Need help setting up my ultrasonic distance sensor

[Acetronics2]

Hi,

The question is ...

did you use a RS232 chip on YOUR board ??? ( like in the datasheet scheme )

more ...

Could you , please , attach YOUR scheme ???

Alain

[Megahertz]

Hi,

The question is ...

did you use a RS232 chip on YOUR board ??? ( like in the datasheet scheme )

more ...

Could you , please , attach YOUR scheme ???

Alain

Hi, here is my hardware photo, just my sensor jumpered to my PICKIT2 in the following configuration:
; PortC.0 = PWM Receive ; ; ; ; ; PortA.0 = Receive Pin ; ; ; ; PortA.1 = Transmit Pin ; ; ; ; PortA.2=Trigger Pin
PWR_ON is directly connected to 5V on the PICKIT2
Also I am using TTL I/O, I have arranged the jumpers accordingly.

[Acetronics2]

Hi,

OMG ...

I also think you are exceeding the Pickit sourcing authorized current ... Especially when " pinging " ...

Alain

[Megahertz]

Hi,

OMG ...

I also think you are exceeding the Pickit sourcing authorized current ... Especially when " pinging " ...

Alain

Oops! will try everything again with seperate supply and update here. May be this is the reason that it is not working.

[Megahertz]

OK, I tried with this approach and it works, but as you will see in the code, even though the object is under 5 meters away (for eg. 4meters), PORTC.2 goes high & does not toggle. Is there something wrong with my calculation. It is working fine upto 1 meter. LED connected to PortC.2 does alterate it's toggling speed depending upon how far is the object under 1 meter. My latest code goes like this:

; Phase2: RA0=TRIG (OUTPUT) ;;;;RA1- PWM (INPUT)
w1 var word

pause 500
main1:
w1=0
High PortA.0
pause 1
Low PortA.0
pause 1
High PortA.0

main:
Pulsin PortA.1,0,w1
if w1>500 or w1=0 then 
		high PortC.2
	else
		toggle PortC.2
			pause w1
	endif
goto main1
end

[Acetronics2]

Hi,

Everything works as written ...

W1 = 500 is a distance of 1 meter ...

...

try 2500 instead ...

and note no measure will send back ... 5000 Pulsin units ( 50 000 µs )

Alain

[Megahertz]

Hi,

Everything works as written ...

W1 = 500 is a distance of 1 meter ...

...

try 2500 instead ...

and note no measure will send back ... 5000 Pulsin units ( 50 000 µs )

Alain

Hi, it works fine with 2500. Can you please explain how you calculated 2500? Thanks