I have the following setup. I have a hardware device connected to COM1 and COM2. In order to test it I have software simulators connected to COM1 and COM2 (RS-232 ports). These simulators receive and transmit data via my hardware device.
I need to calculate the throughput time of my hardware device. For example, if the simulator on COM1 sends a message at time A then I need to establish when it arrives at COM2, giving me Time B. The throughput is then simply B-A.
The problem I'm having is that I can't find a free serial port spy which works accurately enough for my circumstances. I've tried Sysinternals' Portmon, but it is only accurate to a second and I need to know the answer to the nearest tenth of a second. I also tried Free Serial Port Monitor, but it has inaccurate timestamping.
Any suggestions on suitable software?
