Release 1.1b of the library

New feature: USB console. It is possible to set parameters using minicom or other terminal.

TODO:

• load .uf2 file from /bin/ directory of the project
• start minicom -D /dev/ttyACM0 (or something other)
• enter 'HELP'
• enjoy.

Release 1.0 of the library

The major change is:

The max. frequency is moved from 9.4 MHz to ~32.333 MHz which is sufficient to cover shortwave band of radio spectrum (3...30 MHz) entirely. The role of GPS receiver increases: absolute frequency shift (in Hz) due to Pico CLK shift has become much more prominent.

Nevertheless, I successfully tested some WSPR tx using this library with GPS option turned off.

Release 0.9 of the library

The cornerstone improvement: GPS reference frequency synchronization has been added (optional, when hardware is available). This option provides long-term frequency stability about 0.5 ... 1 ppm depending on GPS service availability and satellite constellation geometric factor (GDOP).

Release 0.3 of the library

Bugfix: an essential cmake script was missing. Corrected.

Release 0.2 of the library

• milliHertz frequency setting.
• additional tests of various signals: RTTY, Wide4FSK, 900 milliHertz hopping.
• prepared UF2's of tests ready for use.

Initial release of the library

The DCO generates a signal of any frequency ranging from 1.1 to 9.4 MHz with 1 Hz resolution.