Diff: OldTimer.cpp

Revision:

9:5c195c1036da

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OldTimer.cpp	Wed Sep 06 05:58:26 2017 +0000
@@ -0,0 +1,85 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "OldTimer.h"
+#include "hal/ticker_api.h"
+#include "hal/us_ticker_api.h"
+#include "platform/mbed_critical.h"
+
+
+OldTimer::OldTimer() : _running(), _start(), _time(), _ticker_data(get_us_ticker_data()) {
+    reset();
+}
+
+OldTimer::OldTimer(const ticker_data_t *data) : _running(), _start(), _time(), _ticker_data(data) {
+    reset();
+}
+
+void OldTimer::start() {
+    core_util_critical_section_enter();
+    if (!_running) {
+        _start = ticker_read_us(_ticker_data);
+        _running = 1;
+    }
+    core_util_critical_section_exit();
+}
+
+void OldTimer::stop() {
+    core_util_critical_section_enter();
+    _time += slicetime();
+    _running = 0;
+    core_util_critical_section_exit();
+}
+
+int OldTimer::read_us() {
+    return read_high_resolution_us();
+}
+
+float OldTimer::read() {
+    return (float)read_us() / 1000000.0f;
+}
+
+int OldTimer::read_ms() {
+    return read_high_resolution_us() / 1000;
+}
+
+us_timestamp_t OldTimer::read_high_resolution_us() {
+    core_util_critical_section_enter();
+    us_timestamp_t time = _time + slicetime();
+    core_util_critical_section_exit();
+    return time;
+}
+
+us_timestamp_t OldTimer::slicetime() {
+    us_timestamp_t ret = 0;
+    core_util_critical_section_enter();
+    if (_running) {
+        ret = ticker_read_us(_ticker_data) - _start;
+    }
+    core_util_critical_section_exit();
+    return ret;
+}
+
+void OldTimer::reset() {
+    core_util_critical_section_enter();
+    _start = ticker_read_us(_ticker_data);
+    _time = 0;
+    core_util_critical_section_exit();
+}
+
+OldTimer::operator float() {
+    return read();
+}
+