Re: [oopic] Re: SRF02 on an OOpic-R

Hi Richard,

Thanks for the reply.

Yes it is wired uplike that.

Good idea about seeing if I can get the software revision
from location 0.

I think I'll have to invest in a display ... Should make
Debugging easier :)

All the best.

Richard
----- Original Message -----
From: "rtstofer" <rstofer@pacbell.net>
To: <oopic@yahoogroups.com>
Sent: Saturday, December 22, 2007 7:47 PM
Subject: [oopic] Re: SRF02 on an OOpic-R

> --- In oopic@yahoogroups.com, "richard6406" <richard@...> wrote:
>>
>> Hi Folks,
>>
>> Am new here ( and to robotics ) so please bear with me :)
>>
>> I recently got an OOPic-R board and have so far had no problems
> with
>> a few small programs ( switching LED's / buzzing / running servos
> and
>> running a Motor controller ) But I am now trying to connect an
> SRF02
>> Ultasonic range finder ( http://www.robot-
>> electronics.co.uk/htm/srf02techI2C.htm ).
>>
>> The simple program I have is :
>>
>> Dim Sonar As New oI2CM 'Sonar object
>> Dim Servo As New oServo 'Servo object
>> Dim Range As New oByte ' Range variable
>>
>> Sub Main()
>> ooPIC.Delay = 500 ' 5 sec delay before start
>>
>> '~~~~~~~~~~~~ Set Up Sonar~~~~~~~~~~~~~~~~
>> Sonar.Node = 112 ' Decimal of Hex address 0xE0 shifted by 1
>> Sonar.Mode = cv10Bit ' I2C mode as 10-Bit addressing.
>> Sonar.Width = cv8Bit ' 1 byte wide transfer
>> Sonar.NoInc = 1 ' Don't increment
>>
>>
>> '~~~~~~~~~~~~~ Set up Servo ~~~~~~~~~~~~~~~~
>> Servo.IOLine = 31 ' Use line 31
>> Servo.Adjust = 28 ' Center
>> Servo.Operate =cvTrue ' Start servo
>>
>>
>>
>> Do ' Continuous loop
>> Sonar.Location = 0 ' Command register
>> Sonar = 81 ' Set ranging to cm
>> ooPIC.Delay = 7 ' Wait to give sonar time
>> Sonar.Location = 2 ' Just get high Byte
>> Range = Sonar ' Get Range
>> Servo = Range ' Move servo
>> ooPIC.Delay = 50 ' Wait 500ms
>> Loop
>>
>> End Sub
>>
>> Did this just to try and read the high byte and move a servo to
> show
>> I'm getting a signal every half second.
>>
>> When this runs the servo moves slightly forward and back at half
>> second intervals but the sonar does not seem to be firing ( no led
>> blink, only the long blink on power up ).
>>
>> I'm sure this will be the first of many questions :)
>>
>> Wishing you all the best.
>>
>> Richard
>>
>
> Do you have it wired like: http://www.robot-
> electronics.co.uk/htm/srf08oopic-r.htm ? It should be quite similar
> if not identical.
>
> It would be worth reading register 1 to be certain you get 0x80
> back. If not, you aren't communicating.
>
> So, the unit measures to 6 meters or 600 cm. Then 600 cm / 256
> (masking out the low byte) means the upper byte only varies between
> 0 and 2. That won't make much of a movement.
>
> Richard
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>

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