- added

git-svn-id: http://moon:8086/svn/projects/HendiControl@21 fda53097-d464-4ada-af97-ba876c37ca34
2019-02-20 20:01:04 +00:00
parent 21dacf4be6
commit a794460fdc
14 changed files with 446 additions and 0 deletions
@@ -0,0 +1,56 @@
+/*
+ * uart.c
+ *
+ * Created: 20.02.2019 20:50:13
+ *  Author: jens
+ */ 
+
+#include <avr/io.h>
+#include <stdio.h>
+#include "uart.h"
+
+void uart_init(uint16_t BAUD_PRESCALE)
+{
+	// Set baud rate
+	UBRR0L  = (uint8_t)BAUD_PRESCALE;
+	UBRR0H = (uint8_t)(BAUD_PRESCALE >> 8);
+	
+	// Enable receiver and transmitter
+	UCSR0B = (1<<TXEN0)|(1<<RXEN0);
+	
+	// Enable RX interrupt
+	UCSR0B |= (1<<RXCIE0);
+	
+}
+
+void uart_putc(char c)
+{
+	while((UCSR0A & (1<<UDRE0)) == 0)
+	{
+	}
+	UDR0 = c;
+}
+
+int uart_putchar(char c, FILE *stream)
+{
+	uart_putc(c);
+	if (c == 0x0A)
+	{
+		uart_putc(0x0D);
+	}
+	return 0;
+}
+
+void uart_puts(char const *str)
+{
+	while(*str)
+	{
+		char c = *(str++);
+		uart_putc(c);
+		if (c == 0x0A)
+		{
+			uart_putc(0x0D);
+		}
+	}
+}
+