Diff: drivers/source/PwmOut.cpp

Revision:

1:9db0e321a9f4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/drivers/source/PwmOut.cpp	Tue Dec 31 06:02:27 2019 +0000
@@ -0,0 +1,171 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2019 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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 "drivers/PwmOut.h"
+
+
+#if DEVICE_PWMOUT
+
+#include "platform/mbed_critical.h"
+#include "platform/mbed_power_mgmt.h"
+#include "platform/mbed_assert.h"
+
+namespace mbed {
+
+PwmOut::PwmOut(PinName pin) :
+    _pin(pin),
+    _deep_sleep_locked(false),
+    _initialized(false),
+    _duty_cycle(0)
+{
+    PwmOut::init();
+}
+
+PwmOut::PwmOut(const PinMap &pinmap) : _deep_sleep_locked(false)
+{
+    core_util_critical_section_enter();
+    pwmout_init_direct(&_pwm, &pinmap);
+    core_util_critical_section_exit();
+}
+
+PwmOut::~PwmOut()
+{
+    PwmOut::deinit();
+}
+
+void PwmOut::write(float value)
+{
+    core_util_critical_section_enter();
+    pwmout_write(&_pwm, value);
+    core_util_critical_section_exit();
+}
+
+float PwmOut::read()
+{
+    core_util_critical_section_enter();
+    float val = pwmout_read(&_pwm);
+    core_util_critical_section_exit();
+    return val;
+}
+
+void PwmOut::period(float seconds)
+{
+    core_util_critical_section_enter();
+    pwmout_period(&_pwm, seconds);
+    core_util_critical_section_exit();
+}
+
+void PwmOut::period_ms(int ms)
+{
+    core_util_critical_section_enter();
+    pwmout_period_ms(&_pwm, ms);
+    core_util_critical_section_exit();
+}
+
+void PwmOut::period_us(int us)
+{
+    core_util_critical_section_enter();
+    pwmout_period_us(&_pwm, us);
+    core_util_critical_section_exit();
+}
+
+void PwmOut::pulsewidth(float seconds)
+{
+    core_util_critical_section_enter();
+    pwmout_pulsewidth(&_pwm, seconds);
+    core_util_critical_section_exit();
+}
+
+void PwmOut::pulsewidth_ms(int ms)
+{
+    core_util_critical_section_enter();
+    pwmout_pulsewidth_ms(&_pwm, ms);
+    core_util_critical_section_exit();
+}
+
+void PwmOut::pulsewidth_us(int us)
+{
+    core_util_critical_section_enter();
+    pwmout_pulsewidth_us(&_pwm, us);
+    core_util_critical_section_exit();
+}
+
+void PwmOut::suspend()
+{
+    core_util_critical_section_enter();
+    if (_initialized) {
+        _duty_cycle = PwmOut::read();
+        PwmOut::deinit();
+    }
+    core_util_critical_section_exit();
+}
+
+void PwmOut::resume()
+{
+    core_util_critical_section_enter();
+    if (!_initialized) {
+        PwmOut::init();
+        PwmOut::write(_duty_cycle);
+    }
+    core_util_critical_section_exit();
+}
+
+void PwmOut::lock_deep_sleep()
+{
+    if (_deep_sleep_locked == false) {
+        sleep_manager_lock_deep_sleep();
+        _deep_sleep_locked = true;
+    }
+}
+
+void PwmOut::unlock_deep_sleep()
+{
+    if (_deep_sleep_locked == true) {
+        sleep_manager_unlock_deep_sleep();
+        _deep_sleep_locked = false;
+    }
+}
+
+void PwmOut::init()
+{
+    core_util_critical_section_enter();
+
+    if (!_initialized) {
+        pwmout_init(&_pwm, _pin);
+        lock_deep_sleep();
+        _initialized = true;
+    }
+
+    core_util_critical_section_exit();
+}
+
+void PwmOut::deinit()
+{
+    core_util_critical_section_enter();
+
+    if (_initialized) {
+        pwmout_free(&_pwm);
+        unlock_deep_sleep();
+        _initialized = false;
+    }
+
+    core_util_critical_section_exit();
+}
+
+} // namespace mbed
+
+#endif // #if DEVICE_PWMOUT