tests-mbed_hal-sleep_manager: fix counter wraparound handling

There is a mismatch while handling counter wraparound in `test_sleep_auto` test case.
In the test timestamps in ticks are first converted to us and then while counting the time difference wraparound is handled (us and ticks fields are mismatched). The ticker wraparound case must be handled in the field of ticks, and then the difference converted to us.

Author: mprse

TESTS/mbed_hal/sleep_manager/main.cpp

@@ -141,7 +141,7 @@ void test_sleep_auto()
     const ticker_info_t *lp_ticker_info = get_lp_ticker_data()->interface->get_info();
     const unsigned lp_ticker_mask = ((1 << lp_ticker_info->bits) - 1);
     const ticker_irq_handler_type lp_ticker_irq_handler_org = set_lp_ticker_irq_handler(lp_ticker_isr);
-    us_timestamp_t us_ts1, us_ts2, lp_ts1, lp_ts2, us_diff1, us_diff2, lp_diff1, lp_diff2;
+    uint32_t us_ts1, us_ts2, lp_ts1, lp_ts2, us_diff1, us_diff2, lp_diff1, lp_diff2;
 
     /*  Let's avoid the Lp ticker wrap-around case */
     wraparound_lp_protect();
@@ -155,14 +155,16 @@ void test_sleep_auto()
 
     sleep_manager_lock_deep_sleep();
 
-    us_ts1 = ticks_to_us(us_ticker_read(), us_ticker_info->frequency);
-    lp_ts1 = ticks_to_us(lp_ticker_read(), lp_ticker_info->frequency);
+    us_ts1 = us_ticker_read();
+    lp_ts1 = lp_ticker_read();
 
     sleep_manager_sleep_auto();
-    us_ts2 = ticks_to_us(us_ticker_read(), us_ticker_info->frequency);
-    us_diff1 = (us_ts1 <= us_ts2) ? (us_ts2 - us_ts1) : (us_ticker_mask - us_ts1 + us_ts2 + 1);
-    lp_ts2 = ticks_to_us(lp_ticker_read(), lp_ticker_info->frequency);
-    lp_diff1 = (lp_ts1 <= lp_ts2) ? (lp_ts2 - lp_ts1) : (lp_ticker_mask - lp_ts1 + lp_ts2 + 1);
+
+    us_ts2 = us_ticker_read();
+    lp_ts2 = lp_ticker_read();
+
+    us_diff1 = ticks_to_us((us_ts1 <= us_ts2) ? (us_ts2 - us_ts1) : (us_ticker_mask - us_ts1 + us_ts2 + 1), us_ticker_info->frequency);
+    lp_diff1 = ticks_to_us((lp_ts1 <= lp_ts2) ? (lp_ts2 - lp_ts1) : (lp_ticker_mask - lp_ts1 + lp_ts2 + 1), lp_ticker_info->frequency);
 
     // Deep sleep locked -- ordinary sleep mode used:
     // * us_ticker powered ON,
@@ -190,15 +192,16 @@ void test_sleep_auto()
      * set and forbid deep_sleep during that period. Let this period pass  */
     TEST_ASSERT_TRUE(sleep_manager_can_deep_sleep_test_check());
 
-    us_ts1 = ticks_to_us(us_ticker_read(), us_ticker_info->frequency);
-    lp_ts1 = ticks_to_us(lp_ticker_read(), lp_ticker_info->frequency);
+    us_ts1 = us_ticker_read();
+    lp_ts1 = lp_ticker_read();
 
     sleep_manager_sleep_auto();
 
-    us_ts2 = ticks_to_us(us_ticker_read(), us_ticker_info->frequency);
-    us_diff2 = (us_ts1 <= us_ts2) ? (us_ts2 - us_ts1) : (us_ticker_mask - us_ts1 + us_ts2 + 1);
-    lp_ts2 = ticks_to_us(lp_ticker_read(), lp_ticker_info->frequency);
-    lp_diff2 = (lp_ts1 <= lp_ts2) ? (lp_ts2 - lp_ts1) : (lp_ticker_mask - lp_ts1 + lp_ts2 + 1);
+    us_ts2 = us_ticker_read();
+    lp_ts2 = lp_ticker_read();
+
+    us_diff2 = ticks_to_us((us_ts1 <= us_ts2) ? (us_ts2 - us_ts1) : (us_ticker_mask - us_ts1 + us_ts2 + 1), us_ticker_info->frequency);
+    lp_diff2 = ticks_to_us((lp_ts1 <= lp_ts2) ? (lp_ts2 - lp_ts1) : (lp_ticker_mask - lp_ts1 + lp_ts2 + 1), lp_ticker_info->frequency);
 
     // Deep sleep unlocked -- deep sleep mode used:
     // * us_ticker powered OFF,