From 26d04ee4de6c0306120c5ee1616c3e51f51328f6 Mon Sep 17 00:00:00 2001
From: Sadeep Madurange <sadeep@asciimx.com>
Date: Mon, 4 Aug 2025 21:17:51 +0800
Subject: Refactor UART code to separate file.

---
 uart.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 uart.c

(limited to 'uart.c')

diff --git a/uart.c b/uart.c
new file mode 100644
index 0000000..1a9956d
--- /dev/null
+++ b/uart.c
@@ -0,0 +1,31 @@
+#include <avr/io.h>
+#include <util/setbaud.h>
+
+#include "uart.h"
+
+void uart_init(void)
+{
+	UBRR0H = UBRRH_VALUE;
+	UBRR0L = UBRRL_VALUE;
+#if USE_2X
+	UCSR0A |= (1 << U2X0);
+#else
+	UCSR0A &= ~(1 << U2X0);
+#endif
+	UCSR0B = (1 << TXEN0) | (1 << RXEN0);
+	UCSR0C = (1 << UCSZ01) | (1 << UCSZ00);
+}
+
+uint8_t uart_recv(void)
+{
+	while (!(UCSR0A & (1 << RXC0)))
+		;
+	return UDR0;
+}
+
+void uart_send(uint8_t c)
+{
+	while (!(UCSR0A & (1 << UDRE0)))
+		;
+	UDR0 = c;
+}
-- 
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