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Type: Posts; User: zachtos

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    SD card Latency test tool

    Is there any testing tool out there that can determine latency for multi-file playback?

    There are lots of tools that test sustained speed (class 4-10), but we only care if it is able to play...
  2. Sandisk alternative for multi-file playback?

    Has anyone found a cheaper SD card brand than Sandisk that has great multi-file latency?
    IE, play back multiple sounds at once, I hear squeeks/pops when using anything other than Sandisk brand SD...
  3. Thanks, I will try some of those techniques to...

    Thanks, I will try some of those techniques to determine if card lost connection, but if it is a momentary bump, then does anyone have an example of a way to re-start the SD card connection using any...
  4. code to restart SD card if lost mechanical contact temporarily?

    I'm having problems where some of our custom designs are losing contact sometimes with the SD card socket, and then audio stops working, but the application keeps running... Cycle power and...
  5. Yeah, you're right, I think there is an echo...

    Yeah, you're right, I think there is an echo function on the radio, and it is copying what I send out to the TX pin in addition to the wireless transmit.
  6. Does Serial1.print("xyz") cause Serial1.available() to be true?

    I am having strange bug, when I write with Serial1 or Serial2, it seems to echo back to the Serial1 or Serial2.available()...
    Example:

    Serial1.println("xyz");
    if (Serial1.available()) //should...
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    I found a strange bug where my parallel strands...

    I found a strange bug where my parallel strands of neopixel / ws2812b LED no longer work properly. A few of the LED have trouble changing color, so some kind of data corruption? It worked fine...
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    what is Add IntervalTimer update() ?

    what is Add IntervalTimer update() ?
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    Works perfectly! Thanks. I figured it was...

    Works perfectly!

    Thanks.

    I figured it was something not configured correctly in the library, didn't really see a place in the documentation on how to wire up stereo vs mono.
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    Play MONO through both channels possible?

    I have a circuit for sgtl5000 audio codec but have 2 amplifiers on left and right output. I can only get sound on one channel when using mono source file. Can I get it to play on both at same time?...
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    I would love to use MK64FX512VMD12 , but I never...

    I would love to use MK64FX512VMD12 , but I never can find any of those in stock either. AVNET, MOUSER, DIGIKEY only seem to keep a few hundred in USA if they are in stock, and are $8 per 1000qty,...
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    I'm dealing with this issue now, is there...

    I'm dealing with this issue now, is there anywhere in the world this is still in stock?

    I think we need to move to our own inventory so we don't have this issue in future...
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    Thanks for your support, I would be interested if...

    Thanks for your support, I would be interested if such an option came to fruition, similar to uTasker but better.
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    Thanks, I will try that test tool in the next...

    Thanks, I will try that test tool in the next week.

    Per device is not really appealing to business owners. I could not make that work with our owner myself. He basically said, well if we ever...
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    I am now getting word that 10% of our chips in...

    I am now getting word that 10% of our chips in the same bin 1N36B work correctly, and the other 90% do not. I wonder why some will program but not launch the applications, but others will? It is so...
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    Thanks, yes the code was just the blink example. ...

    Thanks, yes the code was just the blink example. I compiled with USB serial, and the code would not run. If I disabled USB, it would run. If I swapped to another bin chip on the PCB, it would run...
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    1N36B teensy 3.1 non working with USB

    I have a product we have been making for a few years now that we developed with Teensy. Has been working great, but now we somehow got an old batch of chips. This old batch of chips seems to only...
  18. I am having trouble with sharing the Low power...

    I am having trouble with sharing the Low power labs RFM69 radio. I have tried adding SPI transactions to the library manually with no success. I believe it's something to do with both devices using...
  19. I tried in the header file of the library ...

    I tried in the header file of the library

    inline bool
    //canShow(void) { return (micros() - endTime) >= 50L; }
    canShow(void) { return (micros() - endTime) >= 300L; }

    300us seems to...
  20. I got a sample and can confirm that the LED no...

    I got a sample and can confirm that the LED no longer works with the adafruit library. The first LED will light up but not correct color, and other colors thereafter will do nothing. I assume there...
  21. My oversea engineering team states that the LEDs...

    My oversea engineering team states that the LEDs are acting strange, so I may have to wait until my sample arrives in the USA in a few weeks to verify on the scope. I used google translate on the...
  22. WS2812B v2.1 release from manufacturer not working

    Hello, we produced a small product using teensy and neopixels for development, and now we buy the addressable LED direct from factory. The manufacturer has updated their chip, 9844WS2812B (neopixel)...
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    I had to delete the 'Libraries' folder from my...

    I had to delete the 'Libraries' folder from my existing sketch folder. After this seems OK.
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    Unable to compile with v1.69 and beta3...

    Unable to compile with v1.69 and beta3 teensyduino on teensy 3.1/3.2
    Missing 'maintainer' from library in C:\Sketches\libraries\SD
    Multiple libraries were found for "SD.h"
    Used:...
  25. Or it looks like in K20 signal multiplexing...

    Or it looks like in K20 signal multiplexing sheet, that I am restricted to those pins for RTS/CTS, but the audio library maybe able to remap some of the pins like maybe SCK and LRCLK ? If so should...
  26. 7367 Serial1.attachCts(pin) Supported only on...

    7367

    Serial1.attachCts(pin)
    Supported only on Teensy 3.0, 3.1, 3.2.
    Serial1 supports pins pins 18 & 20.
    Serial2 supports pin 23.
    Serial3 supports pin 14.

    So far I only see Serial1 having...
  27. Serial.attachCts() can this Pin be re-mapped?

    For attachCts I see that in Teensy 3.X these are restricted pins. They directly interfere with the audio library that I am using. Can these be moved in software easily?
  28. How to share SPI with the Audio optimized SD library ???

    Can I share the SPI (serial peripheral interface) with the Audio library while audio is playing back?

    I am currently using all 3 UART ports, I2C and I2S audio from the Audio library for RAW file...
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    Hmm, we can't get it to work, where does it place...

    Hmm, we can't get it to work, where does it place the INF file so I can use that as a driver?
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    Oh, is there a stand alone serial driver that...

    Oh, is there a stand alone serial driver that happens to work for windows XP?
  31. Thanks, code is very long/complex replicate...

    Thanks, code is very long/complex replicate without hardware, was looking for suggestions. I think we solved it and Paul was right, the radio needed some work on the receiving side.
  32. teensy 3.1 random line breaks in serial data output

    String test "Sending one line of text"; //sample
    test += "\r\n"; //add a carriage return and newline

    Serial2.print(test); //send this every 100ms or so, many other interrupts and SD card audio...
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    Well, I think I have determined that there is...

    Well, I think I have determined that there is something fishy with multiple interval timers operating on Teensy LC at the same time. I think the timings are not correct or some kind of odd bug. ...
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    Teensy LC interval timer limitations?

    Hello, I am having trouble with interval timers in Teensy LC. Code works great in Teensy 3.1, but in LC, I have two interval timers running at same time. They seem to have issues with volatile...
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    Teensy LC EEPROM location

    Hello, I'm using a custom bootloader on the teensyLC that uses mass storage device loading of firmware, but still uses teensyduino IDE and chipset. Do you know where in the flash memory the emulated...
  36. Thread: Audio Library

    by zachtos
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    Just wondering if you had a chance to look into...

    Just wondering if you had a chance to look into this? We have this bug happen at least once a day on our product.
  37. Thread: Audio Library

    by zachtos
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    474,504

    sd_T3 LIBRARY /* Why reinvent the SD library...

    sd_T3 LIBRARY
    /* Why reinvent the SD library wheel...
    * 1: Allow reading files from within interrupts
    * 2: Cache more than one sector for improved performance
    * 3: General optimization...
  38. Thanks, I had '\' instead of '/'. Simple enough.

    Thanks, I had '\' instead of '/'. Simple enough.
  39. Audio library play back from NON root directory?

    Can teensy 3.1 audio library playback audio files from a subdirectory instead of the root directory on SD card?

    I can not find anything saying it is possible. Or even if I hardcode a change to...
  40. Excellent, this is exactly what I need. I will...

    Excellent, this is exactly what I need. I will work and see if I can get a modified version of the uTaskerSerialLoader project running in VisualBasic10. I will post if I get it working, and update...
  41. Is there a way to just combine the SD card loader...

    Is there a way to just combine the SD card loader and SD card USB_MSD capability into one program?

    Then just upload firmware updates via SD card loader instead of teensy loader?

    I want to...
  42. I'm looking to create something very similar to...

    I'm looking to create something very similar to this with uTasker.

    1. Program microcontroller in bootloader mode, either with USB-MSD (using now), or with SD CARD
    2. Able to access SD card to...
  43. That is good news that it would not take a lot of...

    That is good news that it would not take a lot of flash space. At this point in time we are willing to hire someone to design the interface software if possible, and share with Teensy of course.
  44. SPI SD card show up as USB disk = possible? (teensy 3.1)

    Has anyone heard of a bootloader or program that would allow the user to show an SPI connected microSD card to show up as a USB disk in Windows on Teensy 3.1?

    Goal would be to drag and drop files...
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    I think he said open.next is not support right now

    I think he said open.next is not support right now
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    So far audio bug is eliminated !!! :D No more...

    So far audio bug is eliminated !!! :D

    No more pops, squeeks or missed audio sound playback when in multi sound playback mode (RAW format).

    Did test a 1gb FAT32 card, did not work, but 4gB...
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    Soooo Happy right now, working great, must share...

    Soooo Happy right now, working great, must share with team.
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    Any updates on this? We are willing to make...

    Any updates on this? We are willing to make donations to keep wheels of progress spinning...
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    Any updates on the sd card fix patch installer?

    Any updates on the sd card fix patch installer?
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    OK, well I tried installing clean w/o luck. I...

    OK, well I tried installing clean w/o luck. I put the updated audio library, core and SD library into Teensyduino 1.20 and Arduino 1.06 (last version that works for me with multi-sound playback). ...
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