71 lines
2.5 KiB
C
71 lines
2.5 KiB
C
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// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
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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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* NOTICE
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* The hal is not public api, don't use in application code.
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* See readme.md in soc/include/hal/readme.md
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******************************************************************************/
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// The HAL layer for SIGMADELTA.
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// There is no parameter check in the hal layer, so the caller must ensure the correctness of the parameters.
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#pragma once
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#include "soc/sigmadelta_periph.h"
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#include "hal/sigmadelta_types.h"
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#include "hal/sigmadelta_ll.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Context that should be maintained by both the driver and the HAL
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*/
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typedef struct {
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gpio_sd_dev_t *dev;
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} sigmadelta_hal_context_t;
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/**
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* @brief Set Sigma-delta channel duty.
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*
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* @param hal Context of the HAL layer
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* @param channel Sigma-delta channel number
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* @param duty Sigma-delta duty of one channel, the value ranges from -128 to 127, recommended range is -90 ~ 90.
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* The waveform is more like a random one in this range.
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*/
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#define sigmadelta_hal_set_duty(hal, channel, duty) sigmadelta_ll_set_duty((hal)->dev, channel, duty)
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/**
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* @brief Set Sigma-delta channel's clock pre-scale value.
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*
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* @param hal Context of the HAL layer
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* @param channel Sigma-delta channel number
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* @param prescale The divider of source clock, ranges from 0 to 255
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*/
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#define sigmadelta_hal_set_prescale(hal, channel, prescale) sigmadelta_ll_set_prescale((hal)->dev, channel, prescale)
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/**
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* @brief Init the SIGMADELTA hal and set the SIGMADELTA to the default configuration. This function should be called first before other hal layer function is called
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*
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* @param hal Context of the HAL layer
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* @param sigmadelta_num The uart port number, the max port number is (SIGMADELTA_NUM_MAX -1)
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*/
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void sigmadelta_hal_init(sigmadelta_hal_context_t *hal, int sigmadelta_num);
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#ifdef __cplusplus
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}
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#endif
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