SDR (Software Defined Radio) » OsmoSDR

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= OsmoSDR Hardware =

The OsmoSDR hardware consists of an oscillator, Zero-IF silicon tuner, ADC, FPGA and a USB-capable microcontroller.

The block schematics looks like this: FIXME

== Major Components ==

=== Atmel AT91SAM3U Microcontroller ===

The SAM3U is a quite powerful but inexpensive Cortex-M3 based Microcontroller.  What makes it special compared

to many other devices is its integrated USB 2.0 High-Speed device, combined with scatter-gather DMA and an internal

memory/bus architecture that can actually drive the USB 2.0 at 480Mbps without any problems.

The SAM3U [wiki:Firmware] will be available as Free Software / Open Source in our git repository.

=== Lattice XFP2 FPGA ===

The FPGA is mainly intended to interface the ADC with the SSC peripheral of the SAM3U.  However, it is reasonable

to assume it can do some simple filtering, too.

The FPGA design will be available as Free Software / Open Source in our git repository

=== Analog Devices AD7357 ADC ===

This ADC provides two channels (I and Q) and can run at up to 4.2 Megasamples / second and provides 14 bits of resolution.

=== Silicon Tuner ===

FIXME

=== !SiLabs Si570 Oscillator ===

The Si570 is a 10MHz to 1.4GHz programmable oscillator.  The exact frequency can be set and adjusted via an I2C interface.

== Status ==

As of 13 December 2011, we had the first 5 prototypes

As of 28 December 2011, we have hardware verification code and detected some bugs that need a 2nd revision