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1. #GORTZEL CW DECODER SOFTWARE#
2. #GORTZEL CW DECODER CODE#
3. #GORTZEL CW DECODER DOWNLOAD#
4. #GORTZEL CW DECODER FREE#

#GORTZEL CW DECODER SOFTWARE#

I had been slowly working on migrating my keyer software from the 8-bit chips to the 32-bit chips, but got sidetracked by Hjalmar!

#GORTZEL CW DECODER FREE#

Most things are done in interrupt routines and even with the high sampling rate I am using, there is till lots of free time available. There is plenty memory, so it is just a matter of CPU time and I think there should be plenty of that also. I suspect I should be able to add a keyer/keyboard in the same chip. I am sure I will have lots of features to slowly add and work on. So far I am pleased with the performance. I still need to add automatic level control and support special characters like AS, BT, etc. I finally worked on auto speed tracking today so it now can track speeds from 10 WPM to 125 WPM (my test source, a keyer/keyboard) only covers that range and I think it should be adequate :) The test signal of course is "perfect", no QRN/QRM/QSB, so I am only testing the decoding and speed tracking under ideal conditions (except for the one off the air test mentioned below). I migrated Hjalmar's project to a ChipKit Max 32 board (32-bit chip, 80 MHz clock). Reply by Chuck Broadwell, W5UXH on Septemat 8:49pm

#GORTZEL CW DECODER DOWNLOAD#

It will be very simple for others to download the software to an Arduino and have fun with your project. I need to optimize the tone frequency and level (at 600 Hz my input signal is only 1.6Vp-p) and see to what speed I have perfect decoding when the input is "perfect". With the "perfect" CW input from a test message sent by the keyboard, I have perfect decoding up to 30 wpm. Neither is as close to your 558 Hz or 744 Hz frequencies, and I expect it will work even better when optimized and with a higher input amplitude. At 600 Hz, my output p-p level does not drop as low as at 750 Hz but neither 600 or 750 is optimum. I can vary my tone from roughly 600 Hz to 750 Hz. So my output amplitude peaks near that QRG. This is a preliminary test because I use a Hi-Per Mite filter on my sidetone, centered around 648 Hz. I used a "pure" sinewave sidetone from another keyer as the CW test source. I converted one of my keyers (that already had the LCD interfaced to a ATmega328P chip) to try it out.

#GORTZEL CW DECODER CODE#

Here you can find an other danish ham which have been working on the code Here a project from a oz1edr oz1edr.dk/Arduino%20Uno/CW%20dekoder/Arduino%20CW.htmĪnd another link and in a USA ham newspaper project Hjalmar. Here you can see Mr.Chiba very fine website /entry/2015/28Īnd here you can see how JA9MAT Hidehiko build it with chinese letters Download Mr. Here you can download the code : Download version 1.1 Right click on the mouse and chose save as. If you get a lot of noise in when you have your volumen on the prefereed place then set the 2 values up with 50. here they are 100, if your transiver shall be turned up to get the decoder working then set the values down. Go 50 up or 50 down with both of them in same time. If you have trouble with the audio is to high og to weak yo can try to set the 2 values for magnitude. NOW YOU CAN USE THE DECODER WITHOUT ANY MORE MODIFICATIONSīut if you want another center frequency you and want to change how wide the filter shall be, you have to change the following lines also.īe aware of that you can only chose some excact frequencies and only a specified number of samples.įor a start take the n=48 ( testdata ) and then you can chose 558 hz or mabye 744 hz which are good for recieveing. Then you have to set which pin you use for AudioIN and which pin you use for the Led. Tell the liquidcrystal library which pins you use for the display and underneath that which kind of display you have just connect and then the code will manage when you have done the setup. The code can take different kinds of displays 2*16 or 4*16 or 2*20 or 4*20. Just 2 10k resistors betwen gnd and 5 volts and then a capacitor in serie with the audio signal. A Arduino UNO board and a LCD board and then a few components. You can read about the goertzel formular here :Ĭourses.cs./courses/cse466/12au/calendar/Goertzel-EETimes.pdf Hardware build by OZ2HNS for use in our clubstation OZ8SMA Here is a video where you can see the decoder in function. The magic in this code is the tone detection based on the goertzel formular, which means that you just put in the audio on an analog pin and then the processor make some calculations and if there is a tone you will get a magnitude value. If you want to build a cw decoder without using other active components than an atmel 328 - Arduino UNO, then this is sure something for you. EASY BUILD CW DECODER BASED ON DSP GOERTZEL CODE