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Re: Different Nano's
I downloaded the Nano Every Board setup into the Arduino IDE and tried to compile my firmware sketch.
It failed on digitalPinToPCMskbit() which converts a digital pin ID to the appropriate bit in the output register. But more severely, it failed on the low level writes that I was using to set up timers: TCNT2 TCCR2A WGM21 OCR2A TIMSK2 CS22 | CS21 | CS20 Doing some online research, it looks like the timer setup is different. 73, Mark, N8ME |
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Re: Frequency calibration on a lab
#bfo
#calibration
#frequency
Very good HAM setting, used only one instrument, but is not the best for laboratory setting, you not have any referent to the real frequency received; the error is very low, but is possible make something of better in a laboratory.
73 de
--?
IW4AJR Loris |
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Re: WSJT-X 2.2.2
Dean,
My code is a little different. In setup(), it calls Serial.begin() and Serial.flush() like your code. My CAT handling is done in a Serial.event() function. This is called whenever there is a character available to read (or so says the documentation).? void?serialEvent(void)?{
??long?frequency;
??byte?temp1,?temp2;
??int?c?=?Serial.read();
??if?(c?>?-1)?{
????cmd_buffer[cmd_byte_ct++]?=?(byte)?c;
??}
??if?(cmd_byte_ct?==?5)?{
????cmd_byte_ct?=?0;
?
Then process the command. cmd_buffer is a 5 element byte array. cmd_byte_ct is a global variable initially set to 0. My original code was like yours in that it assumed that if Serial.available() returned 5 or more that Serial.read would always be able to read 5 bytes (I actually used Serial.readbytes(buffer, 5), but the way my program behaved, I'm not sure that was a valid assumption.? With a few hours testing WSJT-X versions 2.1.2 and 2.2.2 and with FLDigi (using hamlib) it seems to work, after a firmware upload or after a power cycle.? It was a little less reliable until I added the Serial.flush() in setup(). Thank you for that idea. 73, Mark, N8ME 73, Mark, N8ME |
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Re: WSJT-X 2.2.2
I found a bug in my code based on a misunderstanding of the Arduino Serial library. I rewrote my code to take that into account and it looks like WSJT-X 2.2.2 (with the newer Hamlib) is working. That's when I choose the FT857 setup. I still have an issue when I use the FT817 with rigctl-wsjtx that it doesn't seem to send any messages or commands to the radio.
73, Mark, N8ME |
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Re: Frequency calibration on a lab
#bfo
#calibration
#frequency
Thanks Loris,
You explained very clearly! I have access to some laboratory equipment on a limited basis, so knowing in advance which method will be better suited grants me the better use of them! 73 de PU1OWL Rafael |
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Re: Different Nano's
Mark - that's right - I forgot about the connector - as you can see I don't have that problem with my homebrew rig - hi, hi!
? Not sure what the port on the V6 looks like from the inside - what I did on my V5 (which did not come with a case) is just cut a patch cable in half and connected up the TX, RX, 5V and GND to the back side of a USB 2 jack.? Search ebay for "usb micro to a female panel mount" and a bunch come up. Dean KK4DAS Dean KK4DAS |
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Re: Frequency calibration on a lab
#bfo
#calibration
#frequency
P.S. Rafael,?
the laboratory measurement of the BFO is a little more complex operation, you consider that CLK2 is fixed to receive the USB, so it must be 1.5 KHz lower than the center frequency of the quartz filter, considering again that it is impossible obtain perfect filters using a Ladder Filter with quartzes that have the same frequency and fixed capacitors, for the reason that the quartzes are slightly different from each to other and the capacitors have a factory tolerance, so the quartz filters will be different for each ?BITX sold,
A laboratory measurement method is to firsth obtain the attenuation curve of the filter using a network analyzer (using the two connectors for the additional CW filter) and find the two attenuation frequencies at -3dB; calculate the bandwidth and find the frequenzy of center of your filter; turn on the ?BITX and measure the CLK2 with a good frequency meter, calibrate the BFO frequency by fixing it as exactly as possible at a frequency equal to -1.5KHz with respect to the central frequency of the filter.
This should be the measurement method theoretically, but I have not used it, so I cannot guarantee the final effect of the sound in the loudspeaker, when you listen to a signal on the antenna.
73 de
IW4AJR Loris |
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Re: Frequency calibration on a lab
#bfo
#calibration
#frequency
Hi Rafael
Pay attention to USB and LSB, in the ?BITX-V6 the CLK2 is fixed, while the CLK1 switches from about 57 MHz to about 37MHz according to the selection of the side band used.
The documentation released for the tarutures, not surprisingly (albeit a bit impirically) is based on the measurement of the BF to calibrate the BFO and on the zero beat for the calibration of the VFO.
If you have RF instrumentation, the BF measurement method is certainly valid for VFO calibration, therefore, set the frequency of the RF oscillator to exactly 10MHz, in the TEST menu choose the VFO calibration, do the zero beat with the VFO, move the RF oscillator at 10.001,500 KHz, read the output frequency from the speaker with a good frequency meter and correct the calibration to read exactly 1,500 Hz (I managed to center the frequency of the VFO within +/- 0.01-0 , 02 Hz) exit calibration and turn off the ?BITX, turn it back on and follow the instructions in the documentation to calibrate the BFO (to center the quartz filter) ... that's it.
73 de
IW4AJR Loris On Mon, Jan 4, 2021 at 03:58 PM, <rafaelgcpp@...> wrote:
Hi folks, ? -- |
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Re: Different Nano's
I just noticed that the Every has a USB micro connector as opposed to the mini on the Nano. That means that the extension cable that brings the USB from the Arduino out to the back panel of the uBITX 6 won't work. Does anyone have a source for a similar extension cable for the micro connector?
For those unfamiliar with the uBITX 6, it comes with a USB mini male to mini female extension cable that mounts to the rear panel of the enclosure. 73, Mark, N8ME |
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Re: Different Nano's
Dean,
Thanks for the info.? I see that the Every has 48k of flash vs 32k in the plain Nano. Did that equate to 16k more program space? The documentation from Arduino says that it's pin for pin compatible.? I'm using my own interrupt code for the rotary encoder, so it shouldn't be too different to adapt. 73, Mark, N8ME |
Mark Erbaugh
Loris Bollina
Rafael Pinto [PU1OWL]