131 lines
4.6 KiB
C
131 lines
4.6 KiB
C
/**
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* Copyright (c) 2016 - 2019, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef MAX9850_H__
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#define MAX9850_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#include "nrf_drv_twi.h"
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/**
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* @brief Default MAX9850 TWI configuration
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*
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* @param scl_pin SCL pin number
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* @param sda_pin SDA pin number
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*/
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#define MAX9850_DEFAULT_TWI_CONFIG(scl_pin, sda_pin) { \
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.scl = scl_pin, \
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.sda = sda_pin, \
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.frequency = NRF_DRV_TWI_FREQ_100K, \
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.interrupt_priority = APP_IRQ_PRIORITY_HIGH, \
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.clear_bus_init = false, \
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.hold_bus_uninit = false \
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}
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/**
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* @brief Internal MAX9850 register map
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* */
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typedef struct {
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uint8_t status_a; //!< Status register A (R)
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uint8_t status_b; //!< Status register B (R)
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uint8_t volume; //!< Volume control (RW)
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uint8_t general_purpose; //!< General purpose register (RW)
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uint8_t interrupt_enable; //!< Interrupt enable (RW)
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uint8_t enable; //!< Enable register (RW)
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uint8_t clock; //!< Clock control (RW)
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uint8_t charge_pump; //!< Charge pump (RW)
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uint8_t lrclk_msb; //!< LRCLK MSB register (RW)
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uint8_t lrclk_lsb; //!< LRCLK LSB register (RW)
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uint8_t digital_audio; //!< Digital audio (RW)
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} max9850_regmap_t;
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/**
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* @brief MAX9850 register map after reset
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* */
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#define MAX9850_DEFAULT_REGMAP() { \
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.status_a = 0, \
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.status_b = 0, \
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.volume = 0x0C, \
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.general_purpose = 0, \
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.interrupt_enable = 0, \
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.enable = 0, \
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.clock = 0, \
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.charge_pump = 0, \
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.lrclk_msb = 0, \
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.lrclk_lsb = 0, \
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.digital_audio = 0, \
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}
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/**
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* @brief Helper macro for creating MAX9850 TWI address
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* */
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#define MAX9850_TWI_ADDR(v) (0x10 + (v))
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/**
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* @brief MAX9850 configuration
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* */
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typedef struct {
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nrf_drv_twi_t twi; //!< TWI instance
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nrf_drv_twi_config_t twi_cfg; //!< TWI configuration
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max9850_regmap_t regmap; //!< MAX9850 register map
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uint8_t twi_addr; //!< MAX9850 TWI address
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} max9850_config_t;
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/**
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* @brief Initializes MAX9850 IC
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*
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* @param p_max9850 MAX9850 configuration
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*
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* @return Standard error code
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* */
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ret_code_t max9850_init(max9850_config_t const * p_max9850);
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#ifdef __cplusplus
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}
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#endif
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#endif /* MAX9850_H__ */
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