Write example for working with shift register

Makefile

@@ -20,9 +20,9 @@ EXAMPLS = ./examples
 # Here u can use different examples which you can find in examples folder
 # Names what you can use:
 # 	- blink
-#
+#	- shift_register
 # --------------------------------------------------------------------------------------------------------------------
-OUTNAME = blink
+OUTNAME = shift_register
 
 OUTBIN = $(OUTPATH)/$(OUTNAME).bin
 OUTHEX = $(OUTPATH)/$(OUTNAME).hex

examples/shift_register.c

@@ -0,0 +1,26 @@
+#include "../lib/Mega2560.h"
+#include <util/delay.h>
+
+const uint8_t dataPin = 2;
+const uint8_t latchPin = 3;
+const uint8_t clockPin = 4;
+
+void setup() {
+    USART_Init(MYUBRR);
+    print("Started");
+
+    pinMode(dataPin, OUTPUT);
+    pinMode(latchPin, OUTPUT);
+    pinMode(clockPin, OUTPUT);
+}
+
+int main(void) {
+    setup();
+    while (1) {
+        turn(latchPin, OFF);
+        shiftOut(dataPin, clockPin, 0b01111111);
+        turn(latchPin, ON);
+        _delay_ms(1000);
+    }
+    return 1;
+}