--- /dev/null
+#include "mbed.h"
+#include "test_env.h"
+
+#define TXPIN USBTX
+#define RXPIN USBRX
+
+
+namespace {
+ const int BUFFER_SIZE = 48;
+ char buffer[BUFFER_SIZE] = {0};
+}
+
+int main() {
+ MBED_HOSTTEST_TIMEOUT(20);
+ MBED_HOSTTEST_SELECT(echo);
+ MBED_HOSTTEST_DESCRIPTION(Serial Echo at 115200);
+ MBED_HOSTTEST_START("MBED_A9");
+
+ Serial pc(TXPIN, RXPIN);
+ pc.baud(115200);
+
+ while (1) {
+ pc.gets(buffer, BUFFER_SIZE - 1);
+ pc.printf("%s", buffer);
+ }
+}