From 6a1b70c5580cef160e6446a0a152028a29d4bdc5 Mon Sep 17 00:00:00 2001
From: Ing-Dom <dom@ing-dom.de>
Date: Fri, 20 Jan 2023 15:18:41 +0100
Subject: [PATCH] add commitNonVolatileMemory overload to batch write chars n
 times to flash

---
 src/knx/platform.cpp | 31 +++++++++++++++++++++++++++++++
 src/knx/platform.h   |  1 +
 2 files changed, 32 insertions(+)

diff --git a/src/knx/platform.cpp b/src/knx/platform.cpp
index 3c2a74e..241dd14 100644
--- a/src/knx/platform.cpp
+++ b/src/knx/platform.cpp
@@ -201,6 +201,37 @@ uint32_t Platform::writeNonVolatileMemory(uint32_t relativeAddress, uint8_t* buf
     }
 }
 
+// writes value repeat times into flash starting at relativeAddress
+// returns next free relativeAddress
+uint32_t Platform::writeNonVolatileMemory(uint32_t relativeAddress, uint8_t value, size_t repeat)
+{
+    if(_memoryType == Flash)
+    {
+        while (repeat > 0)
+        {
+            loadEraseblockContaining(relativeAddress);
+            uint32_t start = _bufferedEraseblockNumber * (flashEraseBlockSize() * flashPageSize());
+            uint32_t end = start +  (flashEraseBlockSize() * flashPageSize());
+
+            uint32_t offset = relativeAddress - start;
+            uint32_t length = end - relativeAddress;
+            if(length > repeat)
+                length = repeat;
+            memset(_eraseblockBuffer + offset, value, length);
+            _bufferedEraseblockDirty = true;
+
+            relativeAddress += length;
+            repeat -= length;
+        }
+        return relativeAddress;
+    }
+    else
+    {
+        memset(getEepromBuffer(KNX_FLASH_SIZE)+relativeAddress, value, repeat);
+        return relativeAddress+repeat;
+    }
+}
+
 void Platform::loadEraseblockContaining(uint32_t relativeAddress)
 {
     int32_t blockNum = getEraseBlockNumberOf(relativeAddress);
diff --git a/src/knx/platform.h b/src/knx/platform.h
index 21a2867..304e351 100644
--- a/src/knx/platform.h
+++ b/src/knx/platform.h
@@ -70,6 +70,7 @@ class Platform
     virtual void commitNonVolatileMemory();
     // address is relative to start of nonvolatile memory
     virtual uint32_t writeNonVolatileMemory(uint32_t relativeAddress, uint8_t* buffer, size_t size);
+    virtual uint32_t writeNonVolatileMemory(uint32_t relativeAddress, uint8_t value, size_t repeat);
 
     NvMemoryType NonVolatileMemoryType();
     void NonVolatileMemoryType(NvMemoryType type);