diff options
Diffstat (limited to 'atmel-samd/asf4/samd21/hal/src/hal_pwm.c')
| -rw-r--r-- | atmel-samd/asf4/samd21/hal/src/hal_pwm.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/atmel-samd/asf4/samd21/hal/src/hal_pwm.c b/atmel-samd/asf4/samd21/hal/src/hal_pwm.c new file mode 100644 index 000000000..2b9d2606f --- /dev/null +++ b/atmel-samd/asf4/samd21/hal/src/hal_pwm.c @@ -0,0 +1,169 @@ +/** + * \file + * + * \brief PWM functionality implementation. + * + * Copyright (C) 2015 Atmel Corporation. All rights reserved. + * + * \asf_license_start + * + * \page License + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * 3. The name of Atmel may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * 4. This software may only be redistributed and used in connection with an + * Atmel microcontroller product. + * + * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE + * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + * \asf_license_stop + * + */ + +#include "hal_pwm.h" +#include <utils_assert.h> +#include <utils.h> + +/** + * \brief Driver version + */ +#define DRIVER_VERSION 0x00000001u + +static void pwm_period_expired(struct _pwm_device *device); +static void pwm_detect_fault(struct _pwm_device *device); + +/** + * \brief Initialize pwm + */ +int32_t pwm_init(struct pwm_descriptor *const descr, void *const hw, struct _pwm_hpl_interface *const func) +{ + ASSERT(descr && hw); + _pwm_init(&descr->device, hw); + descr->device.callback.pwm_period_cb = pwm_period_expired; + descr->device.callback.pwm_error_cb = pwm_detect_fault; + return ERR_NONE; +} + +/** + * \brief Deinitialize pwm + */ +int32_t pwm_deinit(struct pwm_descriptor *const descr) +{ + ASSERT(descr); + _pwm_deinit(&descr->device); + + return ERR_NONE; +} + +/** + * \brief Start pwm + */ +int32_t pwm_enable(struct pwm_descriptor *const descr) +{ + ASSERT(descr); + if (_pwm_is_enabled(&descr->device)) { + return ERR_DENIED; + } + _pwm_enable(&descr->device); + + return ERR_NONE; +} + +/** + * \brief Stop pwm + */ +int32_t pwm_disable(struct pwm_descriptor *const descr) +{ + ASSERT(descr); + if (!_pwm_is_enabled(&descr->device)) { + return ERR_DENIED; + } + _pwm_disable(&descr->device); + + return ERR_NONE; +} + +/** + * \brief Register PWM callback + */ +int32_t pwm_register_callback(struct pwm_descriptor *const descr, enum pwm_callback_type type, pwm_cb_t cb) +{ + switch (type) { + case PWM_PERIOD_CB: + descr->pwm_cb.period = cb; + break; + + case PWM_ERROR_CB: + descr->pwm_cb.error = cb; + break; + + default: + return ERR_INVALID_ARG; + } + ASSERT(descr); + _pwm_set_irq_state(&descr->device, (enum _pwm_callback_type)type, NULL != cb); + return ERR_NONE; +} + +/** + * \brief Change PWM parameter + */ +int32_t pwm_set_parameters(struct pwm_descriptor *const descr, const pwm_period_t period, const pwm_period_t duty_cycle) +{ + ASSERT(descr); + _pwm_set_param(&descr->device, period, duty_cycle); + return ERR_NONE; +} + +/** + * \brief Retrieve the current driver version + */ +uint32_t pwm_get_version(void) +{ + return DRIVER_VERSION; +} + +/** + * \internal Process interrupts caused by period experied + */ +static void pwm_period_expired(struct _pwm_device *device) +{ + struct pwm_descriptor *const descr = CONTAINER_OF(device, struct pwm_descriptor, device); + + if (descr->pwm_cb.period) { + descr->pwm_cb.period(descr); + } +} + +/** + * \internal Process interrupts caused by pwm fault + */ +static void pwm_detect_fault(struct _pwm_device *device) +{ + struct pwm_descriptor *const descr = CONTAINER_OF(device, struct pwm_descriptor, device); + + if (descr->pwm_cb.error) { + descr->pwm_cb.error(descr); + } +} |