ADLINK cPCI-3544/3534/3538 Serial Cardcard Configuration Practice

The isolated port has no signal or sparks on the ground wire. The ground wire of the isolated device is mistakenly connected to the system ground. Confirm that the ground wire of the external device is connected to Isolated GND instead of GND

After installing multiple cards, check if the BIOS has allocated sufficient IRQ due to slow system startup, insufficient blue screen IRQ resources, or conflicting driver versions; Uninstall the old driver and reinstall the latest version

Unable to open device node under Linux. Main device number conflict or node not created. Execute mknod manual creation or rerun installation script to specify different main device numbers

Typical application cases and programming tips

Case 1: A railway signal system uses cPCI-3544 to connect 8 intelligent track sensors (RS-485), with each sensor approximately 500 meters apart. Select 2 3544 cards, set each port to RS-485 mode, only enable terminal resistors on the sensor side at both ends of the bus, and turn off the middle node. Each port is isolated independently to avoid communication interruption caused by ground potential difference of different sensors.

Case 2: A device debugging platform uses cPCI-3534, with three RS-232 ports connected to PLC programming port, touch screen, and barcode scanner, and an isolated RS-422 port connected to a remote frequency converter. All ports are working properly, please note that the isolation ground of Port D is separately connected to the frequency converter signal ground.

Programming tip: In Windows, the ports of these modules are considered standard COM ports and can be used with APIs such as CreateFile ("COMx"), AKS ommState, ReadFile/WriteFile, etc; In Linux, use standard POSIX functions such as open ("/dev/ttySx") and tcsetattr. The example code can be found in the Sample directory on the driver CD.