#define GOERTZ_NOISE_BLANKER_INITIAL_MS 6 Goertzel.h contains several settings: #define GOERTZ_SAMPLING_FREQ 8928.0 The DSP audio tone decoder requires two library files: goertzel.h and goertzel.cpp. When using this option the input pin is cw_decoder_audio_input_pin itnmust be an analog pin, such as A1, A2, A3, etc. The code used in the CW keyer was originally written by Hjalmar skovholm Hansen, OZ1JHM and is described further on his project web page. This option compiles in a Goertzel DSP audio detector. To activate the audio tone decoder in software, activate OPTION_CW_DECODER_GOERTZEL_AUDIO_DETECTOR. Drive it low (0V) when there is a CW signal, and high (+5V) when there is no CW tone. If external tone decoding hardware is used, cw_decoder_pin is a straight digital input. The CW decoder can be interfaced two ways: External Tone Decoder Hardware This is especially useful with the DSP Audio Decoder described below, driving an LED indicator. If you wish to have a indicator to assist in tuning in the CW signal and setting levels, define this output pin: #define cw_decoder_indicator 24 The input pin for the CW decoder is defined in keyer_pin_settings.h: #define cw_decoder_pin A11 The decoded character are displayed in both the Command Line Interface (CLI) and LCD display, whichever is configured. Arduino automated antenna switch, CW Keyer, Automatic Antenna Tuner, RF PWR and SWR Meter, APRS Tracker, Beacon Controller, antenna switch, Rotator Controller, Arduino as an SDR.The keyer can be configured to decode off the air CW using FEATURE_CW_DECODER. This link has been featured in the following Articles:Ī selection of the best amateur radio projects based on Arduino. So far received 12 votes for a total score of 7.49/10 This link is listed in our web site directory since Monday Feb 10 2014, and till today " Arduino CW Keyer" has been followed for a total of 5071 times.
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