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Assuming the coolant tmp returned by the CAN bus can be < 60deg or > 120deg but you want the stepper only to move between 60deg and 120deg and that the temp reading is linear.

I took the liberty...

Thanks for the tip. Works like a charm.

I never thought about the need for "a couple of hundreds" of connections.

I totally agree!
Please post your findings, I'll be glad to help testing.

There is no need to modify connect() in Audiostream if you do the following:

Instantiate all possible AudioConnections needed in the project(in the global scope, as usual). Multiple sources to one...

You need to explicitly set the text background color. If not, printing text will behave as you described(transparent background).



tft.setTextColor(ILI9341_WHITE); //white text with transparent...

Pretty sure the Rev D schematic is wrong. Pin 7 & 8 should be swapped.

The SPI pin definitions in effect_delay_ext.cpp don't matter when using a T4 since it has no alternate pins for SPI. Thus the pin numbers are hard coded as seen in the T4 portion of SPI.cpp.

...

I did not try your code but if you want to use the print statement to send floats you need to be aware that by default it will only send 2 digits after the decimal point.
If you want more decimal...

Because the SPI0 clock signal (SCK) for the T40 is on pin13 and for the T36 it is on pin14. And that signal is needed to access the external memory chip.

@DD4WH, you're welcome. Glad those pictures helped you push your limits.

Physical contact does not mean electrical contact. There might be some glue residue from the paper tape at the extremities of the resistor legs.

@rusty113
I could be wrong but looking at your first picture it seems your didn't solder the wires to the resistors. If so, how do you expect it to work?

oops, misunderstood the question.

correction:

// Button Toggle In Code

#include <Bounce.h>

const int channel = 1;
bool toggleState = false;

What about this?

// Button Toggle In Code

#include <Bounce.h>

const int channel = 1;

Bounce button0 = Bounce(0, 10);

@DD4WH
Antratek has revD audio shields in stock. They ship from the Netherlands if I'm not mistaken.
https://www.antratek.com/teensy4-audio-board

Apparently there is an incompatibility between SdFat version 2.0.0beta5 and the Audio lib which itself uses the SD lib.(Arduino 10.8.10 Teensyduino 1.48)
Following simplified example does not...

I just successfully ran the SdCardTest sketch on the sd adapter of a rev.C audioshield connected to a T4.0 with the modified spi pin definitions.

Did you check the connections of pins 10, 11, 12,...

The spi pin definitions in above code are for T3.x and audioshield revC.
see: https://www.pjrc.com/store/teensy3_audio.html
Try this


#define SDCARD_CS_PIN 10
#define SDCARD_MOSI_PIN 11...

Correction:
Sample rate for T4.0 = 44100Hz
Sample rate for T3.x = 44117.64706Hz

Just figured this out while having a look at AudioStream.h

First you have to declare a pointer to the object you want in your struct and then you need to instantiate that object.
Members of the objects inside the struct can then be accessed with ->

Here...

According to the datasheet for the Sharp sensor,
typical supply current is 33mA
max supply current is 50mA

Assuming you only want to power 8 sensors and 1 T3.2 then
total supply current = 8 x...

And in this case it is easy to extend the structure to contain velocity, midi channel and even different threshold values for every sensor.

struct Sensor{
const uint8_t pin; //analog sensor...

Here is a way to loop the code, it compiles but did not test.

int thresh;

struct Sensor{
const uint8_t pin; //analog sensor pin nr
uint8_t note; //sensor midi note
bool noteIsOn;...

At the bottom of this page,
https://www.pjrc.com/teensy/td_libs_AudioNewObjects.html

Have a look at the IntervalTimer lib.
https://www.pjrc.com/teensy/td_timing_IntervalTimer.html

If I'm not mistaken, TimerOne and TimerThree are for avr microcontrollers.

Just a wild guess since I never used the AudioPlayQueue object.

Sample rate mismatch between input(50000Hz) and output(44117.64706Hz)?

The outputQueue is filled faster than it is played. When...

Pin 9 is used by the audio shield for the BLCK signal. Try another pin not used by the audioshield like 16 or so.
see: https://www.pjrc.com/store/teensy3_audio.html

@acbc
According to the tutorial you picked the wrong object in the Design Tool.
wavetable instead of waveform.

Please post your complete code, otherwise it rather hard to help without guessing.

guess: you might have declared your oscillator with a different name than "waveform1".

Except that the mantissa is unsigned, see data type T5 in the manual.

float thevalue(uint16_t highword, uint16_t lowword){
int8_t expo = highword>>8;
uint32_t mant =...

Could not replicate the problem with your code on a teensy4 with the sgtl5000 audioshield.

What happens if you add this to your setup()?
filter1.frequency(500);
filter1.octaveControl(1);

...

No problem, good you found the solution yourself.

Funny enough, your solution would have worked only if there was something like an unsigned float type in C.

correction: bits # 23...00 Binary Unsigned value (24 bit)

Thanks for clearing up...

This is one way to do it:

//example for phase modulation

#include <Audio.h>

// GUItool: begin automatically generated code
// AudioSynthWaveform waveform[0]; //xy=277,194
//...

Yes

Hmm, the first line doesn't make sense. word1 should be 64768.

Maybe some kind of obfuscation?

Just for the sake of correctness.
There is no such thing as a 16bit byte. A byte is 8bits. We are talking about words which are 2 bytes long.

If you calculate the 2's complement of word1 and...

paragraph 9.1.5


I don't want to sound rude but the answers to all those questions can be found in the datasheet linked in the third post by luni.

Anyways, I dug up the schematic and some...

No ground wire needed. Just 2 wires.

All RS485 nodes are wired in parallel. As for the wire, I used ordinary hook up wire.

Yes, you basically run the 2 wires from node to node.

Both...

There is only one way to know, read the datasheet of the battery you want to use.
It will probably tell you that 4.2V is fine.
Also don't forget to check if the minimum current the charger can...

Did a something similar a long time ago and implemented a half-duplex RS-485 network with a max487 transceiver for every microcontroller.
The total length of the chain was about 30-40 meters

It's all part of the learning process.
Count yourself lucky, I already destroyed 2 teensy4's on the same project and i still haven't a clue why or how.

Checked your samples, there is nothing wrong with them. But you already knew that since your problem persist with the use of AudioSynthSimpleDrum.

It's kind of hard to troubleshoot you problem...

Just soldered a fresh T4 to a new microSD adapter just to be sure I didn't make a stupid mistake in my previous posts, and I did not.
Tested and confirmed to work with SD lib v1.2.2 & SdFat lib...

@defragster
Thanks.

@sid8580
Yes, CardInfo.ino was compiled using SD lib v1.2.2.

Just installed Bill Greiman's SdFat library (version 2.0.0-beta.5) and ran his SdInfo sketch.

SdFat...

@sid8580
How do I check which version of SD lib i'm using? CardInfo.ino was compiled with Arduino1.8.10 & TD1.48.

Initializing SD card...Wiring is correct and a card is present.

Card type:...

According to your first & third picture, your wiring looks ok.
I used the examples->SD->CardInfo.ino sketch to test the SD card's functionality.
You will need to change
const int chipSelect = 4;...

This is how I wired a SD to uSD adapter to the Teensy4 SDIO pins.
As you can see it is not 1 to 1.
17988

I would suggest to also put the pin numbers on the top silk layer for those who want to use a double row header as seen on the first picture you posted.

17638

There is no reference to a CS pin in your linSlave code.
In order for the slave to be able to transmit, you need to make the CS pin high to put the transceiver in Operation Mode(enable the...

Do you have a pullup resistor on pin1 of the lin transceiver?
According to the MCP2004 datasheet, pin1 RXD is a open drain output and therefore needs a pullup resistor.