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Hi Im still pretty new to the teensy audio world but I am trying to make a 4 track stem mixer with effects and I could use some help. The basic idea is that I would load 4 Stereo wav files of different song stems onto the teensy via sd card. Once...

If USB power is maintained on the Teensy so that the ON/OFF button works - the RTC time is also maintained with or without battery.

Just check the schematic, VBAT is tied (via diodes) to the output of the 3.3V regulator (which is apparently redundant anyway since VDD_HIGH_IN is internally connected to VDD_SNVS_IN).

To quickly show how I tested, I connected the CP2105 cable to a Teensy 4.1. I connected each of its ports to a single-port FTDI USB serial cable. The cable for Teensy 4.1 and the two FTDI cables plugged into this USB hub which connects to my...

I just released v0.35.0. Here's the Changelog: ## [0.35.0] ### Added * Added a ping call to the main program. * Added `qindesign::network::util::steady_clock_ms` and `qindesign::network::util::arm_high_resolution_clock` classes that conform to...

So, this same setup doesn't work for Teensy 4.0. The test : #include <SD.h> #define SD_CS 4 void setup() { Serial.begin(9600); delay(2000); // Wait for the Damn Serial to come alive.. while (!SD.begin(SD_CS)) {...

I will take a look there is probably some around here somewhere. Trying to remember if an Adafruit product used them.

Do you still have a single port CP2105 adapter handy? I don't have one. Any chance I could talk you into running a quick test to make sure I didn't break anything?

Now that arduino-cli is a little more prevalent, is there any way I could convince you to somehow meet in the middle, so that it's at least just a little easier to modify these build parameters? I understand your point in post #2, but I'm...

Oh yes, I'd never used that - I don't know the answer.

Glad you got it working. Figured it might be something like that...

To answer this specific question: No, Claude completely misunderstood how interface claiming works. It tried to add unnecessay code to remember which interfaces had been claimed. But that wasn't the problem at all, and can't even become a...

More power supply decoupling per strip, quite large values are needed, maybe 330uF to several mF, as the base frequencies are in the kHz range. Some strips have access to the power at both ends, try adding decoupling at both ends.

To quickly show how I tested, I connected the CP2105 cable to a Teensy 4.1. I connected each of its ports to a single-port FTDI USB serial cable. The cable for Teensy 4.1 and the two FTDI cables plugged into this USB hub which connects to my...

Or correctly? Can you check with a spectrum analyzer?

I've been using 1.8.19 - I'll try 2.3.8 tomorrow, though I don't expect it to make a difference. You didn't mention which Teensyduino you're using. I'm guessing not 1.60, and my suggested change may well be the cause of the crash - I couldn't...

That's a good point. I should probably ask them and get more details, if they'll tell me.

They often are individually free-running PWM so are already at random phases to each other, although you might need a high speed camera to check this.

Hi Mark. The On/Off input pin, as marked in the diagram. If you connect a push button to this input you can power the teensy down. I need to know whether the RTC will continue to be powered while plugged in (5v supplied to Vin) but in the...

You need to explain your circuit I think, there is not on/off input defined to my knowledge. From the T4 product page:

i used Arduino IDE Version: 2.3.8 Date: 2026-02-25T15:38:21.789Z CLI Version: 1.4.1 I changed the line of code. The compiler make no errors. But the programcode is crashing on my hardware.

Now that arduino-cli is a little more prevalent, is there any way I could convince you to somehow meet in the middle, so that it's at least just a little easier to modify these build parameters? I understand your point in post #2, but I'm...

Thought I'd add a link for how to (sort of) do this with arduino-cli: https://forum.pjrc.com/index.php?threads/how-to-add-extra-build-options-using-arduino-cli.77536/

Sometimes I have to go away and eat, and stuff like that... You're looking at the "master" branch, whereas we're using the "/dev/big-screen-t4" one. So ... did the Arduino sketch start working for you? What version of Teensyduino are you using...

I imported the working Arduino file into PlatformIO with ST7735_t3 Lib and encountered the same error when compiling. I don't know why grrrrr

Thanks. Yes, there's a problem with importing the library. PlatformIO isn't seeming to accept the library from the Arduino Lib folder.

@Rolfdegen: I don't have any displays that use the ST7735_t3 library, but I thought I'd take an independent look. Have you downloaded & installed the latest version (after the update mentioned in post #45) ?? Are you sure that you don't have...

I think I may have started a thread in the wrong category, for which I apologise. I have a working stereo recorder and playback on a T4.1 controlled from an Arduino MEGA using a H50B touch screen and TFT. All OK so far. I need to be able to...

Rereading my request, I realise I was not as clear as I should be. What I want to be able to do is backtrack a recording during playback, not play the audio backwards. For example, if a recorded file is playing at perhaps 40 minutes in, I want...

I need help, please. Where is the error?

Ah. I mean when the teensy is powered down via the On/Off input.

I'm getting an error message with PlatformIO and VS code. Arduino IDE reporting no errors. But PlatformIO is reporting an error in ST7735_t3.h, line 4970. I don't know where the error is.

Which push button? The only button on the Teensy is a program button.

Hallo ??

Now. I have Build error!

To quickly show how I tested, I connected the CP2105 cable to a Teensy 4.1. I connected each of its ports to a single-port FTDI USB serial cable. The cable for Teensy 4.1 and the two FTDI cables plugged into this USB hub which connects to my...

To answer this specific question: No, Claude completely misunderstood how interface claiming works. It tried to add unnecessay code to remember which interfaces had been claimed. But that wasn't the problem at all, and can't even become a...

Sorry about the delay. I meant to work on this 2 weeks ago, but got distracted by another project. I've committed code on github to support CP2105 dual serial...

Assuming that the blue trace is the SPI clock and the red one is data, I see the 0x00 followed by 4 copies of 0x07 clocked out. So this isn't a problem with signal levels. It looks like incorrect data being placed in the SPI transmit buffer...

Well that's very odd. I've tried your code, with pins amended to suit my hardware (just my pins here, for clarity), and it works absolutely fine: #define TFT_DC 9 #define TFT_SCK 13 #define TFT_MISO 12 #define TFT_MOSI 11 #define TFT_CS 29...

Hi all, When the teensy is powered off using the push button input, does the RTC remain powered by the Vin or would you still need to connect VBAT?

My ST7796S Touchdisplay Test. tft.updateScreenAsync() doesn't work. tft.updateScreen() work fine. // ST7796S Test #define TFT_MISO 12 #define TFT_MOSI 11 //a12 #define TFT_SCK 13 //a13 #define TFT_DC 8 #define TFT_CS 10 #define...

i add granular code to above code by mobile google search result. #include <Arduino.h> #include <Audio.h> #include <SD.h> #include <TeensyVariablePlayback.h> #include <SPI.h> #include <Wire.h> AudioPlaySdResmp playSdWav1...

That looks like your code. You can allocate the framebuffer in PSRAM, and pass its address as a parameter to the setFrameBuffer() method. See the ReadMe.md. Yes it does. But no-one can tell what you've done wrong (or if there's a bug) from that...

tft.updateScreenAsync() doesn't work. updateScreen() is work :rolleyes: void redraw_Display(void) { uint16_t color = rand(); tft.fillScreen(color); } void loop() { if (Timer_1 >= 2000) { redraw_Display(); Timer_1 = 0; }...

I found this. FrameBuffer is located in Teensy4.1 Ram2 DMAMEM uint16_t FrameBuffer[320 * 480];

This was going to be my next question I've seen this in commercial hardware (Pioneer DJ) where long traces and/or wires are used between MCUs that communicate over SPI

One thing that is different between your setups are the SPI signal routing and wire lengths. Your signals looks clean, so this may not be your issue, but I am wondering if you are using series dampening resistors (50-100ohm) on the SPI CLK and...

Similar to the betas I've been hosting, I made a version for the latest 1.60 release. See this post (#22), and remove the "-beta6" parts...

Quick followup to this old thread. New testing has been done with Zetta chips which appear to be the same or successor parts to XTX. https://forum.pjrc.com/index.php?threads/smd-flash-with-teensy-4-1-design.77679/page-2 Zetta ZDSD04GLGEAG was...