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  • unicornpower's Avatar
    03-11-2019, 01:00 PM
    Gotcha, thanks! I did actually add pads for smd resistors on the data lines on my PCB. I shall experiment with different resistances (including 0R).
    33 replies | 1525 view(s)
  • unicornpower's Avatar
    03-11-2019, 08:59 AM
    Not strictly connected, but I managed to get the I2C and I2S working between Teensy 3.5 and WM8731. I'm not using any resistors in series on any of the data lines. See image in last post of this thread...
    38 replies | 867 view(s)
  • unicornpower's Avatar
    03-11-2019, 08:58 AM
    Hmm not sure why that image didn't work..
    33 replies | 1525 view(s)
  • unicornpower's Avatar
    03-10-2019, 06:41 PM
    Unable to make any progress with my PCB, I went back to the drawing board (well, vero board), and built my circuit from scratch from the schematic I attached further up this thread. It worked! I2C transactions...
    33 replies | 1525 view(s)
  • unicornpower's Avatar
    03-06-2019, 10:13 AM
    Ah, that makes sense, thanks Theremingenieur! Seems a little wasteful, data-wise, but as long as it's to be expected. In that case though, I'm at a bit of a loss to explain why I don't see any output on the LOUT pin....
    33 replies | 1525 view(s)
  • unicornpower's Avatar
    03-05-2019, 09:30 PM
    I'm using Teensy 3.5, and for me the I2C side seems to be working perfectly. I'm using @blackaddr's BALibrary, and have commented in the error checking on the I2C transaction and every one seems to succeed. I'm using...
    33 replies | 1525 view(s)
  • unicornpower's Avatar
    02-27-2019, 01:30 PM
    Yup, that's definitely on my list of options! Only getting very limited to time to spend on it at the moment though..
    33 replies | 1525 view(s)
  • unicornpower's Avatar
    02-27-2019, 12:58 PM
    I'd be interested to hear how you get on with this, Derek. Were you able to confirm if the I2C setup transaction from Teensy to WM8731 completed successfully? If so you are in the same boat as me. I'll continue...
    33 replies | 1525 view(s)
  • unicornpower's Avatar
    02-23-2019, 06:31 PM
    I tried your BALibary, and 'commented in' the serial output. The I2C appears to be working fine, I get SUCCESS on all Wire transactions. At least the chip is alive and working in some capacity. So it seems it's the I2S...
    33 replies | 1525 view(s)
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wm8731+teensy schematics? 03-11-2019 01:00 PM
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11-07-2015