Search results

@MarkT They are rotary encoders. Im not sure the polling frequency I'm having someone help on the code side. We are using interrups as the main approach. I just saw that the SK9822 LEDS don't actually need to be on a SPI line, they can be on 2 digital pins, so I might go that route. Any suggestions?

Hi, I am working on a MIDI controller with the Teensy 4.1 it has one SPI line with 8 MCP23s17 each MCP has 8 encoders on it and another 2 MCPs have 32 buttons on them. I have another SPI line with a EVE display screen. Now I want to add 64 Dot Star SK8922 LEDS they use SPI. I have heard adding...

Hi I am working on a MIDI controller project with a Teensy 4.1. I upgraded the SPI display screen to a 8- bit 320x240 3.5" TFT CFAF320240F-035T. I am having trouble getting the MIDI controllers UI to display. I was able to incorporate a test sketch with blue, red and green color bars to move...

@KurtE yes that is definitely part of the problem. I did not have PS3-PS0 hooked up at all. Thanks for the insight!

@BriComp Thanks for the tip and for reposting! Will keep that in midi for the future.

Hello everyone, “I’m upgrading my display screen to a CFAF320240F-035T TFT and switching from SPI to an 8-bit parallel interface. I’m having trouble getting it to work, so far the screen only shows solid white. I’ve been testing with simple sketches, and while the screen sometimes pulses...

So would it look like this? On the actual chip the VDD and VSS are right next to each other to the capacitor could be close to the pin, but this schematic doesn't feel right.

I'm a little confused on how the decoupling capacitor should be placed. It's supposed to connect the VSS and VDD, right?

is this .1uf decoupling capacitor on pin 9 correct?

Yes I'm using separate CS for each MCP23S17 chips

Thanks SK Pang! The voltage is 3.3

Sorry for the delay Thanks for your tip, it helped!

Hi I am working on a MIDI controller project. This is my first Kicad schematic, I'm setting up multiple mcp23s17s to a Teensy 4.1 to expand the pin number for encoders. Would anybody out there mind taking a look at the schematic and seeing if it is correct so far. Are there any changes I should...

Here is a photo. Sorry its hard to see what going on in this rats nest.

Hi Im working on a midi controller I'm using the Teensy 4.1 with a mpc23s17 I currently have 8 encoders wired up to the mcp. When I turn the encoders I have to turn them almost a full rotation to get it to move one or two increments on the serial monitor. Anybody have any tips? Thanks in...