Started following some tutorial on att85 usi. Downloaded example code from make avr book.

Make AVR Examples/Chapter19_EEPROM/vigenereCipher/vigenereCipher.c_outline

@@ -0,0 +1,55 @@
+/*
+Vigenere Cipher encoder / decoder demo
+And an excuse to play around with EEPROM memory
+ */
+
+#include "vigenereCipher.h"
+
+// -------- Functions --------- //
+
+void printFromEEPROM(char *eepromString);
+void enterText(char text[]);
+void displayCodes(void);
+void changeCode(char codeBuffer[]);
+void selectCode(char code[]);
+void encodeVigenere(char text[], char code[]);
+void decodeVigenere(char text[], char code[]);
+
+int main(void) {
+  // -------- Inits --------- //
+
+  char textBuffer[MAX_TEXT_LENGTH];
+  char codeString[CODE_LEN];
+  char input;
+  initUSART();
+
+  // ------ Event loop ------ //
+  while (1) {
+
+    // Menu
+    printFromEEPROM(welcomeString);
+    // .... more fany menu printing
+    printFromEEPROM(menuDecode);
+    input = receiveByte();
+
+    switch (input) {
+    case 'e':                  // encode
+      encodeVigenere(textBuffer, codeString);
+      break;
+    case 'd':                  // decode
+      decodeVigenere(textBuffer, codeString);
+      break;
+    case 'n':                  // new text
+      printFromEEPROM(promptTypeText);
+      enterText(textBuffer);
+      break;
+    case 'c':                  // choose code
+      selectCode(codeString);
+      break;
+    case 'x':                  // change code
+      changeCode(codeString);
+      break;
+    }
+  }                                                  /* End event loop */
+  return (0);                            /* This line is never reached */
+}