RDS/RBDS FM receiver (external) for traffic conditions

2007-11-18 Thread Joshua Layne
Hi All, A lot of my personal interest is in context-aware aps (particularly with the embedded GPS) and (unfortunately) I spend a fair bit of time in my car each day. It would be really nice to get traffic updates to the neo as an enhancement to any mapping/navigation programs. and *no*, this

Re: RDS/RBDS FM receiver (external) for traffic conditions

2007-11-18 Thread Doug Sutherland
Josh, I have the USB FM radio stick. A USB audio device does appear when it's plugged in. However, there is no audio until the FM radio app is run. This does SPI communication with the SI4701 to init and change its settings. They claim it uses standard USBaudio for the sound and that they use

Re: RDS/RBDS FM receiver (external) for traffic conditions

2007-11-18 Thread Doug Sutherland
A USB audio device does appear when it's plugged in. However, there is no audio until the FM radio app is run. This does SPI communication with the SI4701 to init and change its settings. Yikes that was a poor description. Let me try that again. There is a micrcontroller onboard the USB FM

Re: RDS/RBDS FM receiver (external) for traffic conditions

2007-11-18 Thread Joshua Layne
Doug Sutherland wrote: Josh, I have the USB FM radio stick. A USB audio device does appear when it's plugged in. However, there is no audio until the FM radio app is run. This does SPI communication with the SI4701 to init and change its settings. They claim it uses standard USBaudio for

Re: RDS/RBDS FM receiver (external) for traffic conditions

2007-11-18 Thread Doug Sutherland
Josh wrote: I have always thought of HID as using an external device that then communicates to the computer, this is using a virtual app on the computer to control an external device - I don't disagree that it is Human Interface. Aside from keyboards and mice, this idea is exactly what

Re: RDS/RBDS FM receiver (external) for traffic conditions

2007-11-18 Thread Joshua Layne
Doug Sutherland wrote: Josh wrote: I have always thought of HID as using an external device that then communicates to the computer, this is using a virtual app on the computer to control an external device - I don't disagree that it is Human Interface. Aside from keyboards and mice,

Re: RDS/RBDS FM receiver (external) for traffic conditions

2007-11-18 Thread Doug Sutherland
Josh wrote: One of the apparent weaknesses of the Si USB dongles (from my armchair research) is the antenna connection - it might be nice to have a mini SMA or something (with the standard FM resistance -- 75 Ohms?) Yeah the USB FM Radio stick has a wire sticking out, that is the antenna.