Merge pull request #34 from 0xc0170/fix_logging_interrupt_safety

Fix logging interrupt safety

Author: 0xc0170

TESTS/API/InterruptIn/InterruptIn.cpp

@@ -33,6 +33,7 @@ volatile bool result = false;
 void cbfn(void)
 {
     result = true;
+    DEBUG_PRINTF("\t**** Interrupt Triggered!\n");
 }
 
 // Template to check Falling edge and Rising edge interrupts.

ci_test_config.h

@@ -16,8 +16,10 @@
 #ifndef CI_TEST_CONFIG_H
 #define CI_TEST_CONFIG_H
 
+#include "utest_serial.h"
+
 #if defined(MBED_CONF_APP_DEBUG_MSG) && (MBED_CONF_APP_DEBUG_MSG != 0)
-#define DEBUG_PRINTF(...) do { printf(__VA_ARGS__); } while(0)
+#define DEBUG_PRINTF(...) do { utest_printf(__VA_ARGS__); } while(0)
 #else
 #define DEBUG_PRINTF(...) {}
 #endif