#include "adc_pdm_audio_codec.h"
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#include <esp_log.h>
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#include <esp_timer.h>
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#include <driver/i2c.h>
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#include <driver/i2c_master.h>
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#include <driver/i2s_tdm.h>
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#include "driver/i2s_pdm.h"
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#include "soc/gpio_sig_map.h"
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#include "soc/io_mux_reg.h"
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#include "hal/rtc_io_hal.h"
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#include "hal/gpio_ll.h"
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#include "settings.h"
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#include "config.h"
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static const char TAG[] = "AdcPdmAudioCodec";
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#define BSP_I2S_GPIO_CFG(_dout) \
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{ \
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.clk = GPIO_NUM_NC, \
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.dout = _dout, \
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.invert_flags = { \
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.clk_inv = false, \
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}, \
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}
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/**
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* @brief Mono Duplex I2S configuration structure
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*
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* This configuration is used by default in bsp_audio_init()
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*/
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#define BSP_I2S_DUPLEX_MONO_CFG(_sample_rate, _dout) \
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{ \
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.clk_cfg = I2S_PDM_TX_CLK_DEFAULT_CONFIG(_sample_rate), \
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.slot_cfg = I2S_PDM_TX_SLOT_DEFAULT_CONFIG(I2S_DATA_BIT_WIDTH_16BIT, I2S_SLOT_MODE_MONO), \
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.gpio_cfg = BSP_I2S_GPIO_CFG(_dout), \
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}
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AdcPdmAudioCodec::AdcPdmAudioCodec(int input_sample_rate, int output_sample_rate,
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uint32_t adc_mic_channel, gpio_num_t pdm_speak_p,gpio_num_t pdm_speak_n, gpio_num_t pa_ctl) {
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input_reference_ = false;
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input_sample_rate_ = input_sample_rate;
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output_sample_rate_ = output_sample_rate;
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audio_codec_adc_cfg_t cfg = {};
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cfg.handle = NULL;
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cfg.continuous_cfg.max_store_buf_size = 1024 * 2;
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cfg.continuous_cfg.conv_frame_size = 1024;
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cfg.continuous_cfg.sample_freq_hz = (uint32_t)input_sample_rate;
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cfg.continuous_cfg.conv_mode = ADC_CONV_SINGLE_UNIT_1;
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cfg.continuous_cfg.format = ADC_DIGI_OUTPUT_FORMAT_TYPE2;
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cfg.continuous_cfg.pattern_num = 1;
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cfg.continuous_cfg.cfg_mode = AUDIO_CODEC_ADC_CFG_MODE_SINGLE_UNIT;
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cfg.continuous_cfg.cfg.single_unit.unit_id = ADC_UNIT_1;
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cfg.continuous_cfg.cfg.single_unit.atten = ADC_ATTEN_DB_12;
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cfg.continuous_cfg.cfg.single_unit.bit_width = ADC_BITWIDTH_12;
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cfg.continuous_cfg.cfg.single_unit.channel_id[0] = (uint8_t)adc_mic_channel;
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const audio_codec_data_if_t *adc_if = audio_codec_new_adc_data(&cfg);
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esp_codec_dev_cfg_t codec_dev_cfg = {
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.dev_type = ESP_CODEC_DEV_TYPE_IN,
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.data_if = adc_if,
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};
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input_dev_ = esp_codec_dev_new(&codec_dev_cfg);
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if (!input_dev_) {
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ESP_LOGE(TAG, "Failed to create codec device");
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return;
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}
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i2s_chan_config_t chan_cfg = I2S_CHANNEL_DEFAULT_CONFIG(I2S_NUM_0, I2S_ROLE_MASTER);
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chan_cfg.auto_clear = true; // Auto clear the legacy data in the DMA buffer
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ESP_ERROR_CHECK(i2s_new_channel(&chan_cfg, &tx_handle_, NULL));
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i2s_pdm_tx_config_t pdm_cfg_default = BSP_I2S_DUPLEX_MONO_CFG((uint32_t)output_sample_rate, pdm_speak_p);
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pdm_cfg_default.clk_cfg.up_sample_fs = AUDIO_PDM_UPSAMPLE_FS;
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pdm_cfg_default.slot_cfg.sd_scale = I2S_PDM_SIG_SCALING_MUL_4;
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pdm_cfg_default.slot_cfg.hp_scale = I2S_PDM_SIG_SCALING_MUL_4;
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pdm_cfg_default.slot_cfg.lp_scale = I2S_PDM_SIG_SCALING_MUL_4;
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pdm_cfg_default.slot_cfg.sinc_scale = I2S_PDM_SIG_SCALING_MUL_4;
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const i2s_pdm_tx_config_t *p_i2s_cfg = &pdm_cfg_default;
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ESP_ERROR_CHECK(i2s_channel_init_pdm_tx_mode(tx_handle_, p_i2s_cfg));
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ESP_ERROR_CHECK(i2s_channel_enable(tx_handle_));
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audio_codec_i2s_cfg_t i2s_cfg = {
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.port = I2S_NUM_0,
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.rx_handle = NULL,
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.tx_handle = tx_handle_,
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};
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const audio_codec_data_if_t *i2s_data_if = audio_codec_new_i2s_data(&i2s_cfg);
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codec_dev_cfg.dev_type = ESP_CODEC_DEV_TYPE_OUT;
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codec_dev_cfg.codec_if = NULL;
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codec_dev_cfg.data_if = i2s_data_if;
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output_dev_ = esp_codec_dev_new(&codec_dev_cfg);
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output_volume_ = 100;
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if(pa_ctl != GPIO_NUM_NC) {
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pa_ctrl_pin_ = pa_ctl;
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gpio_config_t io_conf = {};
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io_conf.intr_type = GPIO_INTR_DISABLE;
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io_conf.mode = GPIO_MODE_OUTPUT;
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io_conf.pin_bit_mask = (1ULL << pa_ctrl_pin_);
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io_conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
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io_conf.pull_up_en = GPIO_PULLUP_DISABLE;
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gpio_config(&io_conf);
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}
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gpio_set_drive_capability(pdm_speak_p, GPIO_DRIVE_CAP_0);
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if(pdm_speak_n != GPIO_NUM_NC){
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PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[pdm_speak_n], PIN_FUNC_GPIO);
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gpio_set_direction(pdm_speak_n, GPIO_MODE_OUTPUT);
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esp_rom_gpio_connect_out_signal(pdm_speak_n, I2SO_SD_OUT_IDX, 1, 0); //反转输出 SD OUT 信号
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gpio_set_drive_capability(pdm_speak_n, GPIO_DRIVE_CAP_0);
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}
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// 初始化输出定时器
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esp_timer_create_args_t output_timer_args = {
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.callback = &AdcPdmAudioCodec::OutputTimerCallback,
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.arg = this,
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.dispatch_method = ESP_TIMER_TASK,
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.name = "output_timer"
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};
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ESP_ERROR_CHECK(esp_timer_create(&output_timer_args, &output_timer_));
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ESP_LOGI(TAG, "AdcPdmAudioCodec initialized");
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}
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AdcPdmAudioCodec::~AdcPdmAudioCodec() {
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// 删除定时器
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if (output_timer_) {
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esp_timer_stop(output_timer_);
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esp_timer_delete(output_timer_);
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output_timer_ = nullptr;
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}
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ESP_ERROR_CHECK(esp_codec_dev_close(output_dev_));
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esp_codec_dev_delete(output_dev_);
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ESP_ERROR_CHECK(esp_codec_dev_close(input_dev_));
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esp_codec_dev_delete(input_dev_);
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}
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void AdcPdmAudioCodec::SetOutputVolume(int volume) {
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ESP_ERROR_CHECK(esp_codec_dev_set_out_vol(output_dev_, volume));
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AudioCodec::SetOutputVolume(volume);
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}
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void AdcPdmAudioCodec::EnableInput(bool enable) {
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if (enable == input_enabled_) {
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return;
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}
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if (enable) {
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esp_codec_dev_sample_info_t fs = {
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.bits_per_sample = 16,
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.channel = 1,
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.channel_mask = ESP_CODEC_DEV_MAKE_CHANNEL_MASK(0),
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.sample_rate = (uint32_t)input_sample_rate_,
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.mclk_multiple = 0,
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};
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ESP_ERROR_CHECK(esp_codec_dev_open(input_dev_, &fs));
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} else {
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ESP_ERROR_CHECK(esp_codec_dev_close(input_dev_));
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}
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AudioCodec::EnableInput(enable);
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}
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void AdcPdmAudioCodec::EnableOutput(bool enable) {
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if (enable == output_enabled_) {
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return;
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}
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if (enable) {
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// Play 16bit 1 channel
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esp_codec_dev_sample_info_t fs = {
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.bits_per_sample = 16,
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.channel = 1,
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.channel_mask = 0,
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.sample_rate = (uint32_t)output_sample_rate_,
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.mclk_multiple = 0,
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};
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ESP_ERROR_CHECK(esp_codec_dev_open(output_dev_, &fs));
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ESP_ERROR_CHECK(esp_codec_dev_set_out_vol(output_dev_, output_volume_));
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// 强制按板卡配置重配PDM TX时钟，覆盖第三方库在set_fmt中的默认up_sample_fs
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// 若通道已启用，先禁用再重配，最后再启用
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ESP_ERROR_CHECK_WITHOUT_ABORT(i2s_channel_disable(tx_handle_));
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i2s_pdm_tx_clk_config_t clk_cfg = I2S_PDM_TX_CLK_DEFAULT_CONFIG((uint32_t)output_sample_rate_);
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clk_cfg.up_sample_fs = AUDIO_PDM_UPSAMPLE_FS;
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ESP_ERROR_CHECK(i2s_channel_reconfig_pdm_tx_clock(tx_handle_, &clk_cfg));
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ESP_ERROR_CHECK(i2s_channel_enable(tx_handle_));
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if(pa_ctrl_pin_ != GPIO_NUM_NC){
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gpio_set_level(pa_ctrl_pin_, 1);
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}
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// 启用输出时启动定时器
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if (output_timer_) {
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esp_timer_start_once(output_timer_, TIMER_TIMEOUT_US);
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}
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} else {
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// 禁用输出时停止定时器
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if (output_timer_) {
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esp_timer_stop(output_timer_);
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}
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if(pa_ctrl_pin_ != GPIO_NUM_NC){
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gpio_set_level(pa_ctrl_pin_, 0);
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}
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ESP_ERROR_CHECK(esp_codec_dev_close(output_dev_));
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}
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AudioCodec::EnableOutput(enable);
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}
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int AdcPdmAudioCodec::Read(int16_t* dest, int samples) {
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if (input_enabled_) {
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ESP_ERROR_CHECK_WITHOUT_ABORT(esp_codec_dev_read(input_dev_, (void*)dest, samples * sizeof(int16_t)));
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}
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return samples;
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}
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int AdcPdmAudioCodec::Write(const int16_t* data, int samples) {
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if (output_enabled_) {
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ESP_ERROR_CHECK_WITHOUT_ABORT(esp_codec_dev_write(output_dev_, (void*)data, samples * sizeof(int16_t)));
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// 重置输出定时器
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if (output_timer_) {
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esp_timer_stop(output_timer_);
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esp_timer_start_once(output_timer_, TIMER_TIMEOUT_US);
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}
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}
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return samples;
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}
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void AdcPdmAudioCodec::Start() {
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Settings settings("audio", false);
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output_volume_ = settings.GetInt("output_volume", output_volume_);
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if (output_volume_ <= 0) {
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ESP_LOGW(TAG, "Output volume value (%d) is too small, setting to default (10)", output_volume_);
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output_volume_ = 10;
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}
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EnableInput(true);
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EnableOutput(true);
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ESP_LOGI(TAG, "Audio codec started");
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}
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// 定时器回调函数实现
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void AdcPdmAudioCodec::OutputTimerCallback(void* arg) {
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AdcPdmAudioCodec* codec = static_cast<AdcPdmAudioCodec*>(arg);
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if (codec && codec->output_enabled_) {
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codec->EnableOutput(false);
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}
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}
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