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  • widdly's Avatar
    Today, 01:31 AM
    widdly replied to a thread CS42448 TDM problem in Audio Projects
    I often find the error lies between the chair and the keyboard.
    5 replies | 95 view(s)
  • widdly's Avatar
    Today, 01:23 AM
    There is no configuration file. The __IMXRT1062__ is passed to the compilier when the code gets built using the -D option Paul mentioned. See here... https://www.rapidtables.com/code/linux/gcc/gcc-d.html
    6 replies | 74 view(s)
  • widdly's Avatar
    03-28-2020, 05:57 AM
    No worries. I pushed some commits for this and to add slave support for i2s oct input.
    11 replies | 121 view(s)
  • widdly's Avatar
    03-28-2020, 05:33 AM
    The control objects just set codec configuration via i2c or maybe spi. The input_xxx and output_xxx stuff has the actual i2s configuration. In input_i2s.cpp ... CORE_PIN13_CONFIG = PORT_PCR_MUX(4); // pin 13,...
    6 replies | 74 view(s)
  • widdly's Avatar
    03-27-2020, 03:59 AM
    I've got it working for teensy 3.6 I was looking at the slave stuff in output_i2s2.cpp instead of output_i2s.cpp. The frame-sync-early and inverted-frame-sync bits in the SAI registers give the correct left...
    11 replies | 121 view(s)
  • widdly's Avatar
    03-26-2020, 10:47 PM
    I would be very interested in the details. How did you get usb audio on the T4? I didn't think that was implemented.
    14 replies | 383 view(s)
  • widdly's Avatar
    03-26-2020, 02:27 AM
    I've got the data out of the teensy on my scope and I can see that disabling frame sync early is not working. The samples are starting a bit after the FS transistion. Looking at the data from the roland, the samples...
    11 replies | 121 view(s)
  • widdly's Avatar
    03-26-2020, 02:24 AM
    Read on... page 12 describes a PLL mode that generates it based on LRclk and BCLK.
    11 replies | 121 view(s)
  • widdly's Avatar
    03-26-2020, 01:33 AM
    Yep you are correct. I put them on a scope and the FS is at 44.1k, BCLK at 64 * 44.1 and the MCLK is 384 * 44.1 When I tested with my PCM5102 I didn't need the MCLK
    11 replies | 121 view(s)
  • widdly's Avatar
    03-26-2020, 12:53 AM
    When I connected the roland device to the PCM5102 dac I set it to Left Justified mode. There is a timing diagram for that on page 14. It would appear that the LRClck is also inverted in that mode. I think there are...
    11 replies | 121 view(s)
  • widdly's Avatar
    03-26-2020, 12:37 AM
    I don't have much documentation. I have a service manual that has a schematic for the device Roland made to connect to the header I'm using. The header and schematic is on pg 59. I've figured out the details based...
    11 replies | 121 view(s)
  • widdly's Avatar
    03-26-2020, 12:00 AM
    Hi, I have a Roland MV8800 sampler. It has an expansion header that provides four "i2s" output streams (8 channels) and an input stream (2 channels). Additionally it has a ttl level midi in and out. I'd like to...
    11 replies | 121 view(s)
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