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Re: new sBitx software
Hi Evan,
That¡¯s really good news. ?I will give that a try. ?My fingers are crossed. ?Thanks! I do have a work around on the touch screen input. ?After the RPI boots, run: sudo xinput map-to-output ¡°raspberrypi-ts¡± ¡°DSI-1¡± . It¡¯s an extra step to perform after boot but it works. ?I¡¯ve thought about adding this into the boot sequence but just haven¡¯t sorted where that is and made the addition. I¡¯ll let you know how it goes. Cheers, Scott |
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Re: SBitx: Capacitor across gpio's tx line
Further investigating the TX line, I noted a 470 ohm resistor across C66.? This would put a 7ma load on the GPIO pin.? Adding the PIN diode switching 74LS08 adds another 4ma, so we are at 11ma with a maximum of 16ma recommended.??
There are 5 other loads that I did not do the calculation.? A buffer seems to be a good idea for this particular output.? Still, no problems in 400 units go against needing to make a change. 73 Evan AC9TU |
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Re: SBitx: Capacitor across gpio's tx line
Farhan,
Thank you for the answer.? I thought it was for RF issues.? The only potential issue that I thought for removing the capacitor was slowing down the TX return to off would potentially cause the TX and RX to be enabled simultaneously for a very short period. 400 radio sample is a pretty good test showing that there is not an issue. 73 Evan AC9TU |
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Re: Error Building V2
Btw, I would advise not to use my fork, unless there is a need to. Ashhar main repo it the way to go, and his "build" script will work for all common use cases.
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Rafael On 4/21/23 10:37, Rafael Diniz wrote:
Just type: |
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Re: SBitx: Capacitor across gpio's tx line
Evan, There is a very slow switching needed. I consulted my notes, the cap was installed to prevent tx latch up when the RF was getting in the TX line. In our four hundred plus radios tested by now, we haven't faced any issue related to the capacitor. However, I am removing it my own radio to see how it works. - f On Fri, Apr 21, 2023, 1:03 PM Evan Hand <elhandjr@...> wrote: Hi Gary, |
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Re: Error Building V2
Just type:
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make make install All the rest of the instructions are exactly the same, as described in install.txt. Rafael On 4/21/23 01:06, jacobs@... wrote:
Rafael, |
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Re: SBitx: Capacitor across gpio's tx line
Hi Gary,
Thank you for the links.? They do provide more information than what is on the Raspberry Pi site. I still do not understand the issue with C66.? None of the documentation lists a maximum capacitance load.? Some of the examples given in online recommendations suggest using capacitors to help reduce contact bounce, which leads me to believe that it is not that C66 is too much of a load on the GPIO output.? That means there is a circuit issue that I do not understand. 73 Evan AC9TU |
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Re: SBitx: Capacitor across gpio's tx line
Sorry to ask a stupid question, but what is the issue with C66?
It may not be a good design to delay TX to Q5 and the rest of the TX use points, but not sure it could cause damage.? I would be more worried about the many devices that use the unbuffered TX line.? GPIO guidelines say 16ma total.? Not sure what the total pulsed current would be on the TX start. 73 Evan AC9TU |
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Re: Help: uBitx V3 parallel 4 MHz narrow CW filter and firmware changes?
Thanks Mark,
That's helpful and I'll start looking at it in the weekend. I got a reply from Alex, PA1FOX as well, but he used fully custom firmware and has also built the radio from scratch! I've got the 'simple' version, just the LCD. If I get something working I'll report back (could take a while...). 73, Gerard |
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Re: SBitx: Capacitor across gpio's tx line
On Thu, Apr 20, 2023, 11:56 AM HA3HZ <gyula@...> wrote: I can't find it on the schematic. |
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SBitx: Capacitor across gpio's tx line
I have lost an email that someone wrote to me about the capacitor that is directly across the tx line of the gpio. I agree that it is a bad design, we will take it out in the next revision. It hasnt blown anyb of the 200 already tested with raspberry pis installed, but it needs to go all the same. Thanks to the gentleman who wrote in. - f |
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Re: Help: uBitx V3 parallel 4 MHz narrow CW filter and firmware changes?
Gerard,
That code should be wedged into the file ubitx_si5351.ino. The structure of the si5351bx differs slightly than the code you found and variable names are also slightly different. Perhaps this could be set in the setCarrierFreq section as there is already some tests for cwMode?? (There is even a comment out section around line 153 that tests for cwMode.)? I have tried to leave that file alone in my hacking so I am hesitant to give it a try myself. Not sure whether the change in the if req for v5 and v6? has any impact on the filter code??? The challenge is going to be creating a UX visible control for this setting. This will require mods to the unitx_menu.ino and perlas the ubitx_lcd_* and ubitx_lcd_nextion.ino (and if Nextion, you will need to add mods to the Nextion screens using the Nextion editor). You might also want to add this feature to the? cat_libs.ino file too....?? My recommendation would be to get this working as a compile parameter (#define in? ubix.h) first.? At that point, I shold be able to help you get it working in the various? points in the UX. This would be in uBTIX V2 (see ).?? I would be interested in your final design as I am trying to collect addon cards for the uBITX. (And I am also a member of CWops :-) ) 73 Mark -- AJ6CU KD8CEC 2.0, Nextion Screens,? and open source uBITX Raduino boards for Arduino IOT, BLE, RP2040, Teensy 4.0, and Raspberry Pi Pico https://github.com/aj6cu |
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Re: new sBitx software
On Fri, Apr 14, 2023, at 10:04 AM, Scott KE8KYP wrote:
I've not been able to make this work.? Is it possible?Hi Scott, I got the original gtk based screen to fit on the DSI screen with another 1920x1080 HDMI-connected monitor.? The one issue I have not yet worked out is limiting the touchscreen input to just the DSI.? The touch screen is not usable in this setup, but the mouse works for both. The gtk screen is being sized in sbitx_gtk.c around line 3411 in the ui_init function.? I commented out the section that starts with? #pragma GCC diagnostic push to and including? #prmgma pop Then added two lines after the now commented code: screen_width = 800 screen_height = 480 This forces the gtk screen to the size of the DSI.? Then I set up the HDMI screen on the left and the DSI screen on the right using the Screen Configuration under Preferences. This worked for me.? If I start Sbitx without the HDMI monitor connected, it functions just like the original code, with the touch screen working correctly.? This points to the touch driver automatically scaling to the full size of the combined displays.? I am still researching how to limit the touch input to the original DSI screen. 73 Evan AC9TU |
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Re: sBitx DE v2 lost audio loopback
Whoa! On Thu, Apr 20, 2023, 1:48 PM Rafael Diniz <rafael@...> wrote: Hi Ashhar, |
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Re: sBitx DE v2 lost audio loopback
Hi Ashhar,
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So, reinstalled from scratch, starting from RaspOS 64-bit Bullseye Lite. Just compiled by hand WiringPI: All the rest via apt-get... I got it working! Everything! So the software runs without problem in 64-bit! I'm not sure why first time did not work, but anyway, made a simple clean install, set the config.txt, snd-aloop and alsa setup - all working! All I installed (many stuff for my use, but anyway... can be useful as reference): ??????? apt-get -y install uucp \ ?? ???????? alsa-tools \ ??????????? alsa-utils \ ??????????? autoconf \ ??????????? bash-completion \ ??????????? bluez-tools \ ??????????? build-essential \ ??????????? curl \ ??????????? emacs-nox \ ??????????? git \ ??????????? htop \ ??????????? iwatch \ ??????????? jq \ ??????????? libtool \ ??????????? libb64-dev \ ??????????? net-tools \ ??????????? patch \ ??????????? pip \ ??????????? python3 \ ??????????? python3-pymysql \ ??????????? rxvt \ ??????????? sudo \ ??????????? vim-nox \ ??????????? wmaker \ ??????????? xterm \ ??????????? zlib1g-dev \ ??????????? liblzma-dev \ ??????????? ffmpeg \ ??????????? libmagic-dev \ ??????????? imagemagick \ ??????????? php-fpm \ ??????????? php-cli \ ??????????? php-curl \ ??????????? php-gd \ ??????????? php-mbstring \ ??????????? php-mysql \ ??????????? php-pear \ ??????????? php-soap \ ??????????? php-sqlite3 \ ??????????? php-xml \ ??????????? php-opcache \ ??????????? composer \ ??????????? mariadb-server \ ??????????? inotify-tools \ ??????????? tigervnc-standalone-server \ ??????????? nginx \ ??????????? nodejs \ ??????????? hostapd \ ??????????? openvpn \ ??????????? dnsmasq \ ??????????? wireless-regdb \ ??????????? wireless-tools \ ??????????? wpasupplicant \ ??????????? dnsmasq \ ??????????? iw \ ??????????? yarn \ ??????????? bc \ ??????????? dkms \ ??????????? python3-gps \ ??????????? python3-tornado \ ??????????? python3-alsaaudio \ ??????????? python3-hamlib \ ??????????? libc6:armhf \ ??????????? libgtk-3-dev \ ??????????? libfftw3-3 \ ??????????? libfftw3-dev \ ??????????? libfftw3-double3 \ ??????????? libfftw3-long3 \ ??????????? libasound2-dev \ ??????????? libncurses-dev \ ??????????? sqlite3 \ ??????????? libsqlite3-dev \ ??????????? ntpstat \ ??????????? ntp Cheers, Rafael On 4/19/23 19:38, Ashhar Farhan wrote:
Very interesting, Rafael, |
HA3HZ
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