Forum Rule: Always post complete source code & details to reproduce any issue!

Search:

Type: Posts; User: Theremingenieur

Page 1 of 10 1 2 3 4

Search: Search took 0.03 seconds.

  1. If I read correctly page 2068 of the reference...

    If I read correctly page 2068 of the reference manual, the MQS is an add-on block to the SAI-3 and the latter requires naturally an I2S configuration to serve the MQS.
  2. Replies
    1
    Views
    58

    It’s two built-in ADCs inside that mixed signal...

    It’s two built-in ADCs inside that mixed signal MCU. No extra chip. More info in the ADC chapter of the iMRXT1060 reference manual which you can find either on the NXP or PJRC websites.
  3. What I read in different threads is that the USB...

    What I read in different threads is that the USB serial of the Teensy is so quick that it can flood the Arduino Serial Monitor in a way that everything stalls... So, I‘d less worry about the Teensy‘s...
  4. Replies
    38
    Views
    849

    I found the cause for my non- or...

    I found the cause for my non- or mis-understanding. The reference manual does mention that SAI1 is multi channel capable but the documentation afterwards does not give any detail beyond the 1 single...
  5. Replies
    38
    Views
    849

    Thank you, Paul! I'll have obviously to dive...

    Thank you, Paul! I'll have obviously to dive deeper into the reference manual this weekend. 2 data pins on one I2S for quad channel audio output will be sufficient for my project. Inputs are not...
  6. Replies
    38
    Views
    849

    I'd also allow a question to continue thinking...

    I'd also allow a question to continue thinking (my current project does NOT use the audio library, working with 24bit audio @96kHz) before my T4 will arrive: On the T3.x there was 1 single I2S with 2...
  7. Replies
    4,110
    Views
    416,406

    Although I’m 55 years old and wearing progressive...

    Although I’m 55 years old and wearing progressive glasses, I’d give hand soldering a try. IMHO 1mm pitch can easily be hand soldered, if needed with a x2.5 magnifier lens which roughly “lifts” the...
  8. Replies
    4,110
    Views
    416,406

    Congratulations! A huge Thank You to Paul, the...

    Congratulations!

    A huge Thank You to Paul, the PJRC crew, and the beta testers/contributors!

    Unfortunately, I was (and I am still) "under water" with lots of other things going on and could...
  9. Replies
    33
    Views
    2,610

    Blocking of an IP address follows a violation of...

    Blocking of an IP address follows a violation of the forum rules, in 99% of cases spamming. In case of repeated spamming from IP addresses belonging to the same provider, all IPs of that provider...
  10. Sorry to say that, but to solve the main problem...

    Sorry to say that, but to solve the main problem (different channel amplification), you don't need a "usine à gaz". Go to the accessibility settings of the iPhone, scroll down to the hearing section...
  11. @Frank B: It looks to like most of the I2S...

    @Frank B: It looks to like most of the I2S fractional clock dividing in the audio lib is done based on F_CPU/F_PLL. Selecting F_BUS as the clock source and adapting the fractional divider defines in...
  12. The best guide for such things are 5 years of EE...

    The best guide for such things are 5 years of EE studies at a good technical university...
  13. The newer versions of the audio library do...

    The newer versions of the audio library do 32bit/slot which is 64bit/frame, but only in the 2ch version. The 4ch version is still doing 16bit/slot or 32bit/frame and waits for a kind and competent...
  14. USB serial is native in the Teensy, there is no...

    USB serial is native in the Teensy, there is no FTDI as on some old asthmatic Arduinos. So this is normally the more efficient way to go, at least when exchanging data with a PC.

    Reducing the 24V...
  15. Why not, for all the bells and whistles (LEDs,...

    Why not, for all the bells and whistles (LEDs, switches and potentiometers) go for a semi autonomous touch screen like the Nextion HMI?
  16. Replies
    62
    Views
    6,474

    The flash security byte is intended to prevent...

    The flash security byte is intended to prevent reading out the flash via JTAG, but as I said above, establishing a JTAG connection is not possible without additional microscopic soldering on the...
  17. Replies
    62
    Views
    6,474

    In any case

    In any case
  18. Replies
    2
    Views
    75

    Do people nowadays not longer study data sheets?...

    Do people nowadays not longer study data sheets? :)
    https://www.pjrc.com/teensy/KL26P64M48SF5.pdf

    Page 26 states clearly that the minimum for stable operation is 1.13V
  19. Replies
    62
    Views
    6,474

    No, the flash can't be read out via USB. One...

    No, the flash can't be read out via USB. One would need to fiddle with some small contacts on the PCB.
  20. Replies
    62
    Views
    6,474

    For making sure that USB flashing will work, you...

    For making sure that USB flashing will work, you should minimize the reset delay. If not, you’ll run in similar issues as with the capacitor.
  21. Replies
    62
    Views
    6,474

    The file name is mk20dx128.c

    The file name is mk20dx128.c
  22. Replies
    62
    Views
    6,474

    I wasn't aware of the 803/809/810 series. That...

    I wasn't aware of the 803/809/810 series. That looks like something useful in your case. But you'd have to decide once forever if you go for 5V or 3.3V. They seem to be available in smd only...
    ...
  23. Replies
    62
    Views
    6,474

    You are contradicting yourself. On one side, you...

    You are contradicting yourself. On one side, you use bulky through-hole components, on the other side you talk of wearables, where SMD components are much more suitable. So, I see the failure rather...
  24. Replies
    62
    Views
    6,474

    A Voltage reference, a comparator, 3 resistors......

    A Voltage reference, a comparator, 3 resistors...

    or something like this: https://www.onsemi.com/pub/Collateral/NCV8508B-D.PDF
  25. Following the Kinetis application note, the...

    Following the Kinetis application note, the source impedance should be relatively low for precise ADC readings. That’s why I’d suggest making the voltage divider 5k/10k instead of 10k/20k. And yes,...
  26. Replies
    62
    Views
    6,474

    The Teensy loader is obviously not willing to...

    The Teensy loader is obviously not willing to wait for the reset to come up delayed. That’s why I said that a capacitor was not always the best solution...
  27. Use GND. Your signal looks already filtered...

    Use GND. Your signal looks already filtered enough.
  28. But yes, you can. It's not about "workaround and...

    But yes, you can. It's not about "workaround and jumpers", it's about engineering, which means processing and outputting a signal on the Teensy LC and feeding it into the appropriate pins of the prop...
  29. Don‘t waste your time, trash it and take the next...

    Don‘t waste your time, trash it and take the next one out of the drawer. After smoking, the chip will never again be 100% reliable and other issues might show up, soon. At today‘s hourly IT wages, a...
  30. Replies
    62
    Views
    6,474

    The famous reset delay capacitor might in some...

    The famous reset delay capacitor might in some cases fix boot problems which are due to the 3.3V line coming up too slowly. But the fixed delay applied by the capacitor might not be optimal in all...
  31. I confirm that without firmware (hex file) which...

    I confirm that without firmware (hex file) which would enable the USB hardware, a blank MK20 (be it blank because of an empty MKL02 or for any other reason) will not show up as a device in the device...
  32. PWM is always synchronized inside an FTM, so you...

    PWM is always synchronized inside an FTM, so you should in a first step swap pins to use up to 8 channels from the same FTM. An update of all output signals happens always after the main counter...
  33. The MK20 starts always (if it starts) from an...

    The MK20 starts always (if it starts) from an internal RC oscillator. The boot code will then enable the XTAL oscillator, the FLL/PLL, and the clock distribution module. So, yes, without a hex file...
  34. I get the impression that you, JSON, are speaking...

    I get the impression that you, JSON, are speaking a different language than we who try to help you.
    You started a thread about SPI. Then, you are saying that you want establish communication with a...
  35. In that case, you answered your question already...

    In that case, you answered your question already yourself: Yes, the CS pin has to be tied to GND to make the slave side basically work. As long as it is high (reverse logic), the SPI hardware of the...
  36. The CS pin should never be tied constantly to...

    The CS pin should never be tied constantly to either high or low. The SPI specification states clearly that the SPI master has to assert it (tie low) before a transaction begins and to de-assert it...
  37. Without looking at the library’s source code, I’d...

    Without looking at the library’s source code, I’d guess that the interrupt is fired not on the absolute level on the cs pin, but on a transition from high to low, i.e. when the master de-asserts the...
  38. Replies
    34
    Views
    1,186

    Just my two cents: A new Teensy 3.6 costs 30$....

    Just my two cents: A new Teensy 3.6 costs 30$. Your working hour costs, let’s assume and include all secondary costs, 100$. I’m sure that you and all the helpful people here in the forum have spent...
  39. Replies
    3
    Views
    118

    You are welcome! :)

    You are welcome! :)
  40. Replies
    3
    Views
    118

    I guess that you won't see anything when you...

    I guess that you won't see anything when you connect your oscilloscope to the TX1 pin...

    Your code instantiates the wrong serial port. Serial is the virtual serial over USB. The hardware UART on...
  41. How do you expect getting help if you do not give...

    How do you expect getting help if you do not give more precise information about WHAT is not working... is it that myFunc() is not called, or is it called but no reply sent? What about the wiring?...
  42. If I happened to roast a Teensy accidentally, I...

    If I happened to roast a Teensy accidentally, I even wouldn’t post that here. No need to advertise my silliness in public since whatever happened, it was my fault. The correct procedure is trashing...
  43. Think of the many mice, rats, apes, and pigs...

    Think of the many mice, rats, apes, and pigs which are killed during the development of new médicaments or perfumes...

    And think of what you will earn when you’ll have sold the first 5000 units of...
  44. The Teensy SPI library website...

    The Teensy SPI library website https://www.pjrc.com/teensy/td_libs_SPI.html states clearly that slave mode is not supported...
  45. ISR(Vector) works only on AVR but not on ARM...

    ISR(Vector) works only on AVR but not on ARM processors like the Teensy. The SPI library for the Teensy does AFAIK not support attachinterrupt().
  46. I'm not a "savvy mcu/electronics professional", I...

    I'm not a "savvy mcu/electronics professional", I have "only" acquired degrees in mathematics and music more than 30 years ago. But when it comes to developing stuff with an MCU, the approach is the...
  47. An internal pull-up on PTC10/11 can only come...

    An internal pull-up on PTC10/11 can only come either by the GPIO engine or by the I2C engine. Both should normally not play a role as long as these pins are neither configured as GPIO nor as I2C...
  48. If you want to do analog readings, you should not...

    If you want to do analog readings, you should not configure the pins as GPIO input pins to prevent ugly side effects from the pin mux into the ADCs. After booting, pins are by default in analog mode...
  49. Replies
    23
    Views
    642

    The strategy is: 1 Setting the FTM1 clock source...

    The strategy is:
    1 Setting the FTM1 clock source to F_BUS
    2 Setting the FTM1 MOD register to 59 (60-1) because the 0 counts, will give 1MHz clock
    3 Setting the FTM1_CH0 CMP register to 29 or 30...
  50. Replies
    23
    Views
    642

    2 issues: First, there are visible "ringing"...

    2 issues: First, there are visible "ringing" peaks, your oscilloscope probe might not be well compensated and thus the measurement slightly wronged. Second, with using analoigWriteFrequency and...
Results 1 to 50 of 500
Page 1 of 10 1 2 3 4