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psram-aware malloc functions (backport of upstream #4895) (#342)

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Introduces new memory allocation functions, based on wled#4895 by @DedeHai

* keep a minimum of 15KB RAM available to UI - improves stability
* S3/S2/C3 automatically use "fast RTC Ram" for small data (reduces fragmentation)
* auto-detects PSRAM (or no PSRAM) when firmware was built with -D BOARD_HAS_PSRAM
* d_malloc() and d_calloc() prefer DRAM if possible (faster), but fall back to PSRAM when free RAM gets low.
This commit is contained in:
Frank Möhle
2026-02-18 17:57:47 +01:00
committed by GitHub
parent 50bb4d2910
commit cce3c0b5d3
19 changed files with 696 additions and 191 deletions
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11
wled00/presets.cpp
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@@ -77,16 +77,11 @@ static void doSaveState() {
*/
#if defined(ARDUINO_ARCH_ESP32)
if (!persist) {
if (tmpRAMbuffer!=nullptr) free(tmpRAMbuffer);
if (tmpRAMbuffer!=nullptr) p_free(tmpRAMbuffer);
size_t len = measureJson(*fileDoc) + 1;
DEBUG_PRINTLN(len);
// if possible use SPI RAM on ESP32
#if defined(BOARD_HAS_PSRAM) && (defined(WLED_USE_PSRAM) || defined(WLED_USE_PSRAM_JSON)) // WLEDMM
if (psramFound())
tmpRAMbuffer = (char*) ps_malloc(len);
else
#endif
tmpRAMbuffer = (char*) malloc(len);
tmpRAMbuffer = (char*) p_malloc(len);
if (tmpRAMbuffer!=nullptr) {
serializeJson(*fileDoc, tmpRAMbuffer, len);
} else {
@@ -298,7 +293,7 @@ void handlePresets()
#if defined(ARDUINO_ARCH_ESP32)
//Aircoookie recommended not to delete buffer
if (tmpPreset==255 && tmpRAMbuffer!=nullptr) {
free(tmpRAMbuffer);
p_free(tmpRAMbuffer);
tmpRAMbuffer = nullptr;
}
#endif