WMXZ
Senior Member

Anyhow, this is a question to TeensyThread (ftrias) maybe you cannot have TeensyTread AND loop together? I would first try another thread that only does delay(1000);

The error is in the code you do not show

I though granularity is 16?

It's already included in latest Teensyduino (1.54-beta7) (don't worry about beta)

Good, Do you have a particular application, microphone, sensor? If you are using a Windows PC you may try to use VisualCode to open directory.

Normally I would say: - download code - edit config.h to reflect your adc situation open microSoundRecorder.ino with Arduino IDE and compile (Verify) Don't get worried about include files. They are only including...

You will be surprised, how much you can do with a lower CPU speed.

Did changing the CPU clock change anything on RF interference?

It seems that the example was using a very transient implementation of SdFat as indicated by SdioCardEX card; maybe you try first the SDFormatter examples provided with SdFat library. or ask the person that...

would it be easy to colour code histogram legend?

@defragster, he said not sure if the wipe+reload test is already implemented last summer?

Did pressing the program mode button help? Is there another connection to Teensy running as zombie and locking USB port?

I did some correction and updated https://github.com/WMXZ-EU/MTP_t4/ For @KurtE et al that have WIP forks, this is the new code void MTPStorage_SD::removeFile(uint32_t store, char *file) { char tname; File...

@sw_hunt I hooked up a T3.6 and run mtp_test, deleted test1.txt using MTP, removed uSD and checked on PC. File is still there. I will investigate.

Does the same operation work on T4? (Have not used T3.6 for a while) what exactly do you mean by copy: PC to T3.6, T3.6 to PC, T3.6 to T3.6 same directory level, different directory level? file size? what are...

For the record, uSDFS is ELM-CHaN's FatFs file system that together with MSC from @wwatson can be used with USBHost.

Let's ignore that DFT formula is y_k = Σ 0,...,N-1 (x_n * e^-i2πkn/N ) i.e. no left-hand side sum FFT is called Fast because it does not implement this formula, which has O(N^2) complex multiplies and add...

@mala96, As far as I can see you did not ask any question in this thread but your post is full of insults, so I urge superusers to take note.

agree completely. Fun with Teensy is as it is now All compiled from source code with full control of features

On castellation. I understand while it could useful, but it would not be useful in presence of bottom mounted components, as done on T4.1. Also inboard pin soldering would not be possible. On the other side, if there...

IMHO, If it is not there it should not be used! the fact that Arduino/Makefiles are not adapting to changing gcc is not the problem of gcc maybe there is an equivalent library, or installation of toolchain is not...

Another way to look into this is For a 1Hz resolution you need an analysis window of 1 second or so and the signal must be stable for all this time. If the signal is only 0.1 s long, then the spectrum will be at...

While I have no idea what RT101X/RT102X is, I would be very surprised if PJRC licenses the bootloader chip code, which, however, is not a question to the forum. All what I wanted to say is that, at least according to...

a side question in arm_dcache* functions we find asm volatile("": : :"memory"); asm("dsb"); if I take disable_irq() we have #define __disable_irq() __asm__ volatile("CPSID i":::"memory"); how should we read...

or something like this? in cmsis_gcc.h \brief Enable IRQ Interrupts \details Enables IRQ interrupts by clearing the I-bit in the CPSR. Can only be executed in Privileged modes. */...

You do not need RTOS for IPC.

But USA definitions of week are different (not only when week starts)

IMHO, using the audio datapath is better than RawHID, if you can live with the predefined sampling rate. IIRC, with RawHID you have up to 64 byte/ms. Obviously, with some low-level programming data rates can be...

the reply #2 still holds. the best way to transfer two queues to the is to use USB-Output and connect it to the two queues. This will take the data and transfer to PC. what you do with data on PC is your business. ...

You can easily avoid Arduino pre-processing but continue to use Arduino IDE Put all your code into a local .cpp file (main.cpp is fine, but can be anything.cpp) and let the sketch.ino file empty. Arduino Pre-processor...

Please give the exact code to reproduce this observation.

"Aliasing" the signal does indeed work (sampling a 40 kHz signal with 38kHz), but you still have to make sure that no unwanted signal passes through. In this case you must make sure that no signal is between 0 and 19...

Kurt, Frank, thanks for answer. Yes, in my DMA isr I'm using the arm_cache functions. I was only confused by the psram_memtest program that uses arm_dcache functions between write and read. Anyhow, my program...

Question now is, is 1.7s freeze related with use of PSRAM or with doubling (or 'wrong'/huge size) in startup.c ? IOW, do all freeze code use PSRAM? Is access to PSRAM cached?, does this cache then be cleared as with...

out of curiosity, what is FlexSPI2 used for? only psram? Yes, I use EXTMEM in my code.

what is the required data rate?

It therefore seems that the overrun counter is 2^28. i.e. freeze is 2^28 IPG cycles

Yes, I have a arm_dcache_flush_delete in my DMA ISR

Serial.begin does not do anything (I even do not use one) USB_serial is always used if usb_type is set to Serial. you could test using Seremu to see if it is the Serial implementation that freezes. if you do write to...

I2S port also works. done that years ago with a 1 MHz ADS SAR chip. However, as it needs good AA filter, I dropped it.

I try since yesterday to generate stand-alone freeze example, but no success. All too deterministic. Unfortunately my freeze application, which does not freeze anymore (fortunately) uses as HW custom ADC (custom...

as indicated on adafruit web page use only 3.3V and no level shifters as 5V will kill T4.1

In may case it happens middle in the program

while I completely understand German, would you please add a link to the schematic you are referencing to? Edit: OK, I'm Bavarian

Yes, that is correct, even micros() gives the correct answer (i.e. consistent with freeze duration)

To be completely honest, I had always issues with USB after T3.2 times. In my freeze case I thought it maybe PC, so I run program from battery, disconnecting PC but wrote log to uSD. 1.7s freeze continued to occur....

Good summary

however this seems a permanent freeze, while OP is a temporary freeze (1.7 s). Let's not diverge discussion. we need to know the origin of the CPU clock dependent freeze of 2^30 CPU cycles (1.7s at 600 MHz), even if...

As it was asked, I was compiling with -O2 and is now -Os and my yield was void yield(void) {} but is now void yield(void) { // USB Serail - Add hack to minimize impact... if (yield_active_check_flags &...

I'm not necessarily pointing to to issue, but I do not understand do { __LDREXW(&systick_safe_read); smc = systick_millis_count; scc = systick_cycle_count; } while ( __STREXW(1, &systick_safe_read)); So,...

It is odd indeed, but IMHO, we use Teensy core and not all features are discovered.

I should add, I'm using micros() with an ISR

No, I did use TimeLib, but I removed it (reading RTC directly and not via CPU timer, which could be an issue)

If I take my application where I count I2S-DMA interrupts (that are also easily visible on LED). Typically there are 750 interrupts/s and LED is flashing. when freeze occurred, LED remains off, interrupt counts drops...

while my system did not freeze (hold for 1786 ms) in last two days, I'm still convinced that: it is either something on CPU level (generating interrupts) then we cannot do anything about it or it has something to do...

I'm fighting a similar issue on T4.1, same freeze, happening randomly about 1.8 s for 600 MHz clock but 2.8 at a MCU clock of 396 MHz. Freeze was observed with I2S-DMA that runs at elevated priority. visual symptoms...

can you not create a new thread?

As I'm one of the people Paul is most likely referring to. What you see on a scope is broadband noise. However, if you look to a spectrogram you can see tonal that are not easily seen on broad band time series. Sure,...

You may look into https://github.com/WMXZ-EU/test_sgtl5000 above 240 kHz there is some degradation

Easiest is to add at top of file "#include "Arduino.h" " because that what Arduino precompiler does also.

Seems to work. At least Teensy talks to PC using flying wires and can download (the main reason for functionality)

No, I have a very tight space (not large enough for a USB connector) so USB data dots are connected to a PCB connector that is connected to a Underwater Bulkhead etc. All in a water tight pressure housing. An...

I used one of these extenders, Bill is talking about, to try sdio-access to multiple microSD. while the extenders worked fine, my attempts to have multiple SD cards on the sdio bus failed. only one card was responding...

make the math: 8MB in 50 ms is 160 MB/s or 1.28GBit/s.

No. See the schematic. If you plug in USB and can measure 5V on Vin, the bridge is NOT cut. inspect with magnifying glass.

@mborgerson the endpoint definition are somewhat modelled after the other devices. Anyhow, T3 and T4 have different USB implementations therefore there will be different descriptors. There was some years ago a...

what type of errors? did you follow the instructions on the readme file? what USB-type did you choose?

If you stick with microSD cards (as I do it) the actual MTP_t4 https://github.com/WMXZ-EU/MTP_t4 is a reasonable solution. Obviously feel free to follow the MTP responder thread or wait until Paul includes MTP to...

Please note that there is no garbage collection on Teensy, so malloc/free combo may create problems in the long run.

I'm using SDFat as supplied via Teensyduino, which has in ExFatConfig.h as default "#define USE_EXFAT_UNICODE_NAMES 0 " It works for me and I'm sorry for non-latin charactersets. However, if someone develops the code...

Increase AudioMemory. 2 is too few. try different values. if thy start with 50 you can use AudioMemoryUsageMax() to learn what is the minimum value you have to set (defined in cores: AudioStream.h) Also, push at least...

I have a T4.1 with a custom daughter board (having 6 spi uSD cards) : total 7 disks Originally I wanted to use only sdio bus, but unfortunately the uSD cards to not implement the sdio addressing system (similar to i2c)...

SW was developed for T3.6. porting to T4.1 is possible but requires some low level adjustments (as indicated by the compile errors you indicated)

No, also as my application calls in general for all slots populated with SD cards. However, could add the test on Data3 to void sdfs.begin to tell me that it failed.

Did you restart Arduino before recompiling to clean-up cache?

I wanted to share an observation T4.1 with Win10 I typically have 6 SD cards attached to my T4.1 (with sdio) observation: MTP may fail to work (shows only sdio, with no files in it), when I populate only a part of...

Reason is, that index list assumes that for N storages, the first N indices indicate the N root devices and have itself as parent. So if storage is added at a later time, a reset is required. Assuming this is working, a...

the symbol is defined in cores/teensy(3/4)/FS.h can you check its existence, or if you have a second FS.h on your system? maybe in "SD-Juse_Use_SfFat"?

It will be hard to get ALL spectral values printed in REAL TIME to serial terminal. To start I would only printout 1 to 10 spectra per second and throw the others away.

You cannot program Teensy via USB host pins. To use USB host pins as USB device (e.e. for Seria, MIDI etc) you have to write your own USB device SW for USB2 (the one accessible via USB host pins) To use access...

and use SD.begin(BUILTIN_SDCARD);

IMHO, you will never get a realistic performance picture without a solid soldered setup (best is pcb or veroboard) Then measurements should be made in a tin-box to shield electric fields that couple into wires. A...

As I said before, I did not know that they are NOR and not NAND. (mea culpa, mea culpa, mea massima culpa) Feel free to change them to NOR