WMXZ
Senior Member

AFAICS, usb_mtp_status is only introduced in latest beta. At least, on my production system TD 1.56 it is not there

Not sure if the RAWHID_* and DEVICE_ * are needed and what they are doing they com from USB_EVERYTHING they are used in part for USB_SERIAL_HID (DEVICE_*) USB_RAW_HID (RAWHID_*) but USB_MIDI4,16...

One issue with MTP+Serial is that it uses for the moment the PID of Everything Even if MTP+Serual is not yet ready to be included for full, I continue to suggest that Paul defines a dedicated PID, so we can run the...

About 3 years ago, I made a FAT free FS called ZeroFS https://github.com/WMXZ-EU/zeroFS Not that I suggest you to use this, but it may be easier to digest what I did than analysing FatFs In general you only have to...

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From T4.1 card, I see SCK,MOSI,MISO SCK1,MOSI1,MISO1 SCK2,MOSI2,MISO2 You should be able to use any set for talking to uSD cards HOWEVER, you must then adapt the SD card interface accordingly. There may be also...

For SPI, you always should check that CLK,MOSI,MISO and chip select of your board correspond to your program. The Teensy card may help to figure out the standard values.

Thanks Bill, I tried with new disk and it worked also here. sane configuration (SdFat 2.1.2, Teensyduino 1.56 with Arduino 1.8.19) must have screwed up my earlier testing.

Just downloaded actual version and without further editing of SdConfig.h and activating build-in debug messages, I get test exFAT logger sd.begin() done file FILE_A.txt, pos=8192, adding 8192 bytes, written 8192...

@sicco You can easily switch on the internal debug information of SdFat by uncommenting setting #define USE_DBG_MACROS 2 in ...\hardware\teensy\avr\libraries\SdFat\src\common\DebugMacros.h It gives you a...

OK, as the teensy loader can do more than simply loading, so it is significant IP of PJRC.

No, but there are different versions of *cli.exe, that you can use to experiment

I remover the two files and restarted program test exFAT logger sd.begin() done file FILE_A.txt, pos=8192, adding 8192 bytes, written 8192 file FILE_B.txt, pos=8192, adding 8192 bytes, written 8192 file FILE_A.txt,...

I tried the example it fails here with FFFFFFFF EB3A9 DBG_FAIL: ExFatPartition.cpp.195 DBG_FAIL: ExFatFileWrite.cpp.108 DBG_FAIL: ExFatFileWrite.cpp.663 file FILE_A.txt, pos=65536, adding 8192 bytes, written 0 ...

I could not resist to adapt to Teensy 4.0 with AudioCard /** * @brief Circular Buffer definitions * */ #define NBUF_ACQ 70 #if defined(ARDUINO_TEENSY41) #define MAXBUF (10*512) ...

Suggest to inspect main.cpp in both ....\hardware\teensy\avr\cores\teensy(3/4) which does what joepasquariello described

It would be important that you also provide a copy of the compiler output (including errors and warnings)

Here is the version that writes directly to csv files /** * @brief Circular Buffer definitions * */ #define NBUF_ACQ 70 #define MAXBUF (10*512) EXTMEM char data_buffer;

this way you may need a more complex program: - acquire data and control vehicle. - convert data. of course, you can download two different programs, 1 for acquisition and one for converting. but then you could run...

Yes that is the idea, you want size to be a multiple of 10 and a multiple of 512 (128 *4) If you have the possibility, I would take the disk out from teensy ad plug into PC. Alternatively you could use MTP to...

As a proof of concept I compiled the following /** * @brief Circular Buffer definitions * */ #define NBUF_ACQ 10 #define MAXBUF 1280 EXTMEM uint32_t data_buffer;

IMO, you should redesign your approach to use interrupts even if that happens 2000 times per second. this way you can do your 150 us processing at interrupt level, accumulate your data at a write queue and safely...

On a T4.1 with 16MB ERAM buffer and 33 MHz SPI clock, you can easily record 2.75 MB/s continuously to microSD (about 75% SPI duty circle) From time to time some buffer will be needed and used when microSD card is...

I have my T4.1 also behind a bulkhead and can easily program it.

Not on T4.0 (yes on T3.x and T4.1) on T4.0 the two pads are for USB2 and not USB1 that is used to download programs.

I have not tried it recently, but if you set the baud rate of the comport of the teensy in question to 134 baud, then Teensy should go into program mode. Idea is that loader detects first teensy in program mode to...

I would simply try it out. OK, one needs a signal generation, but this could be a another teensy with audio out :-)

b'cause 2V equiv to 0 dB as you can see from Table and which may depend on other settings of the SGTL5000

from figure 2 of https://www.nxp.com/docs/en/data-sheet/SGTL5000.pdf you see that line-in goes to a 0 to 22.5 dB amplifier so I would say, if you select SG = 0 for the sgtl5000 then you attenuate your line-in by...

All connections are labelled. there is no need to connect equal labels with lines. AFAIK, this is the preferred style.

I only refer to the schematics SNAP(2) is using. Depending on your application a SGTL5000 my not be suitable without additional amplification. Additional 20 dB may be useful for very quiet scenarios. I suggest to...

Yes, I'm sure, I have a SNAP myself.

The SNAP2 connects hydrophone to line-in of SGTL-5000 BTW, if you wanted to build your own SNAP2 compatible recorder, simply use a Teensy with Audioboard, you only miss the display Edit: Hint: In order to see...

https://github.com/WMXZ-EU/USB2 It is for T3.6 and could be used as starting point for T4.1

@vindar There is nothing magic about Linear Algebra, so I would not expect that CMSIS library is significant faster than own code. In most cases compiler is smart enough. If you have not done yet, have a look into the...

@DM5SG not sure, it is a good idea to have destination buffer smaller than source buffer. It is not obvious from example code that transfer count is being determinate by last buffer call (here ...