negro, Argentina. > _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
