tests: Add simple ets_timers test

tests/ets_timers/timers.c

@@ -0,0 +1,53 @@
+#include <stdlib.h>
+#include <string.h>
+#include "FreeRTOS.h"
+#include "task.h"
+#include "etstimer.h"
+
+#include "test/test.h"
+
+static ETSTimer test_timer_0;
+
+static int timer_0_counter = 0;
+
+static uint32_t test_start_time;
+
+
+static uint32_t get_current_time()
+{
+     return timer_get_count(FRC2) / 5000;  // to get roughly 1ms resolution
+}
+
+static void timer_0_cb(void *arg)
+{
+    uint32_t v = (uint32_t)arg;
+    uint32_t delay = get_current_time() - test_start_time;
+
+    TEST_CHECK(v == 0xAA, "Timer 0 argument invalid");
+    TEST_CHECK(timer_0_counter == 0, "Timer 0 repeat error");
+
+    // Timer should fire in 100ms
+    TEST_CHECK(delay > 80, "Timer 0 time wrong");
+    TEST_CHECK(delay < 120, "Timer 0 time wrong");
+
+    timer_0_counter++;
+}
+
+void test_task(void *pvParameters)
+{
+    test_start_time = get_current_time();
+
+    sdk_ets_timer_disarm(&test_timer_0);
+    sdk_ets_timer_setfn(&test_timer_0, timer_0_cb, (void*)0xAA);
+    sdk_ets_timer_arm(&test_timer_0, 100, false);
+
+    // Finish the test and report the result
+    TEST_FINISH();
+}
+
+void user_init(void)
+{
+    TEST_INIT(10);   // 10 seconds timeout
+
+    xTaskCreate(test_task, (signed char *)"test_task", 256, NULL, 2, NULL);
+}