MVCOM problems

ac667788 · Post by **ac667788** » Wed Sep 19, 2007 11:21 pm

Can't transmit 0x00 across serial bus

MyBuffer1.s = Chr(2) + "L" + Chr(0) + Chr(0) + Chr(1)
If ComWrite(Hcom, @MyBuffer1, Len(MyBuffer1)+1)
Debug "Write Ok"
EndIf

No matter what I do, I can't Chr(0) to eb transmitted out of the serial port.

DoubleDutch · Post by **DoubleDutch** » Wed Sep 19, 2007 11:59 pm

Have you tried poking into the string?

PokeB(@MyBuffer1+2,0)
PokeB(@MyBuffer1+3,0)

That may work?

ac667788 · Post by **ac667788** » Thu Sep 20, 2007 1:23 am

it's still acting funny, inconsistently sends out the 0 value

JCV · Post by **JCV** » Thu Sep 20, 2007 4:30 am

Try. Im in cafe.

Code: Select all

buffer = AllocateMemory(5)
PokeB(buffer, 2)
PokeB(buffer+1, asc("L"))
PokeB(buffer+2, 0)
PokeB(buffer+3, 0)
PokeB(buffer+4, 1)
If ComWrite(Hcom, buffer, 5)
Debug "Write Ok"
EndIf

citystate · Post by **citystate** » Thu Sep 20, 2007 6:51 am

ac667788 wrote:MyBuffer1.s = Chr(2) + "L" + Chr(0) + Chr(0) + Chr(1)

PB terminates strings with Chr(0) - I think this could be your problem, try JCV's code

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