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In lugnet.robotics.nxt, Ralph Hempel wrote:
> Christian Mock wrote:
> > Hi,
> > has anybody successfully tried to read ports from I2C connected PCF8574 with
> > pbLua (Beta-8) ?
> > Writing and setting ports is no problem, but reading ports fails. The return
> > value is every times 0 (not NIL)
>
> No ideas yet, Christian. I do have a Mindsensors kit here to look
> at over the weekend. Are you SURE you are sending the correct string
> to read the registers?
>
> Can you post the code you're using for the test here?
>
> Cheers, Ralph
Hi Ralph,
we are using this code:
collectgarbage( "setpause", 110 );
function setupI2C(port)
nxt.InputSetType(port,2)
nxt.InputSetDir(port,1,1)
nxt.InputSetState(port,1,1)
nxt.I2CTimer(3)
nxt.I2CInitPins(port)
end
function ReadPCF(port)
nxt.I2CSendData( port, string.char(0x73),1, 1 )
while( 0 ~= nxt.I2CGetStatus(port)) do
end
s = nxt.I2CRecvData( port, 1 )
print( "Daten " .. s )
end
setupI2C(4)
ReadPCF(4);
Do you think, we have to read I2C address more often ? Like ultrasonic sensor ?
The first read result of ultrasonic is allways 0.
Thanks for more :D
Bye
Christian
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Message has 1 Reply:
Message is in Reply To:
 | | Re: pbLua PCF8574
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| (...) No ideas yet, Christian. I do have a Mindsensors kit here to look at over the weekend. Are you SURE you are sending the correct string to read the registers? Can you post the code you're using for the test here? Cheers, Ralph (17 years ago, 19-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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