mah
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Thanks for your quick reply, ill guess ill have to hunt down a screen with the ili9488 controller then :) But it looks very promising, i just hope i'm interpreting this right:

just changed the 10k to 110R and now its working, gonna change my new boards to 5v but for now 3.3 works regarding software controlled trs control, it would be awesome, i read in the stackechange post something about...

Just wanted to know if it was safe to try this, changing the power to 5volts? And change r114 from 10k to 110R? Don't wanna fry (another) teensy :)

Just tried to change the 10k resistor to a 4.7k one, keeping the power cuircuit at 3.3v and it does not seem to work like this:

OK, but then i could probably use my original schematic, but changing it like this? or should i keep 3.3v on the power protection? The reason i sleected the MC74VHC1GT04 was because i read this in the datasheet,...

like this maybe?

maybe a 74AHCT240 will do the trick, or MC74VHC1GT04?

Ye, ok thx. midi stuff don't recognize any input, so i guess this circuit don't work with 3.3v

That sounds good, are there any 74hct that can buffer, level shift and invert the signal?

I tested the "plug in and out issue" with another device(elektron machinedrum), and it does not seem to care have many times i plug the cable in and out , so i blaming the device(squarp pyramid)

that did it, thanks! :D

btw, by changing pin i mean changing pin no. in the constructor, not changing any physical connection as im using a pcb i made

yeah, but pin 10 is used for another spi device, so a bit of a problem there, could this be some kind of software bugg? i tried using the adc (that uses cs 10) and the mcp at the same time and had no problems(accept...

well im happy that it works, but a bit anoyed i have the change CS pins on every new power up :) and thanks for trying to help!

im not using the adc when testing the mcp, im using your example in first post as i said, and no added code. The adc and a couple of other things are attached to the same spi bus. but i dont try to communicate to them....

wtf, sucess! i changes CS to 36, then back to 37 and it started working! if i cut power i need change to 36 then back to 37 again to make it work.

i dont know what to test anymore. very confused, i have continuity on the miso line, between teensy and the mcp, i have an adc sends data on the same spi bus just fine. there seem to be data sent and recived only when...

very strange. using this lib i can write: https://github.com/sumotoy/gpio_MCP23S17/blob/master/gpio_MCP23S17.h no sucess at reading though code: #include <SPI.h> #include <gpio_MCP23S17.h> // import library...

mosi: 11 miso: 12 clk: 13

Yes, i tried, just get "no mpc detected" could it be that i i got some other lib named "mcp23s17.h" installed that interferes? if i get the no mpc ouput in the serial monitor i guess least the library works correct?...

Hi, im having trouble using this lib with my teensy 4, i have used another lib to successfully setting the outputs of the mcp from low to high and back. but this library just says no mcp detected. could anyone make a...