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I'm already using the ethernet port on the PI5

Hi all, I am looking for a solution to connect a Teensy 4.1 to a Raspberry PI5. I have used all the hardware UART on the Teensy 4.1. I would prefer not to use the USB connection on the Teensy because I want to use that to connect to the PC. I am looking at SPI but what would be much more...

I've slowed the scan down and going to try adding caps and 4.7k pullups. Hopefully that will help, I based my scan library on the keypad library.

Hi All, I have an 8 x 8 button matrix that works fine when a single button is pressed. It also works fine when about 15 buttons are pressed and held. However after that amount, it starts to become unstable and I get button triggers from adjacent rows on the same column. I have a diode on every...

Hi all. I have the following code but i don't know how to implement it. I want to assign all these pins as follows: < IOMUXC_SW_PAD_CTL_PAD_GPIO_AD_B1_04 |= IOMUXC_PAD_SPEED(1) | IOMUXC_PAD_DSE(7) | IOMUXC_PAD_SRE(0); IOMUXC_SW_PAD_CTL_PAD_GPIO_AD_B1_05 |= IOMUXC_PAD_SPEED(1) |...

Hi Chris and Tom, would you mind explaining in a bit more detail the syntax so that I can change the slew rate and drive strength on specific output pins and please point me to the information i need in the manual ie where the PAD gpio addresses are in the manual? Thanks in advance Damo

Hi Paul, Is it possible to change the descriptor of each port seperately?

Hi all, I'm using an MCP23017 port expander than connects to the teensy 4.1 using O2C bus. I want to emulate SPI by bitbaging code and clock and sending to the MCP23017 pins. I'd like to use a custom wire library in some way, if possible. Anyone able to give me a head start? TIA

Wow. Thanks!. Is it possible to change the name of each port separately?

lol. I just meant I hope its not too complicated. I'm used to modifying library files but cant seem to find the one that relates to the midi ports. TIA

Is it possible to limit the usb midi ports to only 2 instead of 4 when choosing Midi x 4? Can the library be modified simply? TIA

HI all, I'm having an issue/need help coding sys ex messages. I am able to send sys ex without an issue. I need help to read and analyse sys ex messages being received. If a sys ex message is received and then I attempt to send a message, teensy restarts (crash). But I want to sort out the...

Hi all, I want to integrate a teensy 4.1 into my project. I want to be able to solder the board direct to another pcb but I'm a bit stuck on how to get the usb connection to the pcb without using the usb connector. Any ideas? Should i try to use castelated holes on the underside? not sure. Any...

Thanks. I'll check it out

Thanks Paul. Is there some kind of debug feature for the MIDI in so i can see what's being received ?

How do I turn off MIDI Thru? I'm using usbMIDI. Thanks

Correction: not solved. I'm using this library: AsyncHTTPRequest_Teensy41 Apparently its coded to only print out successful responses. Due to the way Digest Access Authentication works, the first response back is always a 401 - Unauthorized. Is there anyone that can help me modify this library...

Its all good. I found the issue. It was a crappy MD5 library I was using. When i changed the library the encoding worked. Was a tough job. Cheers

Hi All, I'm trying to build a web client that processes Digest Access Authentication. I am close and have been able to duplicate the example as shown in RFC 2617. I am struggling to make it work correctly with the device I am trying to connect to. I think it might be the MD5 library I am...

Hi all. I have a strange issue I am unsure how to resolve. I have a custom UDP broadcast transmission and reception that works fine when the Teensy 4.1 is connected via USB. I am able to see the UDP broadcast reception and teensy response via the serial monitor and everything works fine...

Hi all, I need help designing an 8 x 8 12volt matrix. It will be driving 64 optoisolators. The optoisolators need 12v and 20mA. I've got a MAX7219 that I was going to use to drive transistors but i want to know if I can somehow use a matrix rather than use 64 transistors. Any help greatly...

Hi all. I have 3 brand new teensy 4.1 boards that are not responding to external usb connections. Is there any way to test the board to see if its fried? Damo

Hi all, I have a project where I am using the teensy 4.1 to act as a bridge between ethernet data and usb data. I am struggling to find the cause of data corruption in the data path. I have a file that I can successfully transfer from pc to an FTDI device via usb. No corruption I then send...

Thankyou Sir. It was that easy. Its all working fine although I had an issue with sending the '@' character. I had to force it by using value 64 as it would not send it from the serial window. Thanks again

I've just managed to run SerialTest,ino and I got the following info after I enabled debug: USB Host Testing - Serial USB2 PLL running reset waited 6 USBHS_ASYNCLISTADDR = 0 USBHS_PERIODICLISTBASE = 20004000 periodictable = 20004000 port change: 10001803 connect begin reset port change...

I discovered the chip is FTDI FT2232H This is all the info I have: Device Descriptor: bcdUSB: 0x0200 bDeviceClass: 0x00 bDeviceSubClass: 0x00 bDeviceProtocol: 0x00 bMaxPacketSize0: 0x08 (8) idVendor: 0x0403 (Future Technology Devices International...

all your assumptions were correct thanks for that starting point. I'll also contact ftdi and see if they can assist. cheers

It shows up as USB serial, but to make it work properly I nave to install the specific driver so.. not sure what to do

That's the part I need assistance with Damo

Hi Everyone, I'm looking for some assistance. I have a 3rd party audio module here from Danville Audio and it interfaces with the PC via USB. It has a FTDI chip onboard and I have the drivers for it. It appears as a com port on the PC. Everything in that regard works fine. What I am trying...

This is all the code that deals with it. #include <Encoder.h> #define ENCODER_OPTIMIZE_INTERRUPTS //Pins for rotary encoder (must be interrupt enabled int enc_pin1 = 16; // 3 on connector CN11 int enc_pin2 = 17; // 4 on connector CN11 // Encoder Variables int Enc; //...

its ok i did it.. please delete thread

I need to print the value of the volume(level) function as it is changed by a pot which is the headphone volume, out to a serial but I need to map it to 1 - 10 with .5 step increments.. Currently its a float that goes from 0 - 1 Any idea how to code this?

lol sorry guys.. Here's the specifics. I have 1 audio shield. I"m currently using it as an ADC.. into pin 8 of the teensy. Out of pin 7 of the teensy is going into another I2S device.. works fine. Now what i'd like to do is send that same data from pin 7, back into pin (7?) of the...

Is it possible to send the same I2S data out to multiple pins whilst still using the same clocks for everything?

Is it possible to use I2S and I2C together without the I2S stream being affected?

ok so if I just leave the AUDIO_SAMPLE_RATE_EXACT as 48000 and then adjust CCM_ANALOG_PLL_AUDIO_NUM it will do the same thing?

I have 2 teensy boards that are using the same code. I am telling the compiler which code to run based on the level of a specific pin which I have tied to ground. This saves me from having one project per board. I want to adjust the value if AUDIO_SAMPLE_RATE_EXACT in the file audiostream.h to...

FYI, (back to me lol), I got the clock speed thing working so ... thanks...

Please do not apologise. I'm learning a heap. If my issue can trigger a wider conversation about something. I'm all ears. also, approx 46900 - 48550 Hz , C0 does not change when C2=10000000 so there is a wide range there too.

correct, but i have gone in close on the scope and messed with the numbers till I cant see any more movements

Well, changing that int to a float and changing the denom to 10000000 has now given me access to those decimals. Currently at #define AUDIO_SAMPLE_RATE_EXACT 48000.814f no more sliding clocks now.... so now i need to experiment with changing the PLL on the fly and see what happens

Its only transmitting raw data. I am transmitting a 32bit word (left & right together), 16 bit quality of course, at 48k and I'm using 16 buffers at a time in one packet

+1 I'm going to have a look now :)

AGREED!! Thats why I'm asking

Brilliant. I'll try that myself. But I did notice that changing AUDIO_SAMPLE_RATE_EXACT to something like 48000.1 had an effect but 48000.05 did not so... I'm still trying to work out how that floating point is used in the audio code when the clock function strips those decimals..

ok so I can just ditch that calculation code and make the numbers anything I want as calculated manually in excel? are there any limitations? it says c1 and C2 are 30 bit so looks like I can.. This might actually do the trick

If i use 1 teensy and dont use (air) then its no longer wireless, which is the whole point of the project I'm doing. The role of the second teensy is to provide user interface functionality ie. LCD, buttons, control of the audio board features. I'm playing with the code in excel now. I'm...

The AUDIO_SAMPLE_RATE_EXACT is a float but when it hits your code wont it lose the decimal accuracy? I'm trying to experiment with 48000.nnn and 47999.nnn . I've only been programming in C seriously for about 6 months so I'm still learning. My project only uses I2S so no need to worry about...

If a teensy 4 usb input is accidently fed more than 5 volts, what blows first? I have a spare teensy here for parts that i might try to fix if I know what blows, cheers