useing a speeed ultrasonic sonar

nvale55@gmail.com · 2012-10-09 08:57

Hi

Im currently messing around with some Speeed Ultrasonic Sonar sensors, and would like to know if its possible to modify the Ping object so that the trigger pulse increases from 2 us to 10us? if so how?

ratronic · 2012-10-09 17:32

nvale55 I do not know the sensor you describe but about the shortest delay you can specify in Spin is ~9.2us "waitcnt(381 + cnt)" with spin overhead. And it takes about 8us to go from one outa to the next in Spin. Here is the scope output of the code I listed. Maybe one of the experts here will pop in and let you know if this can be done in Spin instead of PASM.

Con                                                         
                                                         
  _CLKMODE = XTAL1 + PLL16X                              
  _XINFREQ = 5_000_000  
  
Var
  long a, b
Obj
   
Pub Main
  dira[a]~~   
  
  repeat
    outa[a]~
    
    outa[a]~~

useing a speeed ultrasonic sonar

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