Revision e8960789
toolbox/current.c  

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* MUX = 8, PB3(ADC8) 
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*/ 
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ADMUX = _BV(MUX3); 
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DIDR1 = _BV(ADC8D); 

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/* 
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* ADLAR = 0, right adjust result 
...  ...  
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/* keep a running total of samples and samples squared */ 
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sum += new; 
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sum = old; 
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sum_sq += new*new; 

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sum_sq = old*old; 

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sum_sq += (unsigned long)new*new;


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sum_sq = (unsigned long)old*old;


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} 
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/*unsigned char isqrt(unsigned int x) { 

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unsigned int sqrt, mulmask; 

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sqrt = 0; 

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mulmask = 0x80; 

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if (x > 0) { 

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while (mulmask) { 

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sqrt = mulmask; 

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if (sqrt * sqrt > x) 

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sqrt &= ~mulmask; 

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mulmask >>= 1; 

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} 

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} 

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return sqrt; 

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}*/ 

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unsigned int current_read() { 
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unsigned int _sum; 
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unsigned long _sum_sq; 
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