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Revert "Temporary fix for pulseIn() regression."

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This reverts commit 8ddc5198f6ef8b2816a61b7b0fcce99f927d11a0.
To be substituted by ASM generated code
This commit is contained in:
Martino Facchin 2015-03-02 13:22:07 +01:00
parent 5933a7e8d3
commit 0c9f0d50a5
1 changed files with 4 additions and 20 deletions
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24
hardware/arduino/avr/cores/arduino/wiring_pulse.c
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@ -61,25 +61,9 @@ unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout)
width++;
}
// convert the reading to microseconds. There will be some error introduced by
// convert the reading to microseconds. The loop has been determined
// to be 20 clock cycles long and have about 16 clocks between the edge
// and the start of the loop. There will be some error introduced by
// the interrupt handlers.
// Conversion constants are compiler-dependent, different compiler versions
// have different levels of optimization.
#if __GNUC__==4 && __GNUC_MINOR__==3 && __GNUC_PATCHLEVEL__==2
// avr-gcc 4.3.2
return clockCyclesToMicroseconds(width * 21 + 16);
#elif __GNUC__==4 && __GNUC_MINOR__==8 && __GNUC_PATCHLEVEL__==1
// avr-gcc 4.8.1
return clockCyclesToMicroseconds(width * 24 + 16);
#elif __GNUC__<=4 && __GNUC_MINOR__<=3
// avr-gcc <=4.3.x
#warning "pulseIn() results may not be accurate"
return clockCyclesToMicroseconds(width * 21 + 16);
#else
// avr-gcc >4.3.x
#warning "pulseIn() results may not be accurate"
return clockCyclesToMicroseconds(width * 24 + 16);
#endif
return clockCyclesToMicroseconds(width * 21 + 16);
}