Control an LED matrix display with SAMD21

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I want to control a 16x32 LED matrix display with a SAMD21. Does anyone have an app for this, also the schematic of the display? There are very many descriptions of the displays, but very little about controlling them and up to now no schematics found

Thanks for any hints

Jerry

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Last Edited: Mon. Mar 28, 2022 - 09:15 AM
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Found! See "Schematic" quite far down on the page https://www.ebay.de/itm/18236358...

This should enable me to write the driver

Jerry