ScStw/ESP32-HUB75-MatrixPanel-DMA
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Merge branch 'master' of https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-DMA

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mrfaptastic 2023-04-19 01:35:28 +01:00
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@ -54,7 +54,7 @@ A typical 64x32px panel at 24bpp colour uses about 20kB of internal memory.
Please use the ['Memory Calculator'](/doc/memcalc.md) to see what is *typically* achievable with the typical ESP32. ![Memory Calculator](doc/memcalc.jpg) Please use the ['Memory Calculator'](/doc/memcalc.md) to see what is *typically* achievable with the typical ESP32. ![Memory Calculator](doc/memcalc.jpg)
For the ESP32-S3 only, you can use SPIRAM/PSRAM to drive the HUB75 DMA buffer when using **Octal SPI-RAM** (i.e. ESP32 S3 N8R8 variant). However, due to bandwidth limitations, the maximum output frequency is limited to approx. 13Mhz, which will limit the real-world number of panels that can be chained without flicker. For the ESP32-S3 only, you can use SPIRAM/PSRAM to drive the HUB75 DMA buffer when using an ESP32-S3 with **OCTAL SPI-RAM (PSTRAM)** (i.e. ESP32 S3 N8R8 variant). However, due to bandwidth limitations, the maximum output frequency is limited to approx. 13Mhz, which will limit the real-world number of panels that can be chained without flicker. Please do not use PSRAM as the DMA buffer if using QUAD SPI (Q-SPI), as it's too slow.
To enable PSRAM support on the ESP32-S3, refer to [the build options](/doc/BuildOptions.md) to enable. To enable PSRAM support on the ESP32-S3, refer to [the build options](/doc/BuildOptions.md) to enable.