Add sleep manager API

TESTS/mbed_hal/sleep_manager/main.cpp

@@ -0,0 +1,60 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2017 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 "utest/utest.h"
+#include "unity/unity.h"
+#include "greentea-client/test_env.h"
+
+#if !DEVICE_SLEEP
+#error [NOT_SUPPORTED] test not supported
+#endif
+
+using namespace utest::v1;
+
+void sleep_manager_deepsleep_counter_test()
+{
+    bool deep_sleep_allowed = sleep_manager_can_deep_sleep();
+    TEST_ASSERT_TRUE(deep_sleep_allowed);
+
+    sleep_manager_lock_deep_sleep();
+    deep_sleep_allowed = sleep_manager_can_deep_sleep();
+    TEST_ASSERT_FALSE(deep_sleep_allowed);
+
+    sleep_manager_unlock_deep_sleep();
+    deep_sleep_allowed = sleep_manager_can_deep_sleep();
+    TEST_ASSERT_TRUE(deep_sleep_allowed);
+}
+
+utest::v1::status_t greentea_failure_handler(const Case *const source, const failure_t reason) 
+{
+    greentea_case_failure_abort_handler(source, reason);
+    return STATUS_CONTINUE;
+}
+
+utest::v1::status_t greentea_test_setup(const size_t number_of_cases) 
+{
+    GREENTEA_SETUP(20, "default_auto");
+    return greentea_test_setup_handler(number_of_cases);
+}
+
+Case cases[] = {
+    Case("sleep manager -  deep sleep counter", sleep_manager_deepsleep_counter_test, greentea_failure_handler),
+};
+
+Specification specification(greentea_test_setup, cases, greentea_test_teardown_handler);
+
+int main() {
+    Harness::run(specification);
+}

TESTS/mbed_hal/sleep_manager_racecondition/main.cpp

@@ -0,0 +1,99 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2017 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 "utest/utest.h"
+#include "unity/unity.h"
+#include "greentea-client/test_env.h"
+
+#if !DEVICE_SLEEP
+#error [NOT_SUPPORTED] test not supported
+#endif
+
+using namespace utest::v1;
+
+void sleep_manager_locking_thread_test()
+{
+    for (uint32_t i = 0; i < 100; i++) {
+        sleep_manager_lock_deep_sleep();
+        Thread::wait(25);
+        sleep_manager_unlock_deep_sleep();
+    }
+}
+
+void sleep_manager_multithread_test()
+{
+    {
+        Callback<void()> cb(sleep_manager_locking_thread_test);
+        Thread t1;
+        Thread t2;
+
+        t1.start(callback(cb));
+        Thread::wait(25);
+        t2.start(callback(cb));
+
+        // Wait for the threads to finish
+        t1.join();
+        t2.join();
+    }
+
+    bool deep_sleep_allowed = sleep_manager_can_deep_sleep();
+    TEST_ASSERT_TRUE_MESSAGE(deep_sleep_allowed, "Deep sleep should be allowed");
+}
+
+void sleep_manager_locking_irq_test()
+{
+    sleep_manager_lock_deep_sleep();
+    sleep_manager_unlock_deep_sleep();
+}
+
+void sleep_manager_irq_test()
+{
+    {
+        Ticker ticker1;
+        Timer timer;
+
+        ticker1.attach_us(&sleep_manager_locking_irq_test, 500);
+
+        // run this for 5 seconds
+        timer.start();
+        int start = timer.read();
+        int end = start + 5;
+        while (timer.read() < end) {
+            sleep_manager_locking_irq_test();
+        }
+        timer.stop();
+    }
+
+    bool deep_sleep_allowed = sleep_manager_can_deep_sleep();
+    TEST_ASSERT_TRUE_MESSAGE(deep_sleep_allowed, "Deep sleep should be allowed");
+}
+
+utest::v1::status_t greentea_test_setup(const size_t number_of_cases) 
+{
+    GREENTEA_SETUP(30, "default_auto");
+    return greentea_test_setup_handler(number_of_cases);
+}
+
+Case cases[] = {
+    Case("sleep manager HAL - locking multithreaded", sleep_manager_multithread_test),
+    Case("sleep manager HAL - locking IRQ", sleep_manager_irq_test),
+};
+
+Specification specification(greentea_test_setup, cases, greentea_test_teardown_handler);
+
+int main() {
+    Harness::run(specification);
+}

drivers/CAN.cpp

@@ -18,16 +18,15 @@
 #if DEVICE_CAN
 
 #include "cmsis.h"
+#include "platform/mbed_sleep.h"
 
 namespace mbed {
 
-static void donothing() {}
-
 CAN::CAN(PinName rd, PinName td) : _can(), _irq() {
     // No lock needed in constructor
 
     for (size_t i = 0; i < sizeof _irq / sizeof _irq[0]; i++) {
-        _irq[i] = callback(donothing);
+        _irq[i] = NULL;
     }
 
     can_init(&_can, rd, td);
@@ -38,7 +37,7 @@ CAN::CAN(PinName rd, PinName td, int hz) : _can(), _irq() {
     // No lock needed in constructor
 
     for (size_t i = 0; i < sizeof _irq / sizeof _irq[0]; i++) {
-        _irq[i] = callback(donothing);
+        _irq[i] = NULL;
     }
 
     can_init_freq(&_can, rd, td, hz);
@@ -115,18 +114,28 @@ int CAN::filter(unsigned int id, unsigned int mask, CANFormat format, int handle
 void CAN::attach(Callback<void()> func, IrqType type) {
     lock();
     if (func) {
+        // lock deep sleep only the first time
+        if (!_irq[(CanIrqType)type]) {
+            sleep_manager_lock_deep_sleep();
+        }
         _irq[(CanIrqType)type] = func;
         can_irq_set(&_can, (CanIrqType)type, 1);
     } else {
-        _irq[(CanIrqType)type] = callback(donothing);
+        // unlock deep sleep only the first time
+        if (_irq[(CanIrqType)type]) {
+            sleep_manager_unlock_deep_sleep();
+        }
+        _irq[(CanIrqType)type] = NULL;
         can_irq_set(&_can, (CanIrqType)type, 0);
     }
     unlock();
 }
 
 void CAN::_irq_handler(uint32_t id, CanIrqType type) {
     CAN *handler = (CAN*)id;
-    handler->_irq[type].call();
+    if (handler->_irq[type]) {
+        handler->_irq[type].call();
+    }
 }
 
 void CAN::lock() {

drivers/CAN.h

@@ -235,7 +235,9 @@ class CAN : private NonCopyable<CAN> {
 
     /** Attach a function to call whenever a CAN frame received interrupt is
      *  generated.
-     *
+     *  
+     *  This function locks the deep sleep while a callback is attached
+     *  
      *  @param func A pointer to a void function, or 0 to set as none
      *  @param type Which CAN interrupt to attach the member function to (CAN::RxIrq for message received, CAN::TxIrq for transmitted or aborted, CAN::EwIrq for error warning, CAN::DoIrq for data overrun, CAN::WuIrq for wake-up, CAN::EpIrq for error passive, CAN::AlIrq for arbitration lost, CAN::BeIrq for bus error)
      */

drivers/I2C.cpp

@@ -17,6 +17,10 @@
 
 #if DEVICE_I2C
 
+#if DEVICE_I2C_ASYNCH
+#include "platform/mbed_sleep.h"
+#endif
+
 namespace mbed {
 
 I2C *I2C::_owner = NULL;
@@ -129,6 +133,7 @@ int I2C::transfer(int address, const char *tx_buffer, int tx_length, char *rx_bu
         unlock();
         return -1; // transaction ongoing
     }
+    sleep_manager_lock_deep_sleep();
     aquire();
 
     _callback = callback;
@@ -143,6 +148,7 @@ void I2C::abort_transfer(void)
 {
     lock();
     i2c_abort_asynch(&_i2c);
+    sleep_manager_unlock_deep_sleep();
     unlock();
 }
 
@@ -152,6 +158,9 @@ void I2C::irq_handler_asynch(void)
     if (_callback && event) {
         _callback.call(event);
     }
+    if (event) {
+        sleep_manager_unlock_deep_sleep();
+    }
 
 }
 

drivers/I2C.h

@@ -159,6 +159,8 @@ class I2C : private NonCopyable<I2C> {
 
     /** Start non-blocking I2C transfer.
      *
+     * This function locks the deep sleep until any event has occured
+     * 
      * @param address   8/10 bit I2c slave address
      * @param tx_buffer The TX buffer with data to be transfered
      * @param tx_length The length of TX buffer in bytes

drivers/SPI.cpp

@@ -16,6 +16,10 @@
 #include "drivers/SPI.h"
 #include "platform/mbed_critical.h"
 
+#if DEVICE_SPI_ASYNCH
+#include "platform/mbed_sleep.h"
+#endif
+
 #if DEVICE_SPI
 
 namespace mbed {
@@ -136,6 +140,7 @@ int SPI::transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_
 void SPI::abort_transfer()
 {
     spi_abort_asynch(&_spi);
+    sleep_manager_unlock_deep_sleep();
 #if TRANSACTION_QUEUE_SIZE_SPI
     dequeue_transaction();
 #endif
@@ -195,6 +200,7 @@ int SPI::queue_transfer(const void *tx_buffer, int tx_length, void *rx_buffer, i
 
 void SPI::start_transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t& callback, int event)
 {
+    sleep_manager_lock_deep_sleep();
     _acquire();
     _callback = callback;
     _irq.callback(&SPI::irq_handler_asynch);
@@ -224,6 +230,7 @@ void SPI::irq_handler_asynch(void)
 {
     int event = spi_irq_handler_asynch(&_spi);
     if (_callback && (event & SPI_EVENT_ALL)) {
+        sleep_manager_unlock_deep_sleep();
         _callback.call(event & SPI_EVENT_ALL);
     }
 #if TRANSACTION_QUEUE_SIZE_SPI

drivers/SPI.h

@@ -156,6 +156,8 @@ class SPI : private NonCopyable<SPI> {
 
     /** Start non-blocking SPI transfer using 8bit buffers.
      *
+     * This function locks the deep sleep until any event has occured
+     * 
      * @param tx_buffer The TX buffer with data to be transfered. If NULL is passed,
      *                  the default SPI value is sent
      * @param tx_length The length of TX buffer in bytes