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mbed/hal/pwmout_api.h

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+
+/** \addtogroup hal */
+/** @{*/
+/* 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.
+ */
+#ifndef MBED_PWMOUT_API_H
+#define MBED_PWMOUT_API_H
+
+#include "device.h"
+
+#if DEVICE_PWMOUT
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Pwmout hal structure. pwmout_s is declared in the target's hal
+ */
+typedef struct pwmout_s pwmout_t;
+
+/**
+ * \defgroup hal_pwmout Pwmout hal functions
+ * @{
+ */
+
+/** Initialize the pwm out peripheral and configure the pin
+ *
+ * @param obj The pwmout object to initialize
+ * @param pin The pwmout pin to initialize
+ */
+void pwmout_init(pwmout_t *obj, PinName pin);
+
+/** Deinitialize the pwmout object
+ *
+ * @param obj The pwmout object
+ */
+void pwmout_free(pwmout_t *obj);
+
+/** Set the output duty-cycle in range <0.0f, 1.0f>
+ *
+ * Value 0.0f represents 0 percentage, 1.0f represents 100 percent.
+ * @param obj     The pwmout object
+ * @param percent The floating-point percentage number
+ */
+void pwmout_write(pwmout_t *obj, float percent);
+
+/** Read the current float-point output duty-cycle
+ *
+ * @param obj The pwmout object
+ * @return A floating-point output duty-cycle
+ */
+float pwmout_read(pwmout_t *obj);
+
+/** Set the PWM period specified in seconds, keeping the duty cycle the same
+ *
+ * Periods smaller than microseconds (the lowest resolution) are set to zero.
+ * @param obj     The pwmout object
+ * @param seconds The floating-point seconds period
+ */
+void pwmout_period(pwmout_t *obj, float seconds);
+
+/** Set the PWM period specified in miliseconds, keeping the duty cycle the same
+ *
+ * @param obj The pwmout object
+ * @param ms  The milisecond period
+ */
+void pwmout_period_ms(pwmout_t *obj, int ms);
+
+/** Set the PWM period specified in microseconds, keeping the duty cycle the same
+ *
+ * @param obj The pwmout object
+ * @param us  The microsecond period
+ */
+void pwmout_period_us(pwmout_t *obj, int us);
+
+/** Set the PWM pulsewidth specified in seconds, keeping the period the same.
+ *
+ * @param obj     The pwmout object
+ * @param seconds The floating-point pulsewidth in seconds
+ */
+void pwmout_pulsewidth(pwmout_t *obj, float seconds);
+
+/** Set the PWM pulsewidth specified in miliseconds, keeping the period the same.
+ *
+ * @param obj The pwmout object
+ * @param ms  The floating-point pulsewidth in miliseconds
+ */
+void pwmout_pulsewidth_ms(pwmout_t *obj, int ms);
+
+/** Set the PWM pulsewidth specified in microseconds, keeping the period the same.
+ *
+ * @param obj The pwmout object
+ * @param us  The floating-point pulsewidth in microseconds
+ */
+void pwmout_pulsewidth_us(pwmout_t *obj, int us);
+
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
+#endif
+
+/** @}*/