From 0505401d0bfac2b2bcf6ff85c61d71827888e897 Mon Sep 17 00:00:00 2001
From: Leon Krieg <info@madcow.dev>
Date: Mon, 26 Aug 2024 17:30:33 +0200
Subject: [PATCH] Move UART implementation to seperate module

---
 .Makefile.prev.swp | Bin 0 -> 12288 bytes
 src/common.c       |   1 +
 src/common.h       |   9 ++++++++
 src/main.c         |  50 ++++++++++-----------------------------------
 src/uart.c         |  47 ++++++++++++++++++++++++++++++++++++++++++
 src/uart.h         |   8 ++++++++
 6 files changed, 76 insertions(+), 39 deletions(-)
 create mode 100644 .Makefile.prev.swp
 create mode 100644 src/common.c
 create mode 100644 src/common.h
 create mode 100644 src/uart.c
 create mode 100644 src/uart.h

diff --git a/.Makefile.prev.swp b/.Makefile.prev.swp
new file mode 100644
index 0000000000000000000000000000000000000000..6d9baaddf8bbcebc8d2a156979fa1bd52150dead
GIT binary patch
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diff --git a/src/common.c b/src/common.c
new file mode 100644
index 0000000..6c8de42
--- /dev/null
+++ b/src/common.c
@@ -0,0 +1 @@
+void *TODO;
diff --git a/src/common.h b/src/common.h
new file mode 100644
index 0000000..3d70c03
--- /dev/null
+++ b/src/common.h
@@ -0,0 +1,9 @@
+#ifndef MAD_COMMON_H
+#define MAD_COMMON_H
+
+#define UNUSED(s) (void)(s)
+
+#include <util/delay.h>
+#define Sleep(ms) _delay_ms(ms)
+
+#endif // MAD_COMMON_H
diff --git a/src/main.c b/src/main.c
index 97a7dd6..8a139f6 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,50 +1,22 @@
-#include <avr/io.h>
-#include <util/delay.h>
-#include <stdlib.h>
+#include "common.h"
+#include "uart.h"
+
 #include <stdio.h>
 
-#define BAUD_PRESCALE (((F_CPU / (USART_BAUDRATE * 16UL))) - 1)
-
-void UART_Init(long USART_BAUDRATE)
-{
-	UCSRB |= (1 << RXEN) | (1 << TXEN);
-	UCSRC |= (1 << URSEL) | (1 << UCSZ0) | (1 << UCSZ1);
-	UBRRL = BAUD_PRESCALE;
-	UBRRH = (BAUD_PRESCALE >> 8);
-}
-
-unsigned char UART_RxChar()
-{
-	while ((UCSRA & (1 << RXC)) == 0);
-	return UDR;
-}
-
-void UART_TxChar(char ch)
-{
-	while ((UCSRA & (1 << UDRE)) == 0);
-	UDR = ch;
-}
-
-void UART_SendString(char *str)
-{
-	unsigned char j = 0;
-
-	while (str[j] != 0) {
-		UART_TxChar(str[j++]);
-	}
-}
-
 int main(void)
 {
-	char buf[64];
+	unsigned long i;
+	char buf[128];
 
-	UART_Init(9600);
+	UART_Init();
 
-	for (unsigned long i = 1;; i++) {
+	for (i = 1;; i++) {
 		if (i >= 99999) i = 1;
+
 		sprintf(buf, "[CORE] Fetching sensors #%05lu...\r\n", i);
-		UART_SendString(buf);
-		_delay_ms(3000);
+		UART_Write(buf);
+
+		Sleep(3000);
 	}
 
 	return 0;
diff --git a/src/uart.c b/src/uart.c
new file mode 100644
index 0000000..e2f4f38
--- /dev/null
+++ b/src/uart.c
@@ -0,0 +1,47 @@
+#include "common.h"
+#include <avr/io.h>
+
+#define BAUD_RATE 9600
+#define BAUD_PRESCALE (((F_CPU / (BAUD_RATE * 16UL))) - 1)
+
+static char UART_Rx(void);
+static void UART_Tx(char ch);
+
+void UART_Init(void)
+{
+        UCSRB |= (1 << RXEN) | (1 << TXEN);
+        UCSRC |= (1 << URSEL) | (1 << UCSZ0) | (1 << UCSZ1);
+        UBRRH = (BAUD_PRESCALE >> 8);
+        UBRRL = BAUD_PRESCALE;
+}
+
+void UART_Read(char **buf)
+{
+	// do {
+	//	p[n++] = UART_Rx();
+	// } while (p[n] != '\n');
+
+	UNUSED(UART_Rx);
+	UNUSED(buf);
+}
+
+void UART_Write(const char *buf)
+{
+	int n = 0;
+
+	while (buf[n] != '\0') {
+		UART_Tx(buf[n++]);
+	}
+}
+
+static char UART_Rx(void)
+{
+	while ((UCSRA & (1 << RXC)) == 0);
+	return UDR;
+}
+
+static void UART_Tx(char ch)
+{
+	while ((UCSRA & (1 << UDRE)) == 0);
+	UDR = ch;
+}
diff --git a/src/uart.h b/src/uart.h
new file mode 100644
index 0000000..ae85b9f
--- /dev/null
+++ b/src/uart.h
@@ -0,0 +1,8 @@
+#ifndef MAD_UART_H
+#define MAD_UART_H
+
+void UART_Init(void);
+void UART_Read(char **buf);
+void UART_Write(const char *buf);
+
+#endif // MAD_UART_H