Trying to fix scrolling

lcd.c

@@ -23,6 +23,7 @@ char notesBuffer[NOTES_BUFFER_SIZE];
 int serialIndex = 0;
 int notesIndex = 0;
 volatile int buttonState = 0; // Holds the state of all buttons
+			      //
 void lcd_putValue(unsigned char val)
 {
 	LCD_DPRT &= 0x0F;
@@ -133,20 +134,26 @@ ISR(PCINT1_vect) {
     // Update button state when any pin changes state
     for (unsigned char i = 0; i <= 5; i++) {
 	    if (PINC & (1 << i)) {
-		    buttonState = i;
+		    if(buttonState == 0) 
+		    	buttonState = i;
+		    else
+			buttonState = 0;
 		    break;
 	    }
     }
 }
 
-void displaySerialData() {
+void displayNotes() {
     char circularBuffer[16];
     static int bufferIndex = 0;
 
     lcd_clear();
     lcd_gotoxy(1, 1);
-    lcd_print("KindaGood");
+    lcd_print("Play");
-    while ((PINC & _BV(5)) == 0) {
+    _delay_ms(1000);
+    lcd_clear();
+    _delay_ms(1000);
+    while (buttonState == 4) {
         char randomValue = '0' + (rand() % 10);
 
         if (bufferIndex == 16) {
@@ -163,32 +170,57 @@ void displaySerialData() {
 
         lcd_clear();
         lcd_gotoxy(1, 1);
-        for (int i = 0; i < 16; i++) {
+        for (int i = 0; i < bufferIndex; i++) {
+            char singleChar[2] = {circularBuffer[bufferIndex - i], '\0'};
+	    lcd_gotoxy(16 - i, 1);
+	    lcd_print(singleChar); // Print the single character
+        }
+
+        _delay_ms(1000);
+    }
+    bufferIndex = 0;
+    lcd_clear();
+}
+
+
+
+void displaySerialData() {
+    char circularBuffer[16];
+    static int bufferIndex = 0;
+    lcd_clear();
+    lcd_gotoxy(1, 1);
+    lcd_print("Record");
+    _delay_ms(1000);
+    lcd_clear();
+    _delay_ms(1000);
+    while (buttonState == 5) {
+        char randomValue = '0' + (rand() % 10);
+
+        if (bufferIndex == 16) {
+            // Remove the first value and shift other values down
+            for (int i = 0; i < 16 - 1; i++) {
+                circularBuffer[i] = circularBuffer[i + 1];
+            }
+            // Add the new value at the end
+            circularBuffer[16 - 1] = randomValue;
+        } else {
+            // Add the new value to the buffer
+            circularBuffer[bufferIndex++] = randomValue;
+        }
+
+        lcd_clear();
+	lcd_gotoxy(1,1);
+        for (int i = (bufferIndex > 16) ? bufferIndex - 16 : 0; i < bufferIndex; i++) {
             char singleChar[2] = {circularBuffer[i], '\0'};
 	    lcd_print(singleChar); // Print the single character
         }
 
         _delay_ms(1000);
     }
+    bufferIndex = 0;
     lcd_clear();
 }
 
-
-
-void displayNotes() {
-    lcd_clear();
-    lcd_gotoxy(1, 1);
-    while (buttonState == 4) {
-        char newNote = getNote();
-        if (newNote != '\0') {
-            // Add new note to the right side of line 1 of the LCD
-            // Push existing notes to the left
-            // Display on LCD
-        }
-        _delay_ms(1000); // Adjust delay as needed
-    }
-}
-
 //*******************************************************
 int main(void) {
 	lcd_init();
@@ -200,18 +232,10 @@ int main(void) {
     	while (1) {
 		// Check button state and perform actions accordingly
         	if (buttonState == 5) {
-			lcd_gotoxy(1,1);
-			lcd_print("good");
 			displaySerialData();
-			buttonState = 0;
 
        		} else if (buttonState == 4) {
-			lcd_clear();
+			displayNotes();
-            		lcd_gotoxy(1,2);
-			lcd_print("Button A4 Works");
-			_delay_ms(100);
-			buttonState = 0;
-			//displayNotes();
         	}
 	}
     	return 0;