The marker is a comment at the very end of the file, so it prints nothing, and it is removed from a source before the source is converted. An editor that adds a newline after the marker makes the file ...
The classic pins are the VSPI (SPI3) IOMUX set; the S3 pins are the FSPI (SPI2) IOMUX set (GPIO9–14, chosen to avoid the S3's internal flash/PSRAM pins GPIO26–37 and all strapping/USB/UART pins). Pins ...
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