It is a fact that the TXBC is not functional however even our ppp examples opens the specified serial port with RTS/CTS hardware handshaking with no problems. For example: Given that we are using hardware handshaking, if the modem is not connected or not turned on, the CTS line going into the NET+ARMs serial port will NOT be turned on, resulting in the modem init string and modem dial string to be stored in the serial driver's write buffer, but not transmitted. Thus, there is no 'functioning' device connected the serial port that will toggle the CTS line to tell the serial port to send data. To test the DMA operation, add ' O_DMA' in the open statements for com0 and com1 and be sure to use hardware handshaking when setting up the com port registers. Aug 13, 2003 by Seasoned Professional ( 215 points).

To open the port is not the problem I think. What I do is to set the RTSRX and the CTSTX bit in control register A and also the RTS bit. When I open the port the RTS line goes active - what is correct so far. Twonkymedia Server Serial Key. Now I can send data (CTS is also active), this works fine. But.when all data is sent the RTS is still active. What's missing or wrong.

Gets or sets the handshaking protocol for serial port transmission of data using a value from Handshake. The SerialPort class supports the following encodings. Serial Data standards: Serial data standards RS422 RS449 RS485 20 mA current loop The most common method of handshaking that is used with RS2332 is to employ the hard wired option. However it is also possible to use software codes embedded within the data, thereby saving the use of the additional lines required for hardware handshaking. Serial Call and Response (handshaking). Serial Call and Response Language. // Print a list of the serial ports for debugging purposes. How to use the RS232 COM port to interface instruments to the PC. Hardware and software handshaking, Xon, Xoff and flow control explained.

I assume that this is related to the TXBC bit because this is exactly the moment to turn off the RTS line - all data sent, transmit buffer closed. Perhaps I'm really doing something wrong, could you please send me the ppp example (I'm not using NetOS). Aug 14, 2003 by anonymous. Origin Of Symmetry Rapidshare.