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Jack, thanks again for the help. Actually I already removed and reinstalled the IDE and everything else. I had a problem like this before and doing that fixed it, but not this time. Maybe I should delete everything and start with a clean slate. Good luck on the book. Did you need any updated drawings?

Robert:

I wouldn't do it yet, but over the years I've had to reinstall everything from the IDE to the TeensyDuino to all the libraries. After doing that, it worked. I have no clue why...it just did. I've worked 40 of the last 48 hours on Al's edits to the book, plus adding my own. This will be the last update for the book. If I work a few more hours tonight, I should have only 3 chapters to go, which I'll hopefully finish tomorrow night. Then I'll get back to finishing my T41 and can start testing it again. I'll keep you posted.

Jack, W8TEE

On Sunday, March 16, 2025 at 08:10:19 PM EDT, Robert Luken W3RDL via groups.io <now.w3rdl@...> wrote:

Jack, thanks for the help. I'm still trying to figure out what has changed. All of the SDT Versions were working until I changed the position of the Temp display and compiled. There was a popup message about some libraries had updates and I made the mistake of clicking ok. Every version freezes now. The only exception is Ver50.2 when compiled with Faster and not Faster with LTO.? I reinstalled the IDE and all of the libraries, but they were probably the latest versions, so if it's a new library version, I have no idea which one.

I did some more tests

Ver50.2 :
compiled with Faster with LTO, 528MHz, Dual serial - freezes
Memory Usage on Teensy 4.1:
? FLASH: code:263052, data:132604, headers:8820?? free for files:7721988
?? RAM1: variables:214848, code:245384, padding:16760?? free for local variables:47296
?? RAM2: variables:487008? free for malloc/new:37280

compiled with Faster, 528MHz, Dual serial - freezes
Memory Usage on Teensy 4.1:
? FLASH: code:271308, data:136116, headers:8316?? free for files:7710724
?? RAM1: variables:221024, code:240792, padding:21352?? free for local variables:41120
?? RAM2: variables:422208? free for malloc/new:102080

compiled with Faster, 600MHz, Dual serial - runs, did freq cal
Memory Usage on Teensy 4.1:
? FLASH: code:271308, data:136116, headers:8316?? free for files:7710724
?? RAM1: variables:221024, code:240792, padding:21352?? free for local variables:41120
?? RAM2: variables:422208? free for malloc/new:102080

compiled with Faster with LTO, 600MHz, Dual serial - runs, did freq cal
Memory Usage on Teensy 4.1:
? FLASH: code:263052, data:132604, headers:8820?? free for files:7721988
?? RAM1: variables:214848, code:245384, padding:16760?? free for local variables:47296
?? RAM2: variables:487008? free for malloc/new:37280
"C:\\Users\\w3rdl\\AppData\\Local\\Arduino15\\package

Version 66.1:
compiled with Faster with LTO, 600 MHz,? serial
Memory Usage on Teensy 4.1:
? FLASH: code:306044, data:131296, headers:9116?? free for files:7680008
?? RAM1: variables:193152, code:282312, padding:12600?? free for local variables:36224
?? RAM2: variables:471424? free for malloc/new:52864

It appears that system runs at 600MHz and freezes at 528MHz.

On 3/16/2025 2:21 PM, jjpurdum via groups.io wrote:

The stack space is probably large enough here not to be a problem. The other version make me uncertain. My system is still in parts as Al and I are finishing up the last update for the book. I'm still a week away from a working system..

Jack, W8TEE

On Sunday, March 16, 2025 at 11:15:46 AM EDT, Robert Luken W3RDL via groups.io <now.w3rdl@...> wrote:

Jack, I recompiled SDTVer066.1_2-24_25 (Arduino IDE 2.3.4) unmodified(original config.h) with:

Smallest Code with LTO

528MHz

Serial

Statistics:

Memory Usage on Teensy 4.1:
? FLASH: code:208488, data:128216, headers:8380?? free for files:7781380
?? RAM1: variables:189568, code:197768, padding:31608?? free for local variables:105344
?? RAM2: variables:471456? free for malloc/new:52832

Compiled with Smallest code

Memory Usage on Teensy 4.1:
? FLASH: code:235292, data:164296, headers:8980?? free for files:7717896
?? RAM1: variables:244864, code:216568, padding:12808?? free for local variables:50048
?? RAM2: variables:406624? free for malloc/new:117664

The header in the .ino file says it should be:

Memory Usage on Teensy 4.1:

? FLASH: code:228876, data:161312, headers:9164 ? free for files:7727112

? ?RAM1: variables:219584, code:210408, padding:18968 ? free for local variables:75328

? ?RAM2: variables:409920 ?free for malloc/new:114368

Both freeze after the Setup Complete message.

I don't know what this means, but if I run from a cold start(CPU Temp ~ 30C, it runs for about 15 secs, Temp 32.5C.

The hotter it is the shorter the run time.

Running with the Ver50.x, it stabilizes ~41C and runs fine.

All of the Ver66.x releases have run before with Faster with LTO and I was able to go through the Freq and Receive IQ cal.

Also between Ver 50.x and 66.x the Tx and Rx LEDs are swapped.

On 3/16/2025 9:48 AM, jjpurdum via groups.io wrote:

What happens if you compile with the smallest code option? In the compile statistics, what values do you see

Memory Usage on Teensy 4.1:
? FLASH: code:10228, data:3016, headers:8256?? free for files:8104964
?? RAM1: variables:3808, code:7664, padding:25104?? free for local variables:487712
?? RAM2: variables:12416? free for malloc/new:511872

(These data are for the ASCII table example program.)

Jack, W8TEE

On Saturday, March 15, 2025 at 10:28:04 PM EDT, Robert Luken W3RDL via groups.io <now.w3rdl@...> wrote:

I removed the Arduino IDE 2.3.4 and reinstalled it along with Teensyduino and the libraries. I compiled SDTVer50.2 and it loaded and ran. Everything worked. Thought problem was fixed so I compiled and loaded SDT Ver66.7. It froze at random points every time I restarted it. I went back to the SDTVer50.2 and recompiled and it froze this time. What's going on? Then I realized that the first time I compiled the SDTVer50.2 I had forgotten to change the compile options to those suggested (Faster with LTO, 528 MHz and Serial). It was set for Faster and 600MHz. I compiled again with the Faster and 600MHz and it ran fine.

I tried compiling SDTVer66.1 with Faster and 600MHz. Compile failed with an out of memory message. Tried SDTVer66.1 with Faster with LTO and 528MHz. Compiles but freezes. It ran prior to this, hardware wasn't changed, so I don't know what it takes to run the Ver66 code. Is Arduino IDE 2.3.4 what others are using?
73 to you!

73

Bob W3RDL

Virus-free.

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Jack, W8TEE

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73
Bob W3rdl

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Jack, W8TEE

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73

Bob W3RDL

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Jack, W8TEE