In SX Microcontrollers, SX/B Compiler and SX-Key Tool, rodneymc wrote:

Jon, I'm not understanding why a delay is needed... is this just another way to do it?

I thought PULSIN does the waiting, for you...  

Jim, I think the issue is that you're watching 1 byte instead of 2 bytes for you - if it always comes back as '80' that's one byte, and you need to watch TIM as a word.   Jon fixed that for you in his sample code, but I'm surprised it doesn't come up as 2 bytes.

Most is 'borrowed' code from the Thereping code, and some older of Jon's Code, but works for me with the SX.

Scale 		CON 	10  ' PING))): raw x 10.00 = uS
RawToIn 		CON 	$0379	' 1 / 73.746
RawToCm 	                CON 	$08D1	' 1 / 29.034

	LOW Ping                                      ' make trigger 0-1-0
	PULSOUT Ping, Trigger                         ' activate sensor
	PULSIN  Ping, 1, rawDist                      ' measure echo pulse
	rawDist = rawDist * Scale                     ' convert to uS
	rawDist = rawDist / 2                         ' remove return trip

then rawDist can be made into inches or cm

  	inches = rawDist ** RawToIn          ' convert to inches
  	cm = rawDist ** RawToCm              ' convert to centimeters

Note that inches, cm, & rawDist are words.

Hope this helps!

Rodney

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