AP_HAL_AVR: add Util stubs

libraries/AP_HAL_AVR/AP_HAL_AVR_Namespace.h

@@ -26,6 +26,7 @@ namespace AP_HAL_AVR {
     class AVRTimer;
     class AVRSemaphore;
     class ISRRegistry;
+    class AVRUtil;
 }
 
 #endif //__AP_HAL_AVR_NAMESPACE_H__

libraries/AP_HAL_AVR/AP_HAL_AVR_private.h

@@ -12,6 +12,7 @@
 #include "RCInput.h"
 #include "RCOutput.h"
 #include "Scheduler.h"
+#include "Util.h"
 #include "utility/ISRRegistry.h"
 
 #endif // __AP_HAL_AVR_PRIVATE_H__

libraries/AP_HAL_AVR/HAL_AVR_APM1_Class.cpp

@@ -30,6 +30,7 @@ static AVRGPIO          avrGPIO;
 static APM1RCInput      apm1RCInput;
 static APM1RCOutput     apm1RCOutput;
 static AVRScheduler     avrScheduler;
+static AVRUtil          avrUtil;
 
 static ISRRegistry isrRegistry;
 
@@ -47,7 +48,8 @@ HAL_AVR_APM1::HAL_AVR_APM1() :
         &avrGPIO,
         &apm1RCInput,
         &apm1RCOutput,
-        &avrScheduler )
+        &avrScheduler,
+        &avrUtil )
 {}
 
 void HAL_AVR_APM1::init(int argc, char * const argv[]) const {

libraries/AP_HAL_AVR/HAL_AVR_APM2_Class.cpp

@@ -30,6 +30,7 @@ static AVRGPIO          avrGPIO;
 static APM2RCInput      apm2RCInput;
 static APM2RCOutput     apm2RCOutput;
 static AVRScheduler     avrScheduler;
+static AVRUtil          avrUtil;
 
 static ISRRegistry isrRegistry;
 
@@ -46,7 +47,8 @@ HAL_AVR_APM2::HAL_AVR_APM2() :
         &avrGPIO,
         &apm2RCInput,
         &apm2RCOutput,
-        &avrScheduler )
+        &avrScheduler,
+        &avrUtil )
 {}
 
 void HAL_AVR_APM2::init(int argc, char * const argv[]) const {

libraries/AP_HAL_AVR/Scheduler.cpp

@@ -7,8 +7,8 @@
 #include <avr/wdt.h>
 #include <avr/interrupt.h>
 
-#include "HAL_AVR.h"
 #include "Scheduler.h"
+#include "ISRRegistry.h"
 using namespace AP_HAL_AVR;
 
 extern const AP_HAL::HAL& hal;

libraries/AP_HAL_AVR/Scheduler_Timer.cpp

@@ -4,7 +4,6 @@
 #include <avr/io.h>
 #include <avr/interrupt.h>
 
-#include "HAL_AVR.h"
 #include "Scheduler.h"
 using namespace AP_HAL_AVR;
 

libraries/AP_HAL_AVR/Util.cpp

@@ -0,0 +1,27 @@
+
+#include "Util.h"
+using namespace AP_HAL_AVR;
+
+int AVRUtil::snprintf(char* str, size_t size, const char *format, ...)
+{
+
+}
+
+int AVRUtil::snprintf_P(char* str, size_t size, const prog_char_t *format, ...)
+{
+
+}
+
+
+int AVRUtil::vsnprintf(char* str, size_t size, const char *format, va_list ap)
+{
+
+}
+
+int AVRUtil::vsnprintf_P(char* str, size_t size, const prog_char_t *format,
+            va_list ap)
+{
+
+}
+
+

libraries/AP_HAL_AVR/Util.h

@@ -0,0 +1,17 @@
+
+#ifndef __AP_HAL_AVR_UTIL_H__
+#define __AP_HAL_AVR_UTIL_H__
+
+#include <AP_HAL.h>
+#include "AP_HAL_AVR_Namespace.h"
+
+class AP_HAL_AVR::AVRUtil : public AP_HAL::Util {
+public:
+    int snprintf(char* str, size_t size, const char *format, ...);
+    int snprintf_P(char* str, size_t size, const prog_char_t *format, ...);
+    int vsnprintf(char* str, size_t size, const char *format, va_list ap);
+    int vsnprintf_P(char* str, size_t size, const prog_char_t *format,
+            va_list ap);
+};
+
+#endif // __AP_HAL_AVR_UTIL_H__