Not working on arduino Mega using hardware spi pins. about ledcontroller

[noah1510]

Some more information is needed.
What have you tried? What environment are you using to compile the code (Arduino IDE or PIO)? Do the examples work? If yes, do you mind posting a snippet of your code?

[CodyMoltar]

Hi! Instead of opening a new issue I thought I can continue here.

I'm trying to get your 7-Segment-counting.ino to work with an Arduino Mega. But to no avail.

As I understand it, the code defines the CS pin as 22, I connect the CS port of the display to pin 22 on the Mega.
Then I read in your documentation that the MOSI pin on a Mega is 51 and the CK is 52.

I think I'm missing something obvious here, since I'm not getting it to work.

Any help will be greatly appreciated!

[CodyMoltar]

A small update, when using the example code (7-segment-counting.ino) as before, but now connected to an Arduino UNO I do get some results.

I've connected the MOSI to 11 and the clock to 13 and connected the CS to pin 4 (and updated #define CS 22 to #define CS 4).

It starts counting normally, but I do get some odd glitches and weird characters showing. I recorded it and uploaded the video here: https://photos.app.goo.gl/yTX1fPBWzv6yTEYA6

[noah1510]

I personally only own an ESP32 so I can't test other hardware at home. Because of this I have never looked into the pin configuration for a lot of board (including the mega). Have you checked if port 22 can even output digital signals? If the hardware SPI does not work try specifying other pins that have a digital output as MOSI and CK pins (check this example on how to do that).

[noah1510]

This might be a problem in the example or the library. All the examples need to be rewritten when I have some time for that. What version of the arduino IDE do you use? This could also be a problem caused by some constants being defined differently on your platform.