mirror of https://github.com/ARMmbed/mbed-os.git
115 lines
3.0 KiB
C
115 lines
3.0 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2019, Arm Limited and affiliates.
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "pwmout_api.h"
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#include "mbed_error.h"
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#include "cyhal_pwm.h"
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#if DEVICE_PWMOUT
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#ifdef __cplusplus
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extern "C" {
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#endif
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static const int CY_US_PER_SECOND = 1000000;
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static const int CY_US_PER_MS = 1000;
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void pwmout_init(pwmout_t *obj, PinName pin)
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{
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if (CY_RSLT_SUCCESS != cyhal_pwm_init(&(obj->hal_pwm), pin, NULL)) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_PWM, MBED_ERROR_CODE_FAILED_OPERATION), "cyhal_pwm_init");
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}
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obj->period_us = 100;
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obj->width_us = 0;
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}
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void pwmout_free(pwmout_t *obj)
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{
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cyhal_pwm_free(&(obj->hal_pwm));
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}
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void pwmout_write(pwmout_t *obj, float percent)
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{
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MBED_ASSERT(percent >= 0.0f && percent <= 1.0f);
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pwmout_pulsewidth_us(obj, (int)(percent * obj->period_us));
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}
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float pwmout_read(pwmout_t *obj)
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{
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return ((float)(obj->width_us) / obj->period_us);
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}
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void pwmout_period(pwmout_t *obj, float seconds)
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{
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pwmout_period_us(obj, (int)(seconds * CY_US_PER_SECOND));
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}
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void pwmout_period_ms(pwmout_t *obj, int ms)
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{
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pwmout_period_us(obj, ms * CY_US_PER_MS);
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}
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void pwmout_period_us(pwmout_t *obj, int us)
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{
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obj->period_us = (uint32_t)us;
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if (CY_RSLT_SUCCESS != cyhal_pwm_set_period(&(obj->hal_pwm), obj->period_us, obj->width_us)) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_PWM, MBED_ERROR_CODE_FAILED_OPERATION), "cyhal_pwm_set_period");
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}
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if (CY_RSLT_SUCCESS != cyhal_pwm_start(&(obj->hal_pwm))) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_PWM, MBED_ERROR_CODE_FAILED_OPERATION), "cyhal_pwm_start");
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}
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}
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int pwmout_read_period_us(pwmout_t *obj)
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{
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return obj->period_us;
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}
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void pwmout_pulsewidth(pwmout_t *obj, float seconds)
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{
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pwmout_pulsewidth_us(obj, (int)(seconds * CY_US_PER_SECOND));
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}
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void pwmout_pulsewidth_ms(pwmout_t *obj, int ms)
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{
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pwmout_pulsewidth_us(obj, ms * CY_US_PER_MS);
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}
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void pwmout_pulsewidth_us(pwmout_t *obj, int us)
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{
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obj->width_us = (uint32_t)us;
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if (CY_RSLT_SUCCESS != cyhal_pwm_set_period(&(obj->hal_pwm), obj->period_us, obj->width_us)) {
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MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_PWM, MBED_ERROR_CODE_FAILED_OPERATION), "cyhal_pwm_set_period");
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}
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}
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int pwmout_read_pulsewidth_us(pwmout_t *obj)
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{
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return obj->width_us;
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}
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const PinMap *pwmout_pinmap(void)
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{
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return PinMap_PWM_OUT;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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