Re: DCF77 Time Signal #display #t41 #t41-ep

#24228

Bill,

I know, it’s an issue that remains to be seen. Time will tell (pun intended)!

Paul, KI7LW?

Re: DCF77 Time Signal #display #t41 #t41-ep

#24227

开云体育

Great… is it accurate?

?

Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ

?

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

?

Owner – Operator

Villa Grand Piton – J68HZ

Soufriere, St. Lucia W.I.

Rent it:

?

Moderator: North American QRO Group at Groups.IO.

Moderator: Amateur Radio Builders Group at Groups.IO.

?

email:? bill@...

?

Show quoted text

From: [email protected] <[email protected]> On Behalf Of Paul, KI7LW
Sent: Thursday, September 21, 2023 11:16 PM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] DCF77 Time Signal #display #t41 #t41-ep

?

Joerg & Jack,

Just soldered some pins to VBAT and GND on the Teensy, applied 3v, and the RTC is working.

Thanks to everyone,

Paul, KI7LW?

Re: DCF77 Time Signal #display #t41 #t41-ep

#24226

Joerg & Jack,

Just soldered some pins to VBAT and GND on the Teensy, applied 3v, and the RTC is working.

Thanks to everyone,

Paul, KI7LW?

Re: 4SQRP T41 update: Video rotated.

#24225

Jim Pruitt rotated the video and it is a lot easier to watch now:

--
Jack, W8TEE

Re: Alternative to Teensy 4

#24224

It was not an Ethernet chip that was removed; it was the Cortex-M0+ (IMXRT1062), which is used to flash the Cortex-M7 (MIMXRT1062DVJ6B).? My mistake.? I have not used a Teensy for years, but it’s coming back to me ;)

?

If one removes the Cortex-M0+ (IMXRT1062), the only thing that “breaks” is using the Teensy flash application, which is separate from the Arduino IDE, at least on my development platform.? The Arduino IDE will continue to function normally and produce a file that can be used to flash the Cortex-M7 (MIMXRT1062DVJ6B).

?

If one’s skills are up to (successfully) using a JTAG device, one can use the JTAG device to flash the Cortex-M7 (MIMXRT1062DVJ6B) with the file produced by the Arduino IDE.? So, there is no (good) reason to dump the Arduino IDE because some of us want to use JTAG, and anything else, in my humble opinion, would be throwing the baby out with the bathwater.? Further, continuing to use the Arduino IDE will make it easier for folks (new to microcontrollers) to begin to use and experiment with this project.

?

What would be really nice:? if someone(s) would write some JTAG (or some other debug) firmware for the onboard Cortex-M0+ (IMXRT1062).? STM and TI, to name two, have this type of functionality on their evaluation boards.? Well, it’s good to have a dream, I guess ;)

?

Anyway, that’s my $0.02.? Your mileage may vary.

?

Ian

Re: 4SQRP T41 update

#24223

I was unable to see a way to correct the video. To adjust your view, tilt your head to the right. (Sorry...couldn't resist...

)

Jack, W8TEE

On Thursday, September 21, 2023 at 09:37:49 AM EDT, Dan Quigg via groups.io <twowindsbear@...> wrote:

Can you 'edit' the video so it is horizontal rather than vertical?? Or tell me how to adjust my view of the vid?

Thanks & 73

--
Jack, W8TEE

Re: 4SQRP T41 update

#24222

Can you 'edit' the video so it is horizontal rather than vertical?? Or tell me how to adjust my view of the vid?

Thanks & 73

Re: Programmable BenchPowerSupply

#24221

Hi John:

I'm not sure why the touch display doesn't work, as there are thousands of the book sold and this is the first time we're had anyone say the touch screen didn't work. My guess is that the ILI9844 library is not being read. The line

#include <ILI9488.h> ? ? ? ? ? ? ? ?// https://github.com/jaretburkett/ILI9488

gives you the URL for the proper download.

debug2 is used to initialize the EEPROM. It needs the EEPROM to start properly.

When the book was written, PB0 was defined in the core for the TeensyDuino software patch. Changes in the parsing done by the latest IDE enforces some C++ rules that were not enforced before and in the Teensy software patch has changed.

I'm finishing up the T41 project right now, and it should be done in about a month. Remind me to look into this further after that and list any remaining problems at that time. The touch not working has to be a library problem, so check that out first.

Jack, W8TEE

On Thursday, September 21, 2023 at 04:03:52 AM EDT, John <on4ckf@...> wrote:

Jack

Me and my friends built the Programmable BenchPowerSupply , but we

encountered many problems.

1 The touch display does not work.

2 The adjustment of the power supply does not correspond to the book.

3 if debug2 is not used the power supply will not start.

4 Ports are defined multiple times in the program (PB0).

Is the" BenchPowerSupply004_Final_5-27-20 " the latest firmware.

The book mentions a manual, but I can't find it.

John on4ckf

--
Jack, W8TEE

Re: Alternative to Teensy 4

#24220
Edited

I looked at the Debug Mod Project.? ?I believe that the Arduino IDE will no longer be able to work properly, so we'd have to move to Platform I/O, VSCode or eclipse.? Also libraries are added to the project in a different way.? In that way, it becomes more of a tradition embedded project, which I don't mind, but it may be more intimidating for others.

There is something called GDBStub that is supposed to work without hardware modification, but the last time I tried it, I didn't have much luck.

73,
Jack KC7VLO

Re: DCF77 Time Signal #display #t41 #t41-ep

#24219

As Jack wrote earlier: You only need to connect a 3V battery to Vbat of the Teensy and the internal clock will not loose time.?
There is a thread on the SW side in the PJRC forum:

The internal clock will be set by a program upload.
--

73, Joerg - DB2OO

Programmable BenchPowerSupply

#24218

Jack

Me and my friends built the Programmable BenchPowerSupply , but we encountered many problems.

1 The touch display does not work.
2 The adjustment of the power supply does not correspond to the book.
3 if debug2 is not used the power supply will not start.
4 Ports are defined multiple times in the program (PB0).

Is the" BenchPowerSupply004_Final_5-27-20 " the latest firmware.

The book mentions a manual, but I can't find it.

John on4ckf

Re: Alternative to Teensy 4

#24217

Someone made an interesting FPCB to access JTAG for Teensy 4.1:

It looks like it has to be for a Teensy 4.1 without Ethernet.

I'm sure Paul (pjrc) has read the threads that ask for JTAG access or a "development" Teensy with JTAG access.? Maybe, one day.....

Ian?

Re: Alternative to Teensy 4

#24216

JTAG, or any debugger, would be nice, but don't forget this is for others who are not well-versed in either software or hardware development. The Arduino IDE continues to get better and I do think that someday we will have a symbolic debugger, but I don't see fewer pins or less real estate to be real problems. However, that's not to say that someone else can't do it.

Jack, W8TEE

On Wednesday, September 20, 2023 at 06:37:37 PM EDT, jerry-KF6VB <jerry@...> wrote:

On 2023-09-20 15:12, Albert Peter wrote:
> Having worked with most of the Arduino line and several other
> microcontrollers, including the Blue Pill - the Teensy has a whole lot
> going for it,

I was wondering if there would be any point to ditching the Teensy and
just
using its CPU, the IMXRT1062.? Not to save money, but to have less pins,
less
board real estate.? AND to have genuine JTAG debug.? And there are
better IDE's
out there...

? One problem with that, is that the exact CPU in the Teensy is a BGA (
Ball Grid
Array ).? I'm damned good at soldering, but that's where I draw the
line.

? ? ? ? ? ? ? ? ? ? ? ? ? - Jerry, KF6VB

--
Jack, W8TEE

Re: DCF77 Time Signal #display #t41 #t41-ep

#24215

开云体育

This seems to be what everyone is using… plus the boards are only about $1 eBay…? Recommended by Arduino.cc

?

Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ

?

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

?

Owner – Operator

Villa Grand Piton – J68HZ

Soufriere, St. Lucia W.I.

Rent it:

?

Moderator: North American QRO Group at Groups.IO.

Moderator: Amateur Radio Builders Group at Groups.IO.

?

email:? bill@...

?

Show quoted text

From: [email protected] <[email protected]> On Behalf Of jjpurdum via groups.io
Sent: Wednesday, September 20, 2023 8:19 AM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] DCF77 Time Signal #display #t41 #t41-ep

?

Harry:

?

I think a good number of people will opt for a RTC. Are the issues such that I might help?

?

Jack, W8TEE

?

On Wednesday, September 20, 2023 at 06:49:19 AM EDT, Harry Brash <harry.brash@...> wrote:

?

Jack and Paul

I have a modified version of the direct frequency entry software which allows you to set time and date.? I tried it out on a couple of? 'volunteers' and they identified a few issues which I've not had time to sort out yet.

Would that be helpful assuming I can sort out the issues they raised?

Harry GM3RVL

--
Jack, W8TEE

Re: Alternative to Teensy 4

#24214

On 2023-09-20 15:12, Albert Peter wrote:
Having worked with most of the Arduino line and several other
microcontrollers, including the Blue Pill - the Teensy has a whole lot
going for it,I was wondering if there would be any point to ditching the Teensy and just
using its CPU, the IMXRT1062.  Not to save money, but to have less pins, less
board real estate.  AND to have genuine JTAG debug.  And there are better IDE's
out there...

  One problem with that, is that the exact CPU in the Teensy is a BGA ( Ball Grid
Array ).  I'm damned good at soldering, but that's where I draw the line.

                         - Jerry, KF6VB

Re: T41 Alternative VFO arrangement but will it work?

#24213

开云体育

How will you keep the two clocks synchronized?

?

Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ

?

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

?

Owner – Operator

Villa Grand Piton – J68HZ

Soufriere, St. Lucia W.I.

Rent it:

?

Moderator: North American QRO Group at Groups.IO.

Moderator: Amateur Radio Builders Group at Groups.IO.

?

email:? bill@...

?

Show quoted text

From: [email protected] <[email protected]> On Behalf Of Harry Brash
Sent: Wednesday, September 20, 2023 5:39 AM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] T41 Alternative VFO arrangement but will it work?

?

Hi Greg
I've just about finished the RX board and the wiring from the main board with the 2 clocks.? Be interesting to see how the RX works with the divide by 2.
I Googled QEX.? It is an ARRL publication.? I must try to find the article you mentioned.? I'd be interested to know how it dealt with keeping a fixed relationship between the two div by 2s.
Harry? GM3RVL

Re: Alternative to Teensy 4

#24212

Having worked with most of the Arduino line and several other microcontrollers, including the Blue Pill - the Teensy has a whole lot going for it, especially
for demanding applications like SDR. Some of the Blue pill brothers have the raw power, but the question is do they have the wide library support that Teensy has? There is also the question of a suitable higher res screen. You need at least the 800x480 pix to show what the T41 has. On the grand scale of things, you would not be saving much if you do want performance. - Note that even RASPI is much more expensive that Teensy 4,1.

A primary requirement of the T41 Sw is support for the ARM DSP library. Other micros do support it, but that is a basic need. Doing a port of T41 SW to the STM32 family would be a pretty large task, IMHO.

Just my 2 cents worth.
Al
AC8GY

4SQRP T41 update

#24211

All:

I'm still plugging away on writing the assembly manual and building the T41 kit from 4SQRP. I was able to get the receiver done today and was listening to CW on 15M today and took a few seconds of video. It shows the T41's ALP decoder in action. This is at about 34WPM. The interesting thing to note, however, is how an adjacent signal (perhaps 100 Hz away) does not affect the decoder. You can see the video here:

--
Jack, W8TEE

Re: DCF77 Time Signal #display #t41 #t41-ep

#24210

Thanks Jack

No,I think they were small changes.? It's a while ago.? I'll check and get back to you.

I remember being quite surprised what good time it kept.

Harry? GM3RVL

Re: T41 Alternative VFO arrangement but will it work?

#24209

The system described in the article uses an Si5340D, which can provide "complementary clocks" (180 degree) from a single programmed output.
That sounds exactly what you are proposing to do with the Si5351.? I have both the online and hard copy of the article.? I can send you the hardcopy
when I return home next week.? It's a very interesting article.

--
73 Greg KF5N