Started following some tutorial on att85 usi. Downloaded example code from make avr book.

Make AVR Examples/Chapter11_Driving-Servo-Motors/servoSundial/_servoSerialHelpers.c

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+              /* Functions for serial port output formatting and input */
+#include "_servoSerialHelpers.h"
+
+void printTime(uint8_t hours, uint8_t minutes, uint8_t seconds) {
+  printByte(hours);
+  transmitByte(':');
+  printByte(minutes);
+  transmitByte(':');
+  printByte(seconds);
+  transmitByte('\r');
+  transmitByte('\n');
+}
+
+void pollSerial(void) {
+                          /* Poll for serial input -- to set the time. */
+  char input;
+  if (bit_is_set(UCSR0A, RXC0)) {
+    input = UDR0;
+    if (input == 'S') {                         /* enter set-time mode */
+      printString("Setting time...\r\n");
+      printString("Hour: ");
+      hours = getNumber();
+      printString("\r\nMinutes: ");
+      minutes = getNumber();
+      printString("\r\nSeconds: ");
+      seconds = getNumber();
+      printString("\r\n");
+      ticks = 0;
+      if ((hours >= START_TIME) && (hours < STOP_TIME)) {
+        setServoPosition();
+      }
+    }
+  }
+}