121 lines
4.3 KiB
C
121 lines
4.3 KiB
C
/****************************************************************************
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* arch/arm/src/rp2040/rp2040_pwm.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_RP2040_RP2040_PWM_H
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#define __ARCH_ARM_SRC_RP2040_RP2040_PWM_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include "hardware/rp2040_pwm.h"
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#include "nuttx/timers/pwm.h"
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#ifndef __ASSEMBLY__
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/* This structure represents the state of one PWM timer */
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struct rp2040_pwm_lowerhalf_s
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{
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const struct pwm_ops_s * ops; /* PWM operations */
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uint32_t frequency; /* PWM current frequency */
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uint32_t divisor; /* PWM current clock divisor */
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uint32_t flags; /* PWM mode flags */
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uint16_t top; /* PWM current top value */
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#if defined(CONFIG_PWM_NCHANNELS) && CONFIG_PWM_NCHANNELS == 2
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uint16_t duty[2];
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int8_t pin[2];
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#else
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uint16_t duty; /* Time duty value */
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int8_t pin;
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#endif
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uint8_t num; /* Timer ID */
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: rp2040_pwm_initialize
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*
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* Description:
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* Initialize the selected PWM port. And return a unique instance of struct
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* struct rp2040_pwm_lowerhalf_s. This function may be called to obtain
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* multiple instances of the interface, each of which may be set up with a
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* different frequency and address.
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*
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* Input Parameters:
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* Port number (for hardware that has multiple PWM interfaces)
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* GPIO pin number for pin A
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* GPIO pin number for pin B (CONFIG_PWM_NCHANNELS == 2)
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*
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* Returned Value:
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* Valid PWM device structure reference on success; a NULL on failure
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*
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****************************************************************************/
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#if defined(CONFIG_PWM_NCHANNELS) && CONFIG_PWM_NCHANNELS == 2
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struct rp2040_pwm_lowerhalf_s *rp2040_pwm_initialize(int port,
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int pin_a,
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int pin_b,
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uint32_t flags);
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#else
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struct rp2040_pwm_lowerhalf_s *rp2040_pwm_initialize(int port,
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int pin,
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uint32_t flags);
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#endif
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/****************************************************************************
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* Name: rp2040_pwmdev_uninitialize
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*
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* Description:
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* De-initialize the selected pwm port, and power down the device.
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*
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* Input Parameter:
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* Device structure as returned by the rp2040_pwmdev_initialize()
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*
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* Returned Value:
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* OK on success, ERROR when internal reference count mismatch or dev
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* points to invalid hardware device.
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*
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****************************************************************************/
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int rp2040_pwm_uninitialize(struct pwm_lowerhalf_s *dev);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_SRC_RP2040_RP2040_I2C_H */
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