From 20e98aeb95e4bfb36bd13f275f34d738eb945968 Mon Sep 17 00:00:00 2001
From: Vineet K <git@vineetk.net>
Date: Sun, 21 Apr 2024 23:32:44 -0400
Subject: [PATCH] add notes circular buffer to piano lcd

---
 lcd.c | 50 +++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 43 insertions(+), 7 deletions(-)

diff --git a/lcd.c b/lcd.c
index 5501d86..d60cb1e 100644
--- a/lcd.c
+++ b/lcd.c
@@ -46,9 +46,6 @@ getNote(void)
 	// convert to capital hex
 	else if (c >= 0xa && c <= 0xf)
 		c = c - 0xa + 'A';
-	// shift to rest of alphabet
-	else if (c >= 0x10)
-		c = c - 0x10 + 'G';
 
 	return c;
 }
@@ -209,7 +206,6 @@ void displayNotes() {
 }
 
 
-
 void displaySerialData() {
     char circularBuffer[16];
     static int bufferIndex = 0;
@@ -251,10 +247,52 @@ void displaySerialData() {
     lcd_clear();
 }
 
+void displayPiano() {
+    char circularBuffer[16];
+    static int bufferIndex = 0;
+    lcd_clear();
+    lcd_gotoxy(6, 2);
+    lcd_print("PIANO");
+    _delay_ms(1000);
+    lcd_clear();
+    _delay_ms(1000);
+    while (buttonState == 0) {
+        char randomValue = getNote();
+
+        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;
+	    bufferIndex++;
+        }
+	
+        lcd_clear();
+	lcd_gotoxy(1,1);
+        for (int i = 0; i <= bufferIndex-1; i++) {
+            char singleChar[2] = {circularBuffer[bufferIndex- 1 - i], '\0'};
+	    lcd_gotoxy(i+1,1);
+	    lcd_print(singleChar); // Print the single character
+    	    lcd_gotoxy(6, 2);
+    	    lcd_print("PIANO");
+        }
+	
+        _delay_ms(1000);
+    }
+    bufferIndex = 0;
+    lcd_clear();
+}
+
 //*******************************************************
 int main(void) {
 	lcd_init();
 	lcd_hideCursor();
+	usart_init();
 	setup();
 	lcd_clear();
     	while (1) {
@@ -266,9 +304,7 @@ int main(void) {
 			displayNotes();
         	} 
 		else { 
-			lcd_gotoxy(6,2);
-			lcd_print("PIANO");
-			_delay_ms(1000);
+			displayPiano();
 		}
 	}
     	return 0;