working printf

sam3s_example/atmel_softpack_libraries/libboard_sam3s-ek/include/uart_console.h

@@ -33,6 +33,8 @@
 
 #include <stdint.h>
 
+extern int printf(const char *, ...);
+
 extern void UART_Configure( uint32_t dwBaudrate, uint32_t dwMasterClock ) ;
 extern void UART_PutChar( uint8_t uc ) ;
 extern uint32_t UART_GetChar( void ) ;

sam3s_example/atmel_softpack_libraries/libboard_sam3s-ek/source/uart_console.c

@@ -63,6 +63,32 @@
 /** Is Console Initialized. */
 static uint8_t _ucIsConsoleInitialized=0 ;
 
+extern void UART_PutString(const char *str, int len) {
+    int i;
+    for (i=0; i<len; i++) {
+        UART_PutChar(*str++);
+    }
+}
+
+extern int printf(const char *fmt, ...) 
+{
+    char *cmdp;
+    size_t ret = 0;
+
+    va_list va;
+    va_start(va, fmt);
+    ret = vasprintf(&cmdp, fmt, va);
+    va_end(va);
+
+    if (ret == strlen(cmdp)) {
+        UART_PutString(cmdp, strlen(cmdp));
+        free(cmdp);
+    } else {
+        return -1;
+    }
+    return ret;
+}
+
 /**
  * \brief Configures an USART peripheral with the specified parameters.
  *

sam3s_example/atmel_softpack_libraries/libchip_sam3s/include/trace.h

@@ -67,7 +67,7 @@
 /*
  *         Headers
  */
-
+#include "board.h"
 #include "pio.h"
 
 #include <stdio.h>