Diff: platform/mbed_wait_api_rtos.cpp

Revision:

0:85b3fd62ea1a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/platform/mbed_wait_api_rtos.cpp	Mon Mar 16 06:35:48 2020 +0000
@@ -0,0 +1,52 @@
+/* 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.
+ */
+
+// This implementation of the wait functions will be compiled only
+// if the RTOS is present.
+#ifdef MBED_CONF_RTOS_PRESENT
+
+#include "platform/mbed_wait_api.h"
+#include "hal/us_ticker_api.h"
+#include "rtos/rtos.h"
+#include "platform/mbed_critical.h"
+#include "platform/mbed_sleep.h"
+
+void wait(float s) {
+    wait_us(s * 1000000.0f);
+}
+
+void wait_ms(int ms) {
+    wait_us(ms * 1000);
+}
+
+void wait_us(int us) {
+    const ticker_data_t *const ticker = get_us_ticker_data();
+
+    uint32_t start = ticker_read(ticker);
+    // Use the RTOS to wait for millisecond delays if possible
+    int ms = us / 1000;
+    if ((ms > 0) && core_util_are_interrupts_enabled()) {
+        sleep_manager_lock_deep_sleep();
+        Thread::wait((uint32_t)ms);
+        sleep_manager_unlock_deep_sleep();
+    }
+    // Use busy waiting for sub-millisecond delays, or for the whole
+    // interval if interrupts are not enabled
+    while ((ticker_read(ticker) - start) < (uint32_t)us);
+}
+
+#endif // #if MBED_CONF_RTOS_PRESENT
+