MQS output from SD card

[taltsutamatu]

I'm trying play WAV file from SD card. I connect SD to SPI2 (CS pin 36). There are 2 dinamics on 10 and 12 pins (left and right channels). But working left channel only.

[Frank B]

I guess you confused left and right?
10 is the right channel.
12 does not work, because it is MISO from SPI

As far I know there is no way to fix that - other than just not to use SPI. The T4 has a by far better port, where you connected CS. Connect the sd-socket there (with all pins)

[taltsutamatu]

Channel 12 is working (MISO from SPI). Don't work channel 10 (CS from SPI).

[taltsutamatu]

In sketch I defined CS pin 36

[Frank B]

Please post the connections in more detail - are you using a Teensy 4.0 ? Or 4.1? To which pins is the SD Slot connected? Post all connected pins.
Also, which Teensyduino-version?

[taltsutamatu]

Teensy 4.0
Teensyduino v1.54

CS - pin 36
MISO - pin 34
MOSI - pin 35
SCK - pin 37
These pins connected to SD card.

I using audio amplifier "arduino module amplifier PAM8403 mini 5V 2x3W". It connected to 10 and 12 pins.
There is sound from pin 12. Pin 10 don't work, no sound.

[Frank B]

Sorry, I have no Idea how can hear any sound anywhere, and I don't know how the SD libary automagically uses SPI2. Perhaps I'm not up to date regarding the new SD Library. From my understanding nothing should work.
For SDIO you need _all_pins on the backside (4-bit parallel transfer), but you don't use it anyway, because you use CS=36.

So, I hope some else can answer your question.

You have pinMode(10,OUTPUT); (!<-- remove that!) , too - this stops any mqs on pin 10 - but it does not matter, because the program should stop before that...and print the error message. So, it's over my head.

@Others: Does the SD Library automatically use SPI2 ??

[taltsutamatu]

photos: https://dropmefiles.com/hwRFm

[taltsutamatu]

Yes, automagically and 12 pin working, music from SD card playing in speaker.

[taltsutamatu]

pinMode(10,OUTPUT) I've tried to delete. Did not helped

[Frank B]

Okay.. seems the new lib is smart ..

But I don't know why MQSR does not work after removing pinMode. It should.

[Frank B]

Your file is stereo? :-)
Edit, ah yes, you're using the examples.

[Frank B]

Try to output a sine or any ther signal (nothing from SD), perhaps...

[taltsutamatu]

well, actually, I've added pinMode trying to solve problem with sound So problem was before I added this.

[taltsutamatu]

okay, I'm trying

[taltsutamatu]

Try to output a sine or any ther signal (nothing from SD), perhaps...

It works. So problem in using SD or incorrect using gui

[Frank B]

It works. So problem in using SD or incorrect using gui

Interesting!

Looks like a bug in the SD lib. I'll take a closer look this evening. Perhaps it accesses pin 10 - but shouldn't

[taltsutamatu]

thx There is a video: https://youtu.be/WEkGye7nsIc

[taltsutamatu]

Try to output a sine or any ther signal (nothing from SD), perhaps...

Speaker on pin 10 stops working after SD card initialization (SD.begin(SDCARD_CS_PIN))

[Frank B]

Yup... but i could not find the exact problem so far.. Please post that in the current 1.55 beta thread. It really seems to be a bug, that needs to be fixed.

[taltsutamatu]

1.55 version of what?

[Frank B]

https://forum.pjrc.com/threads/67989...no-1-55-Beta-1

[taltsutamatu]

thank you a lot