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1. Linux send binary data to serial port install#
2. Linux send binary data to serial port 64 Bit#
3. Linux send binary data to serial port code#
4. Linux send binary data to serial port password#

Are you running the QNX O/S in 32 or 64 bit mode? I ask this and the prior question because maybe waverec is compiled for the wrong mode or you grabbed the 32 bit exe instead of the 64 bit exe and that is why it only partially is working (8 bit mode).

Linux send binary data to serial port code#

Did you compile it yourself from the QNX source code (which I found by googling) or did you get the binary image from QNX.

Linux send binary data to serial port password#

I just want to make sure you didn’t put the password stuff in the boot image itself (which is read only).

Can you post your QNX build file (the one you used to build the QNX.If you are able to do so, what do the file permissions in /etc and /etc/pam.d look like.Are you able to write/delete/edit anything on your QNX filesystem?.This sounds like your QNX filesystem is mounted as ‘read only’. With regards to not being able to change the password:.It would be helpful if you provide ideas about audio recording and password changing and serial port data receive. In VM ware, we are able to change the password.ĭoes the issue related to any read file system issue? Getting error as "Sorry authentication token busy ". Password changing - Not able to change the user account password using “passwd” utiltiy.Not able to record audio using “waverec” command and using “wave” command able to play audio file.īut in 8 -bit mode, High noise is recording.phpbbforum/viewtopi … 10&t=12915Īpart from serial port, we have below issues I have found another guy faced the same issue. In order to confirm the hardware, we have checked the same setup (hardware/cables) with Ubuntu OS and confirmed that we are able to receive and transmit properly in all 3 modes (RS232/RS422/RS485).

Linux send binary data to serial port install#

Is there a chance the actual physical serial port on your machine is bad (or the UART on the machine isn’t an 8250)? In other words do you have another serial port on that machine to try or another machine you can install QNX7 on to test or can you swap out the harddrive/CF card containing QNX for a Linux one. The cat command normally works just fine to show incoming data for me when I’m testing and your sample program looks fine too. Your stty looks quite similar to mine other than some minor differences like the imaxbel and onlcr options which should not be a problem. I’d also suggest getting 232 mode working first since that’s the easier one to work with. That’s why I asked whether you had tried a 232 cable. I’ve only got experience with 232 mode in QNX but I’ve never had any problems sending/receiving in 232 mode. Printf("read from serial port FAILED ! \n") Printf("\nReceived data: %s \n", recv_buf) Printf("\nSend back data to serial port: \n") Please find the attached image for stty settings. Currently, we are able to send data in all the 3 modes but not able to receive in 3 modes using cat and separate serial read application. We want to work in all the 3 modes (RS232/RS422/RS485) in both directions. These cables are working fine in Ubuntu OS for serial port communication in both directions. We have used separate cables for RS232, RS422, and RS485 modes. If you have a 485 cable it would explain why things are only working in 1 direction.Ĭan you post what stty says about the serial port you are trying to use. Which mode do you need to get working and which type of serial cable do you actually have (232 or 485). These are quite different (2 wire vs 4 wire). It looks weird when write is works but read doesn’t work.įYI, both applications works in Ubuntu if i changed the serial device name (/dev/ser1 to /dev/ttyS0)ĭO you have any idea for receiving data via serial port? We have confirmed the serial port settings (baud rate,parity,stop bit) using stty utility. The application waits in read call for the data. We are able to send using write application. We have created Serial port write and read application using write () and read () and observed the same behavior. Receiver command : " cat /dev/ttyS0" -Its working Transmitter command : “echo Hello > /dev/ttyS0” - Its working. Receiver command: " cat /dev/ser1" - Not working Transmitter command : “echo Hello > /dev/ser1” - Its working. Please advise the procedure for testing serial port data reception in QNX. We have followed the same procedure with same setup (boards and cables are the same) in Ubuntu OS and confirmed that its But when we try to receive the data in QNX using “cat”, it doesn’t receive any data. Regarding Serial Port testing in QNX 7.0, we are able to send data to the receiver using the “echo” command in RS232/