From de57772e2027729e76482a2771d60f444a975036 Mon Sep 17 00:00:00 2001
From: Jonas Gunz <himself@jonasgunz.de>
Date: Tue, 2 May 2017 21:15:14 +0200
Subject: added UART Library

---
 .vs/floppyMusic/v14/.atsuo    | Bin 34304 -> 34816 bytes
 floppyMusic/floppy.c          |   6 ++----
 floppyMusic/floppy.h          |   6 +++++-
 floppyMusic/floppyMusic.cproj |   6 ++++++
 floppyMusic/main.c            |  14 +++++++++++---
 floppyMusic/uart.c            |  40 ++++++++++++++++++++++++++++++++++++++++
 floppyMusic/uart.h            |  28 ++++++++++++++++++++++++++++
 7 files changed, 92 insertions(+), 8 deletions(-)
 create mode 100644 floppyMusic/uart.c
 create mode 100644 floppyMusic/uart.h

diff --git a/.vs/floppyMusic/v14/.atsuo b/.vs/floppyMusic/v14/.atsuo
index 706c20b..eab8b25 100644
Binary files a/.vs/floppyMusic/v14/.atsuo and b/.vs/floppyMusic/v14/.atsuo differ
diff --git a/floppyMusic/floppy.c b/floppyMusic/floppy.c
index 716502a..e4eff05 100644
--- a/floppyMusic/floppy.c
+++ b/floppyMusic/floppy.c
@@ -17,7 +17,7 @@ ISR(TIMER0_OVF_vect)
 
 	for(uint8_t i = 0; i < 8; i++)
 	{
-		if(floppy_nextrun[i] == (timer_overflow_counter + 1)) //Do Stuff. Doesnt work
+		if(floppy_nextrun[i] == (timer_overflow_counter + 1))
 		{
 			floppy_nextrun[i] += floppy_frequencies[i];
 			floppy_pulse(i);
@@ -40,8 +40,6 @@ void floppy_setup(char *_pulse_port, char *_pulse_ddr, char *_direction_port, ch
 	*dDDR	= 0xff;
 	*dPORT	= 0xff;
 	
-	
-
 	//Variable init
 	timer_overflow_counter = 0;
 
@@ -63,7 +61,7 @@ void floppy_setup(char *_pulse_port, char *_pulse_ddr, char *_direction_port, ch
 	*fPORT	= 0xff;
 
 	//Setup Timer
-	TCCR0	|= (1 << CS01); // Prescaler 8, for max Frequency of 488 Hertz for F_CPU = 1MHz
+	TCCR0	|= (1 << CS01); // Prescaler 8 To leave enough time for ISR to complete
 	TIMSK	|= (1 << TOIE0); //Activate Interrupt
 	sei();
  }
diff --git a/floppyMusic/floppy.h b/floppyMusic/floppy.h
index 280bb2f..76ad123 100644
--- a/floppyMusic/floppy.h
+++ b/floppyMusic/floppy.h
@@ -9,9 +9,13 @@
 #ifndef FLOPPY_H_
 #define FLOPPY_H_
 
+#ifndef F_CPU
+#define F_CPU 16000000UL
+#endif
+
 #include <avr/io.h>
 #include <avr/interrupt.h>
-#include <avr/delay.h>
+#include <util/delay.h>
 
 uint8_t timer_overflow_counter;
 uint8_t floppy_frequencies[8];
diff --git a/floppyMusic/floppyMusic.cproj b/floppyMusic/floppyMusic.cproj
index 71fa9a4..9910c79 100644
--- a/floppyMusic/floppyMusic.cproj
+++ b/floppyMusic/floppyMusic.cproj
@@ -168,6 +168,12 @@
     <Compile Include="main.c">
       <SubType>compile</SubType>
     </Compile>
+    <Compile Include="uart.c">
+      <SubType>compile</SubType>
+    </Compile>
+    <Compile Include="uart.h">
+      <SubType>compile</SubType>
+    </Compile>
   </ItemGroup>
   <Import Project="$(AVRSTUDIO_EXE_PATH)\\Vs\\Compiler.targets" />
 </Project>
\ No newline at end of file
diff --git a/floppyMusic/main.c b/floppyMusic/main.c
index 9743636..c0db582 100644
--- a/floppyMusic/main.c
+++ b/floppyMusic/main.c
@@ -5,18 +5,26 @@
  * Author : Jonas
  */ 
 
+ #ifndef F_CPU
+ #define F_CPU 16000000UL //CPU Running at 16MHz
+ #endif
+
 #include <avr/io.h>
 
 #include "floppy.h"
+#include "uart.h"
 
 int main(void)
 {
+	uart_init(9600);
+
 	floppy_setup(&PORTC, &DDRC, &PORTD, &DDRD);
 	floppy_set_frequency(0, 4);
 
+	uart_send_string("Floppy Music\n");
+
     while (1) 
     {
-		
+		floppy_set_frequency(0, uart_recieve());
     }
-}
-
+}
\ No newline at end of file
diff --git a/floppyMusic/uart.c b/floppyMusic/uart.c
new file mode 100644
index 0000000..d4d5ccf
--- /dev/null
+++ b/floppyMusic/uart.c
@@ -0,0 +1,40 @@
+/*
+ * uart.c
+ *
+ * Created: 02.05.2017 20:48:26
+ *  Author: Jonas
+ */ 
+
+ #include "uart.h"
+
+ void uart_init(uint32_t _baud)
+ {
+	unsigned int ubrr = _GET_UBBR(_baud);
+
+	UBRRH = (ubrr<<8);
+	UBRRL = ubrr;
+ }
+
+ void uart_send(char _data)
+ {
+	while(!(UCSRA & (1<<UDRE)));
+	UDR = _data;
+ }
+
+ void uart_send_string(char *_data)
+ {
+	char *data = _data;
+
+	while(*data != '\0')
+	{
+		uart_send(*data);
+		data++;
+	}
+ }
+
+ char uart_recieve()
+ {
+	while(!(UCSRA & (1<<RXC)));
+
+	return UDR;
+ }
\ No newline at end of file
diff --git a/floppyMusic/uart.h b/floppyMusic/uart.h
new file mode 100644
index 0000000..4943af9
--- /dev/null
+++ b/floppyMusic/uart.h
@@ -0,0 +1,28 @@
+/*
+ * uart.h
+ *
+ * Created: 02.05.2017 20:48:16
+ *  Author: Jonas
+ */ 
+
+
+#ifndef UART_H_
+#define UART_H_
+
+#ifndef F_CPU
+#define F_CPU 16000000UL //CPU Running at 16MHz
+#endif
+
+#include <avr/io.h>
+
+#define _GET_UBBR(BAUD) ( (F_CPU / 16 * BAUD) - 1)
+
+void uart_init(uint32_t _baud);
+
+void uart_send(char _data);
+
+void uart_send_string(char *_data);
+
+char uart_recieve(void);
+
+#endif /* UART_H_ */
\ No newline at end of file
-- 
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