Add chaining mode

[subkhan198]

hello bro, can you add snack chaining, so it only requires 1 P_LAT pin when you want to add a row on the DMD panel?
https://adebenham.com/files/arduino/multi-DMD.svg

[subkhan198]

This is an example of an image if you use a 4X3 panel

[tort32]

Definitely useful feature to have.
But unfortunately I have no access to the hardware to dev/test it now.

[subkhan198]

Would you mind emailing me an update so I can debug your code? I have the hardware to test it. If it works, I'll post it here.
this is my email : subkhan804@gmail.com

[tort32]

@subkhan198 Work is in progress.
I managed to map pixels for zig-zag chaining configuration (hopefully correct), but in the reverse order compare to your picture with MCU streaming data into Panel 1 (left-top).
I'll make a test branch when figure out how to propely define setup code for this configuration.

What is your display size in modules (X by Y)? Each module is 32x16 pixels with 1/4 scan, right?

[subkhan198]

@subkhan198 Work is in progress. I managed to map pixels for zig-zag chaining configuration (hopefully correct), but in the reverse order compare to your picture with MCU streaming data into Panel 1 (left-top). I'll make a test branch when figure out how to propely define setup code for this configuration.

What is your display size in modules (X by Y)? Each module is 32x16 pixels with 1/4 scan, right?
yes, sir, i use modules (X by Y)? Each module is 32x16 pixels with 1/4 scan

[subkhan198]

for your reference, i usually use this library (but this library only support for ESP8266 not for ESP32):
https://github.com/busel7/DMDESP}
In this library, I can apply wiring as shown in the image above (the direction of the blue line is the direction of the DMD data cable), so even though the DMD panel is reversed (in the direction of the arrow on the DMD panel), the final result that I wrote on the DMD panel is normal.

[tort32]

@subkhan198

yes, sir, i use modules (X by Y)?

I mean how much panels do you use for your display?

Is ESP connected to the right-lower panel (if looking into display face)?

[subkhan198]

I mean how much panels do you use for your display?
Can you make it compatible, so it Will be declare on main code (panel_weigh and panel_high)

Is ESP connected to the right-lower panel (if looking into display face)?
Yes, sir

[tort32]

@subkhan198 please try the latest main branch. I didn't publish new version yet.
If you use Arduino IDE you can upgrade your local library files from this repo.
(https://docs.arduino.cc/software/ide-v1/tutorials/installing-libraries/#manual-installation)

There is a new function to configure the chaining:
https://github.com/tort32/PxMatrix/blob/main/examples/scan/scan.ino#L80

This example should render two crossing lines which are moving and scanning the whole display.
And this how it looks in my emulator

[tort32]

MCU streaming data into Panel 1 (left-top).

I think this was a mistake. Should be fixed now:

[subkhan198]

thanks for your repply @tort32
ok i will try this update and I will tell you the results later

[subkhan198]

after i try sample : https://github.com/tort32/PxMatrix/blob/main/examples/scan/scan.ino#L80
based on the instructions from the image you provided, the results displayed are: The vertical line moves from left to right (we are facing the display) and the horizontal line moves from top to bottom after the vertical line reaches the end (column 128), and so on and so forth.