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Type: Posts; User: Sandro

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    A bad mistake I did here... i had connected the...

    A bad mistake I did here... i had connected the flash chip GND pin to Analog GND... shame on me.



    Anyway, now the small PCB is done; i'm testing it, seems working fine.
    18688
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    Good, thank you Neurofun. I'm designing a small...

    Good, thank you Neurofun. I'm designing a small pcb for the W25Q256, with a groudplane, to be soldered toghether with the Audio shield (on top, or below) ... let's see how it will perform.
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    Going back to W25Q256.. I read on Audio shield...

    Going back to W25Q256..

    I read on Audio shield schematics (where an 8-pin flash memory IC is contemplated), that "RST" is indicated. While on 8pin ICs (like W25Q128) /RESET and /HOLD use the same...
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    I got it...Ok, thank you Frank for the explantion!

    I got it...Ok, thank you Frank for the explantion!
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    For completeness: after formatting, using normal...

    For completeness: after formatting, using normal speed playback, the report shows more or less same values and same behave:

    0 218
    1 7
    2 217
    3 7
    4 2143
    5 7
    6 217
    7 7
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    Hi Paul, thank you for your answer; I started...

    Hi Paul, thank you for your answer; I started adding some lines in order to get min, max and average times, and the result was so strange (for me!), that I decided to see each value; this is my code,...
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    Hi Michael, I made some tests with micro SD...

    Hi Michael,
    I made some tests with micro SD built on Teensy 3.6, clock 180 MHz; I played with play_SD_raw, modifying the lenght of the data array read from SD, as follows.

    The "core" part of...
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    The attached pic was this: 18396 In these day...

    The attached pic was this:
    18396

    In these day I went on with my tests... and this assembly showed some limit: with intense use of the chip some errors appares. I guess if a small PCB with its...
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    Sorry, here: #else ...

    Sorry, here:


    #else
    Serial.println("failed!");
    AudioStartUsingSPI();
    #endif


    Serial.println("failed!") is a refuse.
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    Hi Michael, I had not notice that! So.. thank...

    Hi Michael,
    I had not notice that!

    So.. thank you for your detailed analysis: at the moment I would remain on Teensy 3.6, or maybe switch to T4.0 in a next release; and for all the topics you...
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    But... I found this post: ...

    But... I found this post:

    https://forum.pjrc.com/threads/55662-Polyphonic-playSdRaw?highlight=playSDraw

    It says that for polyphonic application (mine uses 8 voices at least) it's raccomanded...
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    Good suggestion! I had not considered this! ...

    Good suggestion! I had not considered this!



    For my application, the midi expander:
    https://forum.pjrc.com/threads/57897-queued-Lilla

    100M for file system is more than enough!! :o
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    This is so important to me! I didn't know this...

    This is so important to me! I didn't know this fact of quad SPI... Maybe it means that reading data rate from micro SD card on Teensy is comparable/faster than from flash memory soldered on Audio...
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    Hi Michael, thank you for your answer; I didn't...

    Hi Michael, thank you for your answer; I didn't get if you are talking about W25Q256 32M 16-pin chip or about the W25Q128 16M 8-pin chip (which is not my case); I'm using SerialFlash in my code....
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    Using W25Q256 on Audio shield

    Hi all, I'm experimenting a W25Q256FV 16-pin SOIC 300-mil on Audio shield Rev B (on teensy 3.6, clock 240MHz), in order to store audio files to be played. Actually I have connected the flash chip...
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