Tiny, isolated USB to Xcvr interface (PTT, Audio, CAT, …)
I will descvribe here the USB interface between the redio station and the computer which I recently developed and tested. This post is a continuation of the first part, where I described a simple interface for controlling two digital lines using the USB / Serial Converter, where I presented simple interface to control two digital signals (e.g. PTT and CW). This time I will describe an interface that combines more functions:
- Controlling several digital (switching) inputs and outputs,
- Interface for controlling the station via the serial interface
- Audio input and output interface (sound card)
I had some implementation issues with the microcontrollers and USB virtual com ports, which I have described in detail in the previous contribution, I decided it’s better using the tested solutions. The block diagram of the interface is swhown in following picture:
Block diagram of the interface
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