serial on Mac & Windows

[Dick_Bierman]

I have a problem to get a serial port read on windows while it works on Mac.
I initialize as follows:
W_serial.Serial1.SerialPort = system.serialport(rng_portnumber) ‘ i detected the port number by looking at the names
W_serial.Serial1.DTR=false
W_serial.Serial1.Baud=W_serial.Serial1.Baud9600 // or 2
W_serial.Serial1.Parity=W_serial.Serial1.ParityNone // or 0
W_serial.Serial1.Bits=3 //8 bits. //
W_serial.Serial1.Stop=W_serial.Serial1.StopBits15 //or 1

then when needed I switch on the port with:
dim status as Boolean
status = W_serial.Serial1.open
W_serial.Serial1.DTR= true

and start polling the port:
while data_available_flag =false
W_serial.Serial1.poll
wend
with the dataavailable event reading the port:
data_available_flag=false
serial1.DTR =False 'don’t ask further data
true_rbyte = serial1.read(8)

This works fine but not on windows. However the following works on windows (showing some superiority of matlab?)
rng = serial(‘COM7’);
fopen(rng);
random_byte = fread(rng, 1);

Note that the COM7 port is associated with the port number I use in the XOJO code.

Who has any idea what I am doing incorrectly?

[Tim_Hare]

Any time you change the line state (or other properties) while the port is open, you must call Reset.

http://documentation.xojo.com/index.php/Serial.Reset

Changes to the serial device are queued so that you can modify multiple properties of it without them all taking effect immediately. For instance, you can set the baud, parity and stop bits as one operation instead of three. The same thing applies to the line state properties. Once you’ve made all your changes, you need to call .Reset on the serial device to reset the device to the new settings.