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Diffstat (limited to 'watch-library/hal/src/hal_pwm.c')
| -rw-r--r-- | watch-library/hal/src/hal_pwm.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/watch-library/hal/src/hal_pwm.c b/watch-library/hal/src/hal_pwm.c new file mode 100644 index 00000000..bc0629fd --- /dev/null +++ b/watch-library/hal/src/hal_pwm.c @@ -0,0 +1,160 @@ +/** + * \file + * + * \brief PWM functionality implementation. + * + * Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries. + * + * \asf_license_start + * + * \page License + * + * Subject to your compliance with these terms, you may use Microchip + * software and any derivatives exclusively with Microchip products. + * It is your responsibility to comply with third party license terms applicable + * to your use of third party software (including open source software) that + * may accompany Microchip software. + * + * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, + * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, + * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, + * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE + * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL + * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE + * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE + * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT + * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY + * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY, + * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE. + * + * \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 && func); + descr->func = func; + descr->func->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 && descr->func); + descr->func->deinit(&descr->device); + + return ERR_NONE; +} + +/** + * \brief Start pwm + */ +int32_t pwm_enable(struct pwm_descriptor *const descr) +{ + ASSERT(descr && descr->func); + if (descr->func->is_pwm_enabled(&descr->device)) { + return ERR_DENIED; + } + descr->func->start_pwm(&descr->device); + + return ERR_NONE; +} + +/** + * \brief Stop pwm + */ +int32_t pwm_disable(struct pwm_descriptor *const descr) +{ + ASSERT(descr && descr->func); + if (!descr->func->is_pwm_enabled(&descr->device)) { + return ERR_DENIED; + } + descr->func->stop_pwm(&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 && descr->func); + descr->func->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 && descr->func); + descr->func->set_pwm_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); + } +} |