Update example

avr/libraries/Optiboot_flasher/examples/SerialReadWrite/SerialReadWrite.ino

@@ -39,7 +39,7 @@
 // Define your termination and blank character here
 const char terminationChar = '@';
 
-// This is the character that gets printed if the memory doesn't contain any data
+// This is the character that gets printed if the memory block doesn't contain any data
 const char blankChar = '.';
 
 
@@ -52,7 +52,7 @@ char returnToMenu;
 uint8_t ramBuffer[SPM_PAGESIZE];
 
 // This array allocates the space you'll be able to write to
-const char flashSpace[SPM_PAGESIZE * NUMBER_OF_PAGES] __attribute__ (( aligned(SPM_PAGESIZE) )) PROGMEM = {
+const uint8_t flashSpace[SPM_PAGESIZE * NUMBER_OF_PAGES] __attribute__ (( aligned(SPM_PAGESIZE) )) PROGMEM = {
   "This some default content stored on page one"
 };
 
@@ -77,10 +77,13 @@ void loop()
   Serial.print(F("| There are "));
   Serial.print(NUMBER_OF_PAGES);
   Serial.println(F(" pages that can be read/written to. |"));
+  Serial.print(F("| Total assigned flash space: "));
+  Serial.print(NUMBER_OF_PAGES * SPM_PAGESIZE);
+  Serial.println(F(" bytes.        |"));
   Serial.println(F("| Change the NUMBER_OF_PAGES constant to         |"));
   Serial.println(F("| increase or decrease this number.              |"));
   Serial.println(F("|                                                |"));
-  Serial.println(F("| Please tell me what you want to do:            |"));
+  Serial.println(F("| What do you want to do?                        |"));
   Serial.println(F("| 1. Show current flash content                  |"));
   Serial.println(F("| 2. Write to flash memory                       |"));
   Serial.println(F("|------------------------------------------------|"));
@@ -120,22 +123,41 @@ void loop()
         Serial.println(F(". The number of pages can be extended by changing NUMBER_OF_PAGES constant"));
       }
     }
-    while(pageNumber < 1 || pageNumber > NUMBER_OF_PAGES);
-    Serial.println(pageNumber);
+    while(pageNumber > NUMBER_OF_PAGES);
+
+    if(pageNumber > 0)
+      Serial.println(pageNumber);
 
     // READ SELECTED PAGE AND STORE THE CONTENT IN THE ramBuffer ARRAY
     // flash_buffer is where the data is stored (contains the memory addresses)
     // ramBuffer is where the data gets stored after reading from flash
     // pageNumber is the page the data is read from
     // blankChar is the character that gets printed/stored if there are unused space (default '.')
     // use optiboot_readPage(flashSpace, ramBuffer, pageNumber) if you don't want blank chars
-    optiboot_readPage(flashSpace, ramBuffer, pageNumber, blankChar);
-
-    // Print page content
-    Serial.print(F("\nContent of page "));
-    Serial.print(pageNumber);
-    Serial.println(F(":"));
-    Serial.println((char*)ramBuffer);
+
+    if(pageNumber == 0) // Read all pages
+    {
+      Serial.println(F("\nAll flash content:"));
+      for(uint16_t page = 1; page < NUMBER_OF_PAGES+1; page++)
+      {
+        Serial.print(F("Page "));
+        Serial.print(page);
+        Serial.print(F(": "));
+        optiboot_readPage(flashSpace, ramBuffer, page, blankChar);
+        Serial.println((char*)ramBuffer);
+      }
+    }
+    else // Read selected page
+    {
+      optiboot_readPage(flashSpace, ramBuffer, pageNumber, blankChar);
+
+      // Print page content
+      Serial.print(F("\nContent of page "));
+      Serial.print(pageNumber);
+      Serial.println(F(":"));
+      Serial.println((char*)ramBuffer);
+    }
+
   }  // End of flash read option