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Maarten Brock
03/15/12 08:54
Read: 575 times
Tilburg
The Netherlands


 
Msg Score: +1
 +1 Good Answer/Helpful
#186695 - fixed point
Responding to: ???'s previous message
Jeremy Vella said:

float accdeg =((ADCacc - (616)) * 0.431);   /* 616 is my zero */
if (accdeg < (-20.0)) accdeg = (-20.0);     /*rejects wrong  values */
if (accdeg > (20.0)) accdeg = 20.0;
 

How about this then ?

uint32_t accdeg =((ADCacc - (616)) * 431);   /* 616 is my zero */
if (accdeg < (-20000)) accdeg = (-20000);    /*rejects wrong  values */
if (accdeg > (20000)) accdeg = 20000;
 

Instead of a factor 1000 you can also use 256 or 1024 or 65536 or whatever.

P.S. Please don't paste TAB's as every browser has a different idea of where the next column is.

List of 19 messages in thread
TopicAuthorDate
I'm having problems calculating negative float values      Jeremy Vella      03/14/12 12:26      
   float values?      Erik Malund      03/14/12 13:11      
      65536 no      Anders Sandström      03/14/12 14:29      
      negative float numbers      Jeremy Vella      03/14/12 14:38      
         Two comparisons      Per Westermark      03/14/12 15:06      
         Insufficient justification      Andy Neil      03/16/12 00:12      
            re:insufficient justification      Jeremy Vella      03/16/12 02:45      
   how are numbers transmitted?      Stefan KAnev      03/14/12 15:49      
      serial Tx code      Jeremy Vella      03/14/12 16:13      
         Data type?      Per Westermark      03/14/12 19:41      
         Data type?      Per Westermark      03/14/12 19:41      
            serialangle data type      Jeremy Vella      03/15/12 02:43      
               Just a question of readability      Per Westermark      03/15/12 02:54      
                  re: just a question of readability      Jeremy Vella      03/15/12 04:08      
               why do you keep babbeling about 'float'      Erik Malund      03/15/12 07:59      
                  float reason      Jeremy Vella      03/15/12 08:30      
                     fixed point        Maarten Brock      03/15/12 08:54      
                        re:fixed point      Jeremy Vella      03/15/12 18:16      
               typecast      Stefan KAnev      03/15/12 08:07      

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