ScStw/ESP32-HUB75-MatrixPanel-DMA
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ESP32-HUB75-MatrixPanel-DMA/examples/One_Eight_1_8_ScanPanel/README.md
mrfaptastic b810dca9d1 1/8 Scan Panel Example 
#154 #204

Also supports chaining.
2021-11-22 07:43:07 +00:00

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Using this library with 32x16 1/8 Scan Panels

Problem

ESP32-HUB75-MatrixPanel-I2S-DMA library will not display output correctly with 1/8 scan panels such as this by default.

Solution

It is possible to connect 1/8 scan panels to this library and 'trick' the output to work correctly on these panels by way of adjusting the pixel co-ordinates that are 'sent' to the ESP32-HUB75-MatrixPanel-I2S-DMA library (in this example, it is the 'dmaOutput' class).

Creation of a 'OneEighthScanMatrixPanel.h' class which sends an adjusted drawPixel() x,y co-ordinates to the underlying ESP32-HUB75-MatrixPanel-I2S-DMA library's drawPixel routine, to trick the output to look pixel perfect.

Refer to the '1_8_ScanPanel.h' logic which builds upon the library's core 'Virtual Display' (ESP32-VirtualMatrixPanel-I2S-DMA.h) to also support chaining of 1/8 Scan Panels. Refer to 'ChainedPanels' example on how to configure panel chaining to create bigger displays.