Defined a local printf function to help in the simulator. Not working yet.

communications/include/serial_console.h

@@ -9,6 +9,7 @@ extern "C" {
 #include <avr/interrupt.h>
 
 void serial_console_init(uint32_t baudrate);
+int printf(const char *fmt, ...);
 
 #ifdef __cplusplus
 }

communications/src/serial_console.c

 #include "comm_cfg.h"
 #include "serial_console.h"
 #include <stdio.h>
+#include <stdarg.h>
 
 /* private variables */
 volatile uint8_t serial_console_rx_buffer[SERIAL_CONSOLE_MAX_BUFFER_LEN];
@@ -138,3 +139,14 @@ void serial_console_init(uint32_t baudrate)
   serial_console_set_baudrate(baudrate);
   device=fdevopen(serial_console_putchar,serial_console_getchar);
 }
+
+int printf(const char *fmt, ...)
+{
+  va_list ap;
+  int i;
+
+  va_start(ap,fmt);
+  i = vfprintf(stdout, fmt, ap);
+  va_end(ap);
+  return i;
+}

examples/pan_tilt/pan_tilt.c

 #include <util/delay.h>
-#include <stdio.h>
 #include "cm510.h"
 #include "balance.h"
 #include "exp_board.h"
@@ -36,6 +35,7 @@ void user_loop(void)
                        }
                        else
                          state=wait_start;
+                       printf("wait_start %d\n",(int)state);
                        break;
       case wait_cmd: if(is_button_rising_edge(BTN_LEFT))
                      {