Diff: main.cpp

Revision:

0:3114f82feb68

Child:

15:86c93f5d67c4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Jun 05 17:34:16 2018 +0100
@@ -0,0 +1,61 @@
+#include "mbed.h"
+
+#if !defined(MBED_CPU_STATS_ENABLED) || !defined(DEVICE_LPTICKER) || !defined(DEVICE_SLEEP)
+#error [NOT_SUPPORTED] test not supported
+#endif
+
+DigitalOut led1(LED1);
+
+#define MAX_THREAD_STACK        384
+#define SAMPLE_TIME             1000
+#define LOOP_TIME               3000
+
+uint64_t prev_idle_time = 0;
+int32_t wait_time = 5000;
+
+void busy_thread()
+{
+    volatile uint64_t i = ~0;
+
+    while(i--) {
+        led1 = !led1;
+        wait_us(wait_time);
+    }
+}
+
+void print_stats()
+{
+    mbed_stats_cpu_t stats;
+    mbed_stats_cpu_get(&stats);
+
+    printf("%-20lld", stats.uptime);
+    printf("%-20lld", stats.idle_time);
+    printf("%-20lld", stats.sleep_time);
+    printf("%-20lld\n", stats.deep_sleep_time);
+}
+
+int main()
+{
+    // Request the shared queue
+    EventQueue *stats_queue = mbed_event_queue();
+    Thread *thread;
+    int id;
+
+    id = stats_queue->call_every(SAMPLE_TIME, print_stats);
+    printf("%-20s%-20s%-20s%-20s\n", "Uptime", "Idle Time", "Sleep time", "DeepSleep time");
+
+    thread = new Thread(osPriorityNormal, MAX_THREAD_STACK);
+    thread->start(busy_thread);
+
+    // Steadily increase the system load
+    for (int count = 1; ; count++) {
+        Thread::wait(LOOP_TIME);
+        if (wait_time <= 0) {
+            break;
+        }
+        wait_time -= 1000;
+    }
+    thread->terminate();
+    stats_queue->cancel(id);
+    return 0;
+}