mirror of https://github.com/rusefi/speeduino.git
removed unused variables
removed unused variables in fastMap1023toX function
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26
math.h
26
math.h
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@ -10,11 +10,35 @@ int fastMap(unsigned long x, int in_min, int in_max, int out_min, int out_max)
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//This is a dedicated function that specifically handles the case of mapping 0-1023 values into a 0 to X range
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//This is a common case because it means converting from a standard 10-bit analog input to a byte or 10-bit analog into 0-511 (Eg the temperature readings)
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int fastMap1023toX(unsigned long x, int in_min, int in_max, int out_min, int out_max)
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//int fastMap1023toX(unsigned long x, int in_min, int in_max, int out_min, int out_max)
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//removed unused variables, in_min and out_min is aways 0, in_max is aways 1023
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int fastMap1023toX(unsigned long x, int out_max)
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{
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return (x * out_max) >> 10;
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}
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/*
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//Unsigned int assembly multiply, result in 20 clocks
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//Need speed test
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unsigned long hwdu16(unsigned int x, unsigned int y){
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unsigned long result;
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asm("mul _y, _x"); //arg1l * arg2l - >
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asm("movw _result+2, r0");
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asm("movf _y+1,_x+1");//arg1h * arg2h - >
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asm("movw _result, r0");
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asm("mul _y, _x+1"); //arg1l * arg2h - >
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asm("add _result+2,r0");//add cross
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asm("adc _result+1,r1");//products
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asm("clr r0");
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asm("adc _result,r0");
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asm("mul _y+1, _x"); //arg1h * arg2l - >
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asm("add _result+2,r0");//add cross
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asm("adc _result+1,r1");//products
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asm("clr r0");
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asm("adc _result,r0");
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return(result);
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}*/
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/*
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The following are all fast versions of specific divisions
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Ref: http://www.hackersdelight.org/divcMore.pdf
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