SDR (Software Defined Radio) » OsmoSDR

= Firmware build =

 * check out at91lib.git and osmo-sdr.git into the same ancestor directory

 * change to osmo-sdr/firmware/sdr-test-project

 * 'make flash'

 * use rum-ba to flash it:

  * rumba /dev/ttyACM0 flashmcu osmo-sdr-test-osmo-sdr-at91sam3u4-flash.bin

= Firmware usage guide =

== Serial console ==

On the serial console, you can enter three types of commands:

 * actions denoted by ! at the line end

 * getting a value, denoted by a ? at the line end

 * setting a value in key=value notation

A list of commands can be obtained by entering ? on an empty line

Enter always re-sets the parser, so you can abort any unfinished command with enter

=== Examples ===

{{{

tuner.init!

tuner.freq=88300000

tuner.gain=2,2,2,2,2,2

ssc.start!

}}}

=== Reference ===

{{{

?

Supported commands:

tuner.init Initialize the tuner

tuner.freq Tune to the specified frequency

tuner.gain Tune to the specified gain

si570.freq Change the SI570 clock frequency

si570.dump Dump SI570 registers

fpga.dump Dump FPGA registers

ssc.start Start the SSC Receiver

ssc.stats Statistics about the SSC

}}}

== Taking a capture ==

 1. flash the firmware

 1. connect the device to usb, it should enumerate as usb audio device

 1. connect to the UART

 1. issue the following commands once

   1. {{{tuner.init!}}}

   1. {{{tuner.freq=88300000}}}

 1. start your audio recording app, e.g. {{{arecord -c 2 -f S16_LE -D hw:1,0 foo.wav}}}

 1. quickly enter ssc.start!

The bottom green led under the antenna socket should be dark green, not completely off.