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+--- Thema: readserial fail (bug ?) (/thread-293.html)
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readserial fail (bug ?) - plouf - 13.03.2025
ok, i know this a "try and miss" but i try, if anyone has any idea
i am trying to read data from serial, data is random (pure binary)
i have unexpeded fails in random times.
i have try to track it down as much as i can and i came in this
the following stream of data ALWAYS fail reading and ALWAYS fail reading the same byte "$7F$7F$FE$0C$40$00$11$62" (hex bytes)
always miss $11 (decimal 17)
i have rewrite my code in ACE basic, and works as it should, i also have test it real amiga500/os1.2 and fails the same as in winuae
here is a screenshot side by side amiblitz/ace
image blitzbasic FAIL
the problem is in blitzbasic2.1 as well too
this is the code i use for above test
Code:
; PROBLEMATIC STREAM TO SEND $7F$7F$FE$0C$40$00$11$62
isserial = OpenSerial("serial.device",0,9600,0)
NPrint isserial
WriteSerial 0,55
VWait 200
For i=1 To 10
serin.w = ReadSerial( 0)
Print Hex$(serin)
NPrint " - ",serin
Next
CloseSerial(0)
EndRE: readserial fail (bug ?) - plouf - 13.03.2025
ok, replying to myself... char $11 is xon xharacter have to turn it off via
OpenSerial("serial.device",0,9600,128);
btw to not open a new thread, can somehow check how many bytes are waiting in serial buffer ?
RE: readserial fail (bug ?) - hackball - 13.03.2025
ReadSerial() returns 0-255 as byte (unsigned, so use a .w) or
-1 for nothing.
So you can check for that.
RE: readserial fail (bug ?) - plouf - 13.03.2025
thats how i do it, but having know bytes from before helps in calculation
RE: readserial fail (bug ?) - hackball - 13.03.2025
there is the FastSerial lib from RWE, it has a CheckSerial() function.
BUT, it is meant for games, as it avoids the systems interrupt etc. to allow faster speeds.
RE: readserial fail (bug ?) - plouf - 13.03.2025
is there any very simple example to use this ?
i try and fail
RE: readserial fail (bug ?) - hackball - 13.03.2025
I've found the source code for the serial lib, dunno who made it. it's v1.0 1994.
But it looks like it does not take any arguement for the device name, instead it opens the device somehow via internal variables, maybe something i can find in the dev notes.
anyways, it has
SerialProgress()
SerialSendFile()
SerialGot()
etc. commands in it, maybe i compile it later, see what it's up to. don't have anything serial setd up atm.
RE: readserial fail (bug ?) - hackball - 13.03.2025
(13.03.2025, 17:43)plouf schrieb: is there any very simple example to use this ?
i try and fail
what exactly?
The FastSerial?
RE: readserial fail (bug ?) - plouf - 13.03.2025
anyways, it has
SerialProgress()
SerialSendFile()
SerialGot()
where are these ? cant find in either bb2 manal neither fast serial
yes example about FastSerial
RE: readserial fail (bug ?) - hackball - 13.03.2025
Those commands are in a serial lib i just found in my developer docs, as source code.
i need to look into this myself first too.
What BlitzBasic installation do you have? There is an UltimateBlitz which has all the extra libraries.