circuitpython/nrf5/hal/hal_pwm.h

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Glenn Ruben Bakke
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef HAL_PWM_H__
#define HAL_PWM_H__
#include <stdint.h>
#include "nrf.h"
// TODO: nrf51 series need Soft PWM. Not part of HAL.
#if NRF52
#define PWM0 ((NRF_PWM_Type *)NRF_PWM0_BASE)
#define PWM0_IRQ_NUM PWM1_IRQn
#define PWM1 ((NRF_PWM_Type *)NRF_PWM1_BASE)
#define PWM1_IRQ_NUM PWM1_IRQn
#define PWM2 ((NRF_PWM_Type *)NRF_PWM2_BASE)
#define PWM2_IRQ_NUM PWM2_IRQn
#if 0 // TODO: nrf52840
#define PWM3 ((NRF_PWM_Type *)NRF_PWM3_BASE)
#define PWM3_IRQ_NUM PWM3_IRQn
#endif
#else
#error "Device not supported."
#endif
/**
* @brief PWM frequency type definition
*/
typedef enum {
HAL_PWM_FREQ_16Mhz = 0,
HAL_PWM_FREQ_8Mhz,
HAL_PWM_FREQ_4Mhz,
HAL_PWM_FREQ_2Mhz,
HAL_PWM_FREQ_1Mhz,
HAL_PWM_FREQ_500khz,
HAL_PWM_FREQ_250khz,
HAL_PWM_FREQ_125khz
} hal_pwm_freq_t;
typedef struct {
uint8_t pwm_pin;
hal_pwm_freq_t freq;
uint8_t duty;
uint16_t period;
} hal_pwm_init_t;
/**
* @brief PWM handle Structure definition
*/
typedef struct __PWM_HandleTypeDef
{
NRF_PWM_Type *instance; /* PWM registers base address */
hal_pwm_init_t init; /* PWM initialization parameters */
} PWM_HandleTypeDef;
void hal_pwm_init(NRF_PWM_Type * p_instance, hal_pwm_init_t const * p_pwm_init);
void hal_pwm_freq_set(NRF_PWM_Type * p_instance, uint16_t freq);
void hal_pwm_period_set(NRF_PWM_Type * p_instance, uint16_t period);
void hal_pwm_duty_set(NRF_PWM_Type * p_instance, uint8_t duty);
#endif // HAL_PWM_H__