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| author | mrfaptastic <12006953+mrfaptastic@users.noreply.github.com> | 2021-03-08 18:49:56 +0000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-03-08 18:49:56 +0000 |
| commit | 10e24e95690cb8ee1830f4a8c5de06c33dace66c (patch) | |
| tree | dacc5c5b71bdd41455d5ca74e6fe3a3b5386869a | |
| parent | 3c8443eeb8d7474d1093901cc5d53598b458b5c0 (diff) | |
Update README.md
| -rw-r--r-- | README.md | 2 |
1 files changed, 2 insertions, 0 deletions
@@ -137,6 +137,8 @@ Although Arduino IDE does not [seem](https://github.com/arduino/Arduino/issues/4 ## Memory constraints If you are going to use large/combined panels make sure to check for [memory constraints](/doc/i2s_memcalc.md). +NOTE: You *cannot* use PSRAM to expand the amount of memory available to use by this library. ESP32 hardware [only allows DMA transfer from *internal* SRAM](https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-I2S-DMA/issues/55), so you will be limited to the 200KB or so of usable SRAM the ESP32 regardless of how many megabytes of PSRAM you may have connected. + ## Can I use with a larger panel (i.e. 64x64px square panel)? If you want to use with a 64x64 pixel panel (typically a HUB75*E* panel) you MUST configure a valid *E_PIN* to your ESP32 and connect it to the E pin of the HUB75 panel! Hence the 'E' in 'HUB75E' |