From 8aeb9e1abeebf847686a74e24d93964e01f5d4c7 Mon Sep 17 00:00:00 2001
From: Damian Schneider <daedae@gmx.ch>
Date: Thu, 28 Aug 2025 18:57:11 +0200
Subject: [PATCH] bugfix in PS pointer alignment

- bug was leading to crashes when heap is low
---
 wled00/FXparticleSystem.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/wled00/FXparticleSystem.cpp b/wled00/FXparticleSystem.cpp
index 21061a098..8b684a5f6 100644
--- a/wled00/FXparticleSystem.cpp
+++ b/wled00/FXparticleSystem.cpp
@@ -1118,7 +1118,7 @@ bool initParticleSystem2D(ParticleSystem2D *&PartSys, uint32_t requestedsources,
       allocsuccess = true;
       break; // allocation succeeded
     }
-    numparticles /= 2; // cut number of particles in half and try again
+    numparticles = ((numparticles / 2) + 3) & ~0x03; // cut number of particles in half and try again, must be 4 byte aligned
     PSPRINTLN(F("PS 2D alloc failed, trying with less particles..."));
   }
   if (!allocsuccess) {
@@ -1815,7 +1815,7 @@ bool initParticleSystem1D(ParticleSystem1D *&PartSys, const uint32_t requestedso
       allocsuccess = true;
       break; // allocation succeeded
     }
-    numparticles /= 2; // cut number of particles in half and try again
+    numparticles = ((numparticles / 2) + 3) & ~0x03; // cut number of particles in half and try again, must be 4 byte aligned
     PSPRINTLN(F("PS 1D alloc failed, trying with less particles..."));
   }
   if (!allocsuccess) {