I have a few LAVA Quattro-PCI 4 port serial boards and a few LAVA Octopus-550 8 port serial boards. After installing the card into a standard PC running QNX 6.2.1, those LAVA Quattro-PCI 4 port serial boards work properly. However, I encountered some problems with the LAVA Octopus-550 8 port serial boards. The driver for those cards are installed following the procedures stated in the website of the manufacture(www.lavalink.com). The serial port can only receive data. Sending data to external device fails. By checking the data flow, we noticed that only the first character is sent.
Anyone knows where is the possible problems? Thanks
try disabling hardware handshaking.
Are the interrupts set up right? It sounds like you are not watching or generating the right interrupt.
Ie. On the send side, only one char goes out cause the driver is waiting for an interrupt to say there was room to send another character. On the recieve side, it is the same thing - the data is there but the driver never gets notified.
The board is using an IRQ not sharing with other devices.