perl - Win32::Serial Binary Communication -

i trying communicate uart on embedded system using win32::serial port (perl module). seems work fine in terms of sending data, ever reason unable receive data. hoping there function besides read() show read data?

# write serial data port in little endian form foreach $intermvalue (@writedata) {     $msb = int($intermvalue/256);     $lsb = ($intermvalue - $msb*256);      # writing lsb first , msb after (little endian form)     print "writing: lsb: ".$lsb." msb: ".$msb."\n";     $class->{"serialport"}->transmit_char($lsb);     $class->{"serialport"}->transmit_char($msb); }  # read data serial port ($countin, $recieveddata) = $class->{"serialport"}->read($expectedbytes); 

thanks

thanks reply, turns out there input function in library, using , 1 second sleep able make module work.

# write serial data port in little endian form foreach $intermvalue (@writedata) {     $msb = int($intermvalue/256);     $lsb = ($intermvalue - $msb*256);      # writing lsb first , msb after (little endian form)     print "writing: lsb: ".$lsb." msb: ".$msb."\n";     $class->{"serialport"}->transmit_char($lsb);     $class->{"serialport"}->transmit_char($msb);     }     # read data serial port     sleep(1);      $recieveddata = $class->{"serialport"}->input;