Chris Womack / DMSupport

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Dependencies:   DM_FATFileSystem DM_HttpServer DM_USBHost EthernetInterface USBDevice mbed-rpc mbed-rtos mbed-src

Dependents:   emptyProgram

Fork of DMSupport by Embedded Artists

Diff: Memory/InternalEEPROM.cpp

Revision:
34:fc366bab393f
Parent:
29:b1ec19000e15
diff -r 8a0a99d54bf8 -r fc366bab393f Memory/InternalEEPROM.cpp
--- a/Memory/InternalEEPROM.cpp	Thu Feb 19 14:41:14 2015 +0100
+++ b/Memory/InternalEEPROM.cpp	Mon Mar 09 11:15:56 2015 +0100
@@ -152,6 +152,14 @@
   uint32_t pageAddr = addr/EEPROM_PAGE_SIZE;
   uint32_t readOffset = (addr & (EEPROM_PAGE_SIZE - 1));
   uint32_t readSize = EEPROM_PAGE_SIZE - readOffset;
+  
+  // Prevent reading past the end of the memory
+  if (addr >= EEPROM_MEMORY_SIZE) {
+    return 0;
+  }
+  if ((size + addr) > EEPROM_MEMORY_SIZE) {
+    size = EEPROM_MEMORY_SIZE - addr;
+  }
 
   powerUp();
 
@@ -181,6 +189,14 @@
   uint32_t writeOffset = (addr & (EEPROM_PAGE_SIZE - 1));
   uint32_t writeSize = EEPROM_PAGE_SIZE - writeOffset;
 
+  // Prevent writing past the end of the memory
+  if (addr >= EEPROM_MEMORY_SIZE) {
+    return 0;
+  }
+  if ((size + addr) > EEPROM_MEMORY_SIZE) {
+    size = EEPROM_MEMORY_SIZE - addr;
+  }
+
   powerUp();
 
   // Read and store data in buffer
@@ -202,17 +218,3 @@
   }
   return numWritten;
 }
-
-//void InternalEEPROM::erasePage(uint32_t pageAddr)
-//{
-//  powerUp();
-//
-//  clearInterrupt(EEPROM_INT_ENDOFRW);
-//  setCmd(EEPROM_CMD_32BITS_WRITE);
-//  setAddr(pageAddr, 0);
-//  for (int i = 0; i < EEPROM_PAGE_SIZE; i+=4) {
-//    LPC_EEPROM->WDATA = 0;
-//    waitForInterrupt(EEPROM_INT_ENDOFRW);
-//  }
-//  eraseOrProgramPage(pageAddr);
-//}