From a7b19ca1620c5aec52e608e687c6319a8cf73dff Mon Sep 17 00:00:00 2001
From: Maix0 <39835848+Maix0@users.noreply.github.com>
Date: Thu, 16 Apr 2026 10:27:33 +0200
Subject: [PATCH] feat(ex03): removed extra files and do the case conversion

---
 ex03/Makefile    |  2 +-
 ex03/src/main.c  |  5 ++++-
 ex03/src/timer.c | 38 --------------------------------------
 3 files changed, 5 insertions(+), 40 deletions(-)
 delete mode 100644 ex03/src/timer.c

diff --git a/ex03/Makefile b/ex03/Makefile
index add8cae..5c58470 100644
--- a/ex03/Makefile
+++ b/ex03/Makefile
@@ -12,7 +12,7 @@ SERIAL=-P /dev/ttyUSB0 -b 115200
 SRC_DIR=src
 OBJ_DIR=build
 
-SRC_FILES=main.c utils.c uart.c timer.c
+SRC_FILES=main.c utils.c uart.c
 OBJ_FILES=$(patsubst %.c,%.o,$(SRC_FILES))
 
 SRC=$(addprefix $(SRC_DIR)/,$(SRC_FILES))
diff --git a/ex03/src/main.c b/ex03/src/main.c
index 55e6f3e..6dea53a 100644
--- a/ex03/src/main.c
+++ b/ex03/src/main.c
@@ -17,5 +17,8 @@ int main(void) {
 
 // UART_RX COMPLETE
 void __attribute__((signal)) __vector_18(void) {
-	uart_tx(UDR0);
+	char data = UDR0;
+	if ((data >= 'A' && data <= 'Z') || (data >= 'a' && data <= 'z'))
+		data ^= 0x20;
+	uart_tx(data);
 }
diff --git a/ex03/src/timer.c b/ex03/src/timer.c
deleted file mode 100644
index bc35f18..0000000
--- a/ex03/src/timer.c
+++ /dev/null
@@ -1,38 +0,0 @@
-
-#include <avr/io.h>
-#include <avr/interrupt.h>
-#include "mystd.h"
-#include "utils.h"
-
-#define PRESCALER 256
-#define TIMER_FREQ (F_CPU / PRESCALER)
-
-// at a high level:
-// Set the OC1B (PB2) pin as output
-// set the TIMER1 mode to COMPARE (CTC)
-// say to compare against OC1A
-// set the value to be compated at X count
-// say the presacler for the timer is 512
-//
-// all these information are on page ~140
-void timer1_init(void) {
-	// Set PB1 (OC1A) as output
-	DDRB   |= _BV(PB1);
-
-	// CTC mode (WGM12 = 1)
-	TCCR1B |= _BV(WGM12);
-
-	// Toggle OC1B on compare match (COM1B0 = 1)
-	// TCCR1A |= _BV(COM1A0);
-
-	// Set compare values
-	OCR1A	= TIMER_FREQ / 2;
-
-	// Start timer with prescaler 256 (CS12)
-	TCCR1B |= _BV(CS12);
-	
-	// set OCR1A interrupt
-	TIMSK1 = _BV(1);
-
-	sei();
-}