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59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/*
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* SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include <stdbool.h>
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#include "hal/misc.h"
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#include "hal/assert.h"
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#include "soc/gpio_ext_struct.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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* @brief Set Sigma-delta enable
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*
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* @param hw Peripheral SIGMADELTA hardware instance address.
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* @param en Sigma-delta enable value
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*/
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static inline void sdm_ll_enable_clock(gpio_sd_dev_t *hw, bool en)
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{
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hw->misc.function_clk_en = en;
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}
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/**
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* @brief Set Sigma-delta channel duty.
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*
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* @param hw Peripheral SIGMADELTA hardware instance address.
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* @param channel Sigma-delta channel number
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* @param density Sigma-delta quantized density 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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__attribute__((always_inline))
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static inline void sdm_ll_set_pulse_density(gpio_sd_dev_t *hw, int channel, int8_t density)
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{
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HAL_FORCE_MODIFY_U32_REG_FIELD(hw->channel[channel], duty, (uint32_t)density);
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}
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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 hw Peripheral SIGMADELTA hardware instance address.
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* @param channel Sigma-delta channel number
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* @param prescale The divider of source clock, ranges from 1 to 256
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*/
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static inline void sdm_ll_set_prescale(gpio_sd_dev_t *hw, int channel, uint32_t prescale)
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{
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HAL_ASSERT(prescale && prescale <= 256);
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HAL_FORCE_MODIFY_U32_REG_FIELD(hw->channel[channel], prescale, prescale - 1);
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}
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#ifdef __cplusplus
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}
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#endif
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