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Altera_Forum's avatar
Altera_Forum
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13 years ago

distance calculating in Ultra-sonic ranger , please help !

datasheet information : The SRF04 provides an echopulse proportional to distance. If the width of the pulse is measured in uS,then dividing by 58 will give you the distance in cm, or dividing by ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

You will probably want to find your distance in 10s of mm so your math is much easier (no need for fixed point math). You will end up with distance <= (echo_counter/29);

At this point, you will probably want to write a pipelined division routine to get you your result. Just keep working at it, you'll get there. Good luck.