Pj/easier to test

examples/FreeRam/FreeRam.ino

@@ -1,8 +1,21 @@
 #include <MemoryUsage.h>
 
+byte * p = 0;
+
+
+int updateStack(void)
+{
+    char volatile stuff[] = "updating stack!";
+    stuff[0] = 'U';
+    Serial.println((char *) stuff);
+    FREERAM_PRINT
+    return MU::getFreeRam();
+}
+
 void setup() 
 {
     Serial.begin(115200);
+    Serial.println(F( "Running " __FILE__ ", Built " __DATE__));
     Serial.println(F("Starting state of the memory:"));
     Serial.println();
 
@@ -13,12 +26,19 @@ void setup()
     MEMORY_PRINT_END
     MEMORY_PRINT_HEAPSIZE
 
+    updateStack();
+
     Serial.println();
     Serial.println();
 
     FREERAM_PRINT;
+
+    //byte *p = new byte[3000];
+    byte *p = new byte[300];  // Uno (ATmega328) only has 2k RAM
 
-    byte *p = new byte[3000];    
+    if(!p) {
+        Serial.println(F("could not allocate bytes for p[] array!"));
+    }
 
     Serial.println();
     Serial.println();
@@ -37,9 +57,15 @@ void setup()
     Serial.println();
 
     FREERAM_PRINT;
+
+    Serial.print(F("num STACK_COMPUTE calls: "));
+    Serial.println(numStackComputeCalls);
+
+    delete p;
+    p = 0;
 }
 
 void loop() 
 {
 
-}
+}

examples/GetMemorySize/GetMemorySize.ino

@@ -0,0 +1,53 @@
+#include <MemoryUsage.h>
+
+// Simple example to report memory sizes
+
+void reportAllocation(int numBytes) {
+
+    Serial.print(F("Allocating for "));
+    Serial.print( numBytes );
+    Serial.print(F(" bytes; "));
+
+    byte *p = new byte[numBytes];
+
+    if (p) {
+        Serial.println(F("...success."));
+    } else {
+        Serial.println(F("...allocation FAILED"));
+    }
+
+    MEMORY_PRINT_HEAPSIZE
+    FREERAM_PRINT
+
+    Serial.println(F("\ndeleting byte array with delete"));
+    delete p;   // don't want a memory leak!
+    p = 0;      // don't want a dangling/obsolete pointer
+
+    MEMORY_PRINT_HEAPSIZE
+    FREERAM_PRINT
+}
+
+void setup() {
+    Serial.begin(115200);
+    delay(1000);
+    Serial.println(F( "Running " __FILE__ ", Built " __DATE__));
+
+    Serial.println(F("\nStarting conditions"));
+    MEMORY_PRINT_TOTALSIZE
+    MEMORY_PRINT_HEAPSIZE
+    FREERAM_PRINT
+
+    Serial.println(F("\nallocate a byte array with new; too big to fit in RAM?"));
+    reportAllocation(3000);
+
+    Serial.println(F("\nallocate smaller byte array with new (it should fit)"));
+    reportAllocation(300);
+
+    Serial.println(F("\nFinal conditions"));
+    MEMORY_PRINT_HEAPSIZE
+    FREERAM_PRINT
+}
+
+void loop() {
+    // User reads output from setup().
+}

examples/Stack/Stack.ino

@@ -15,9 +15,30 @@ void subPointer(rhaaa *apSample);
 void subSmartPointer(rhaaa &aSample);
 void subConstSmartPointer(const rhaaa &aSample);
 
+inline void reportMemoryInfo(void)
+{
+    STACK_COMPUTE
+
+    MEMORY_PRINT_START
+    MEMORY_PRINT_HEAPSTART
+    MEMORY_PRINT_HEAPEND
+    MEMORY_PRINT_STACKSTART
+    MEMORY_PRINT_END
+    MEMORY_PRINT_STACKSIZE
+
+    STACK_PRINT
+
+    STACKPAINT_PRINT
+    Serial.println();
+}
+
 void setup() 
 {
     Serial.begin(115200);
+    Serial.println(F( "Running " __FILE__ ", Built " __DATE__));
+
+    reportMemoryInfo();
+    //STACK_COMPUTE
 
     // An instance of the sample is declared, and the string is filled with
     // some string to see how to access to it inside functions !
@@ -31,14 +52,7 @@ void setup()
     Serial.println(F("Starting state of the memory:"));
     Serial.println();
 
-    MEMORY_PRINT_START
-    MEMORY_PRINT_HEAPSTART
-    MEMORY_PRINT_HEAPEND
-    MEMORY_PRINT_STACKSTART
-    MEMORY_PRINT_END
-    MEMORY_PRINT_STACKSIZE
-
-    STACKPAINT_PRINT
+    reportMemoryInfo();
 
     Serial.println();
     Serial.println();
@@ -68,20 +82,18 @@ void setup()
     // No data as argument, nut a nig array of doubles inside the function...
     subLocalData();
 
-    STACKPAINT_PRINT
+    //STACKPAINT_PRINT
 
     Serial.println();
     Serial.println();
 
     Serial.println(F("Ending state of the memory:"));
     Serial.println();
 
-    MEMORY_PRINT_START
-    MEMORY_PRINT_HEAPSTART
-    MEMORY_PRINT_HEAPEND
-    MEMORY_PRINT_STACKSTART
-    MEMORY_PRINT_END
-    MEMORY_PRINT_STACKSIZE
+    reportMemoryInfo();
+
+    Serial.print(F("num STACK_COMPUTE calls: "));
+    Serial.println(numStackComputeCalls);
 
     Serial.println();
     Serial.println();
@@ -91,43 +103,31 @@ void subFull(rhaaa aSample)
 {
     Serial.println("subFull");
     Serial.println(aSample.text);
-    MEMORY_PRINT_STACKSTART
-    MEMORY_PRINT_END
-    MEMORY_PRINT_STACKSIZE
-    STACK_PRINT
+    reportMemoryInfo();
     Serial.println();
 }
 
 void subPointer(rhaaa *apSample)
 {
     Serial.println("subPointer");
     Serial.println(apSample->text);
-    MEMORY_PRINT_STACKSTART
-    MEMORY_PRINT_END
-    MEMORY_PRINT_STACKSIZE
-    STACK_PRINT
+    reportMemoryInfo();
     Serial.println();
 }
 
 void subSmartPointer(rhaaa &aSample)
 {
     Serial.println("subSmartPointer");
     Serial.println(aSample.text);
-    MEMORY_PRINT_STACKSTART
-    MEMORY_PRINT_END
-    MEMORY_PRINT_STACKSIZE
-    STACK_PRINT
+    reportMemoryInfo();
     Serial.println();
 }
 
 void subConstSmartPointer(const rhaaa &aSample)
 {
     Serial.println("subConstSmartPointer");
     Serial.println(aSample.text);
-    MEMORY_PRINT_STACKSTART
-    MEMORY_PRINT_END
-    MEMORY_PRINT_STACKSIZE
-    STACK_PRINT
+    reportMemoryInfo();
     Serial.println();
 }
 
@@ -141,14 +141,12 @@ void subLocalData()
         v[i] = (double)i;
 
     Serial.println(v[10]);
-    MEMORY_PRINT_STACKSTART
-    MEMORY_PRINT_END
-    MEMORY_PRINT_STACKSIZE
-    STACK_PRINT
+    reportMemoryInfo();
     Serial.println();
 }
 
 void loop() 
 {
 
-}
+}
+