0100,0100,0100On 25 Nov 2001, at 18:25, ldean@metrowerks.com wrote: 7F00,0000,0000> --- In buildcheapeeg@yahoogroups.com, "Moritz von Buttlar" < wrote: > > I'm still thinking about an IrDA EEG device, using some kind of > simple IrDA software protocol and IrDA hardware. Maybe you could find > out if it's possible to get some simplified protocol working using > IrDA hardware ? > > I have been looking into IrDA for EEG. There is a simplified protocol > called IrDA Lite which represents the bare minimum needed to comply > with the IrDA standard. IrDA Lite limits the baud rate to 9600 and > limits packet size to 64 bytes. Hi Laura ! Thank you for your work. That's about what I found out about this problem. But last week I found the perfect microchip for this problem. It's a device that gets ordinary serial data in and then directly connects to a IrDA physical transceiver. Inside the chip IrCOMM is implemented, a protocol that emulates a serial link over IrDA. There are IrCOMM drivers readily available for most operating systems. Therefore, in order to make our eeg IrDA compliant, all we have to do is put in this chip by Arizona Microchip (5$). On the host pc software side something called a virtual com port is provided by the drivers which can be programmed just like a real com port. It has the following advantages: - perfect optical isolation for maximum security - probably same price as current version that uses 2 optocouplers, MAX232, cable - maybe easier to fulfill safety norms Moritz ---------------------- Moritz von Buttlar moritz@v...