pulse consistency test using wait_us

Revision:
0:18409537564c
Child:
1:0f0c1a9a174a
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed_app.json	Sat Mar 30 06:37:35 2019 +0000
@@ -0,0 +1,15 @@
+{
+    "target_overrides": {
+        "*": {
+            "platform.stack-stats-enabled": true,
+            "platform.heap-stats-enabled": true,
+            "platform.cpu-stats-enabled": true,
+            "platform.thread-stats-enabled": true,
+            "platform.sys-stats-enabled": true
+        },
+        "NRF52_DK": {
+            "target.extra_labels_add": ["SOFTDEVICE_NONE"],
+            "target.extra_labels_remove": ["SOFTDEVICE_COMMON", "SOFTDEVICE_S132_FULL", "NORDIC_SOFTDEVICE", "NORDIC_CORDIO", "CORDIO", "CORDIO_LL"]
+        }        
+    }
+}