[问答]

I2S WM8978播放速度慢，有哒哒哒噪声的原因？如何解决？

问答对人有帮助，内容完整，我也想知道答案 0 使用STM32F4的I2S接口，直接找的论坛的I2S代码 drv_i2s代码，发现能够正常播放音频，但是播放速度慢，有频率很高的哒哒哒的噪声，求助原因，代码如下： drv_i2s: I2S_HandleTypeDef hi2s2; DMA_HandleTypeDef hdma_spi2_tx; struct stm32_audio { struct rt_i2c_bus_device i2c_bus; struct rt_audio_device audio; struct rt_audio_configure replay_config; int replay_volume; rt_uint8_t tx_fifo; rt_bool_t startup; }; struct stm32_audio _stm32_audio_play = {0}; void i2s_samplerate_set(rt_uint32_t freq) { if(freq == I2S_AUDIOFREQ_8K \|\| freq == I2S_AUDIOFREQ_11K \|\| freq == I2S_AUDIOFREQ_16K \|\| freq == I2S_AUDIOFREQ_22K \|\| freq == I2S_AUDIOFREQ_32K \|\| freq == I2S_AUDIOFREQ_44K \|\| freq == I2S_AUDIOFREQ_48K \|\| freq == I2S_AUDIOFREQ_96K) { hi2s2.Init.AudioFreq = freq; } else { return; } __HAL_I2S_DISABLE(&hi2s2); HAL_I2S_Init(&hi2s2); __HAL_I2S_ENABLE(&hi2s2); } void i2s_channels_set(rt_uint16_t channels) { } void i2s_samplebits_set(rt_uint16_t samplebits) { switch (samplebits) { case 16: hi2s2.Init.DataFormat = I2S_DATAFORMAT_16B; break; case 24: hi2s2.Init.DataFormat = I2S_DATAFORMAT_24B; break; case 32: hi2s2.Init.DataFormat = I2S_DATAFORMAT_32B; break; default: hi2s2.Init.DataFormat = I2S_DATAFORMAT_16B; break; } __HAL_I2S_DISABLE(&hi2s2); HAL_I2S_Init(&hi2s2); __HAL_I2S_ENABLE(&hi2s2); } void i2s_config_set(struct rt_audio_configure config) { i2s_channels_set(config.channels); i2s_samplerate_set(config.samplerate); i2s_samplebits_set(config.samplebits); } rt_err_t I2S_config_init(void) { hi2s2.Instance = SPI2; hi2s2.Init.Mode = I2S_MODE_MASTER_TX; hi2s2.Init.Standard = I2S_STANDARD_PHILIPS; hi2s2.Init.DataFormat = I2S_DATAFORMAT_16B; hi2s2.Init.MCLKOutput = I2S_MCLKOUTPUT_ENABLE; hi2s2.Init.AudioFreq = I2S_AUDIOFREQ_8K; hi2s2.Init.CPOL = I2S_CPOL_LOW; hi2s2.Init.ClockSource = I2S_CLOCK_PLL; hi2s2.Init.FullDuplexMode = I2S_FULLDUPLEXMODE_ENABLE; if (HAL_I2S_Init(&hi2s2) != HAL_OK) { rt_kprintf("HAL_I2S_Init error\n"); } SET_BIT(hi2s2.Instance->CR2, SPI_CR2_TXDMAEN); __HAL_I2S_ENABLE(&hi2s2); return RT_EOK; } void I2S_DMAConvCplt(DMA_HandleTypeDef hdma) { rt_audio_tx_complete(&_stm32_audio_play.audio); } void I2S_DMAError(DMA_HandleTypeDef hdma) { // rt_kprintf("DMAError\n"); } void DMA1_Stream4_IRQHandler(void) { rt_interrupt_enter(); HAL_DMA_IRQHandler(&hdma_spi2_tx); rt_interrupt_leave(); } void HAL_I2S_TxHalfCpltCallback(I2S_HandleTypeDef hi2s) { rt_kprintf("HAL_I2S_TxHalfCpltCallback pk 1\n"); rt_audio_tx_complete(&_stm32_audio_play.audio); } void I2S_TxHalfCpltCallback(I2S_HandleTypeDef hi2s) { rt_audio_tx_complete(&_stm32_audio_play.audio); } void HAL_I2S_TxCpltCallback(I2S_HandleTypeDef hi2s) { rt_kprintf("HAL_I2S_TxCpltCallback pk 2\n"); rt_audio_tx_complete(&_stm32_audio_play.audio); } rt_err_t I2S_tx_dma(void) { __HAL_DMA_ENABLE_IT(&hdma_spi2_tx,DMA_IT_TC);//开启DMA传输完成中断 __HAL_DMA_ENABLE_IT(&hdma_spi2_tx, DMA_IT_HT); //开启DMA半传输传输完成中断 __HAL_DMA_CLEAR_FLAG(&hdma_spi2_tx, DMA_FLAG_TCIF0_4); //注册回调函数,读取数据等操作在这里面处理 hdma_spi2_tx.XferCpltCallback = I2S_DMAConvCplt; hdma_spi2_tx.XferM1CpltCallback = I2S_DMAConvCplt; hdma_spi2_tx.XferErrorCallback = I2S_DMAError; hdma_spi2_tx.XferHalfCpltCallback=I2S_TxHalfCpltCallback; HAL_NVIC_SetPriority(DMA1_Stream4_IRQn, 0, 0); HAL_NVIC_EnableIRQ(DMA1_Stream4_IRQn); return RT_EOK; } rt_err_t i2s_tx_init() { / set I2S_TX DMA / I2S_config_init(); I2S_tx_dma(); return RT_EOK; } static rt_err_t stm32_player_getcaps(struct rt_audio_device audio, struct rt_audio_caps caps) { rt_err_t result = RT_EOK; struct stm32_audio st_audio = (struct stm32_audio )audio->parent.user_data; LOG_D("%s:main_type: %d, sub_type: %d", __FUNCTION__, caps->main_type, caps->sub_type); switch (caps->main_type) { case AUDIO_TYPE_QUERY: / query the types of hw_codec device / { switch (caps->sub_type) { case AUDIO_TYPE_QUERY: caps->udata.mask = AUDIO_TYPE_OUTPUT \| AUDIO_TYPE_MIXER; break; default: result = -RT_ERROR; break; } break; } case AUDIO_TYPE_OUTPUT: / Provide capabilities of OUTPUT unit / { switch (caps->sub_type) { case AUDIO_DSP_PARAM: caps->udata.config.channels = st_audio->replay_config.channels; caps->udata.config.samplebits = st_audio->replay_config.samplebits; caps->udata.config.samplerate = st_audio->replay_config.samplerate; break; case AUDIO_DSP_SAMPLERATE: caps->udata.config.samplerate = st_audio->replay_config.samplerate; break; case AUDIO_DSP_CHANNELS: caps->udata.config.channels = st_audio->replay_config.channels; break; case AUDIO_DSP_SAMPLEBITS: caps->udata.config.samplebits = st_audio->replay_config.samplebits; break; default: result = -RT_ERROR; break; } break; } case AUDIO_TYPE_MIXER: / report the Mixer Units / { switch (caps->sub_type) { case AUDIO_MIXER_QUERY: caps->udata.mask = AUDIO_MIXER_VOLUME \| AUDIO_MIXER_LINE; break; case AUDIO_MIXER_VOLUME: caps->udata.value = st_audio->replay_volume; break; case AUDIO_MIXER_LINE: break; default: result = -RT_ERROR; break; } break; } default: result = -RT_ERROR; break; } return result; } static rt_err_t stm32_player_configure(struct rt_audio_device audio, struct rt_audio_caps caps) { rt_err_t result = RT_EOK; struct stm32_audio st_audio = (struct stm32_audio )audio->parent.user_data; LOG_D("%s:main_type: %d, sub_type: %d", __FUNCTION__, caps->main_type, caps->sub_type); switch (caps->main_type) { case AUDIO_TYPE_MIXER: { switch (caps->sub_type) { case AUDIO_MIXER_MUTE: { / set mute mode / wm8978_mute_enabled(_stm32_audio_play.i2c_bus, RT_FALSE); break; } case AUDIO_MIXER_VOLUME: { int volume = caps->udata.value; st_audio->replay_volume = volume; / set mixer volume / wm8978_set_volume(_stm32_audio_play.i2c_bus, volume); break; } default: result = -RT_ERROR; break; } break; } case AUDIO_TYPE_OUTPUT: { switch (caps->sub_type) { case AUDIO_DSP_PARAM: { struct rt_audio_configure config = caps->udata.config; st_audio->replay_config.samplerate = config.samplerate; st_audio->replay_config.samplebits = config.samplebits; st_audio->replay_config.channels = config.channels; i2s_config_set(config); break; } case AUDIO_DSP_SAMPLERATE: { st_audio->replay_config.samplerate = caps->udata.config.samplerate; i2s_samplerate_set(caps->udata.config.samplerate); break; } case AUDIO_DSP_CHANNELS: { st_audio->replay_config.channels = caps->udata.config.channels; i2s_channels_set(caps->udata.config.channels); break; } case AUDIO_DSP_SAMPLEBITS: { st_audio->replay_config.samplebits = caps->udata.config.samplebits; i2s_samplebits_set(caps->udata.config.samplebits); break; } default: result = -RT_ERROR; break; } break; } default: break; } return result; } static rt_err_t stm32_player_init(struct rt_audio_device audio) { /* initialize wm8978 / _stm32_audio_play.i2c_bus = (struct rt_i2c_bus_device )rt_device_find(CODEC_I2C_NAME); i2s_tx_init(); wm8978_init(_stm32_audio_play.i2c_bus); return RT_EOK; } static rt_err_t stm32_player_start(struct rt_audio_device audio, int stream) { if (stream == AUDIO_STREAM_REPLAY) { rt_kprintf("HAL_I2S_Transmit_DMA start\n"); wm8978_player_start(_stm32_audio_play.i2c_bus); HAL_DMAEx_MultiBufferStart_IT(&hdma_spi2_tx, (uint32_t)_stm32_audio_play.tx_fifo, (uint32_t) & (SPI2->DR), (uint32_t)(_stm32_audio_play.tx_fifo + TX_DMA_FIFO_SIZE / 2), TX_DMA_FIFO_SIZE / 2); //HAL_I2S_Transmit_DMA(&hi2s2,(uint16_t )_stm32_audio_play.tx_fifo,TX_DMA_FIFO_SIZE); } return RT_EOK; } static rt_err_t stm32_player_stop(struct rt_audio_device audio, int stream) { if (stream == AUDIO_STREAM_REPLAY) { HAL_I2S_DMAStop(&hi2s2); rt_kprintf("HAL_I2S_Transmit_DMA stop\n"); } return RT_EOK; } static void stm32_player_buffer_info(struct rt_audio_device audio, struct rt_audio_buf_info info) { /* * TX_FIFO * +----------------+----------------+ * \| block1 \| block2 \| * +----------------+----------------+ * \ block_size / / info->buffer = _stm32_audio_play.tx_fifo; info->total_size = TX_DMA_FIFO_SIZE; info->block_size = TX_DMA_FIFO_SIZE / 2; info->block_count = 2; } static struct rt_audio_ops _p_audio_ops = { .getcaps = stm32_player_getcaps, .configure = stm32_player_configure, .init = stm32_player_init, .start = stm32_player_start, .stop = stm32_player_stop, .transmit = NULL, .buffer_info = stm32_player_buffer_info, }; int rt_hw_sound_init(void) { rt_uint8_t tx_fifo; /* player / tx_fifo = rt_malloc(TX_DMA_FIFO_SIZE); if (tx_fifo == RT_NULL) { return -RT_ENOMEM; } rt_memset(tx_fifo, 0, TX_DMA_FIFO_SIZE); _stm32_audio_play.tx_fifo = tx_fifo; _stm32_audio_play.tx_fifo = tx_fifo; / init default configuration / { _stm32_audio_play.replay_config.samplerate = 48000; _stm32_audio_play.replay_config.channels = 1; _stm32_audio_play.replay_config.samplebits = 16; _stm32_audio_play.replay_volume = 15; } / register sound device / _stm32_audio_play.audio.ops = &_p_audio_ops; rt_audio_register(&_stm32_audio_play.audio, "sound0", RT_DEVICE_FLAG_WRONLY, &_stm32_audio_play); return RT_EOK; } INIT_DEVICE_EXPORT(rt_hw_sound_init); 使用的模拟i2c控制，msp初始化如下： extern DMA_HandleTypeDef hdma_spi2_tx; void HAL_I2S_MspInit(I2S_HandleTypeDef hi2s) { if (hi2s->Instance == SPI2) { RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0}; PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_I2S; PeriphClkInitStruct.PLLI2S.PLLI2SN = 271; PeriphClkInitStruct.PLLI2S.PLLI2SR = 2; if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) { Error_Handler(); } GPIO_InitTypeDef GPIO_InitStruct; /* Peripheral clock enable / __HAL_RCC_SPI2_CLK_ENABLE(); __HAL_RCC_GPIOC_CLK_ENABLE(); __HAL_RCC_GPIOB_CLK_ENABLE(); __HAL_RCC_GPIOD_CLK_ENABLE(); __HAL_RCC_GPIOI_CLK_ENABLE(); /I2S2 GPIO Configuration PC2 ------> I2S2_ext_SD PC3 ------> I2S2_SD PB12 ------> I2S2_WS PB13 ------> I2S2_CK PC6 ------> I2S2_MCK / GPIO_InitStruct.Pin = GPIO_PIN_2; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; GPIO_InitStruct.Alternate = GPIO_AF6_I2S2ext; HAL_GPIO_Init(GPIOC, &GPIO_InitStruct); GPIO_InitStruct.Pin = GPIO_PIN_6; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; GPIO_InitStruct.Alternate = GPIO_AF5_SPI2; HAL_GPIO_Init(GPIOC, &GPIO_InitStruct); GPIO_InitStruct.Pin = GPIO_PIN_3; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; GPIO_InitStruct.Alternate = GPIO_AF5_SPI2; HAL_GPIO_Init(GPIOI, &GPIO_InitStruct); GPIO_InitStruct.Pin = GPIO_PIN_12; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; GPIO_InitStruct.Alternate = GPIO_AF5_SPI2; HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); GPIO_InitStruct.Pin = GPIO_PIN_3; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; GPIO_InitStruct.Alternate = GPIO_AF5_SPI2; HAL_GPIO_Init(GPIOD, &GPIO_InitStruct); __HAL_RCC_DMA1_CLK_ENABLE(); hdma_spi2_tx.Instance = DMA1_Stream4; //DMA1数据流4 hdma_spi2_tx.Init.Channel = DMA_CHANNEL_0; //通道0 hdma_spi2_tx.Init.Direction = DMA_MEMORY_TO_PERIPH; //存储器到外设模式 hdma_spi2_tx.Init.PeriphInc = DMA_PINC_DISABLE; //外设非增量模式 hdma_spi2_tx.Init.MemInc = DMA_MINC_ENABLE; //存储器增量模式 /todo 这里按照道理应该根据数据位宽来配置 ?/ hdma_spi2_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD; //外设数据长度:16位 hdma_spi2_tx.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD; //存储器数据长度:16位 hdma_spi2_tx.Init.Mode = DMA_CIRCULAR; //使用循环模式 hdma_spi2_tx.Init.Priority = DMA_PRIORITY_VERY_HIGH; //高优先级 hdma_spi2_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE; //不使用FIFO hdma_spi2_tx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL; // 使用FIFO阈值完全配置 hdma_spi2_tx.Init.MemBurst = DMA_MBURST_SINGLE; //存储器单次突发传输 hdma_spi2_tx.Init.PeriphBurst = DMA_MBURST_SINGLE; //外设突发单次传输 if (HAL_DMA_Init(&hdma_spi2_tx) != HAL_OK) { Error_Handler(); } __HAL_LINKDMA(hi2s,hdmatx,hdma_spi2_tx); } } 其实一开始的播放速度很慢很慢，后面我修改了DMAFIFO的大小，调大了，速度就快了些，但是总的来说还是慢，且噪声非常大 #define TX_DMA_FIFO_SIZE (4096) #define I2S_SOUND_NAME "sound0" #define CODEC_I2C_NAME ("i2c1") 卡了很久了，求助 0 本主题由 Harmony技术专家于 2024-7-16 17:12 审核通过
2024-7-16 06:12:50　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × wang21cj 该类别下有 4 个回答。邀请回答请叫我杰西卡该类别下有 4 个回答。邀请回答 lhhgff 该类别下有 4 个回答。邀请回答 bertvwang 该类别下有 3 个回答。邀请回答 fdhsfagd 该类别下有 3 个回答。邀请回答 ZQW发烧友该类别下有 3 个回答。邀请回答温暖镜头该类别下有 3 个回答。邀请回答 vewwerwr 该类别下有 3 个回答。邀请回答 huzp_bbs 该类别下有 3 个回答。邀请回答 shbaoyan 该类别下有 3 个回答。邀请回答幽默该类别下有 3 个回答。邀请回答 bigbangboom 该类别下有 2 个回答。邀请回答 jinheng 该类别下有 2 个回答。邀请回答 fansz 该类别下有 2 个回答。邀请回答 Wu雨雨雨该类别下有 2 个回答。邀请回答胖子的逆袭该类别下有 2 个回答。邀请回答沈文强66 该类别下有 2 个回答。邀请回答京五环以外该类别下有 2 个回答。邀请回答 qjqb 该类别下有 2 个回答。邀请回答 horayte 该类别下有 2 个回答。邀请回答举报郑成枝相关推荐 • 如何利用I2S驱动WM8978？ 1490 • wm8978的lout和rout没有输出 6639 • STM32F411能否外接I2S芯片WM8978？ 3352 • 请问CH32V307的I2S有没有双全工模式？ 549 • wm8978实现了录音和播放音乐但无法修改音量 4333 • wm8978录音回放改成24位调不通 2814 • 如何消除WM8978PCB设计中老存在的噪声？ 4005 • 请问音频芯片WM8978和VS1053B的有什么区别？ 7169 • STM32F407XX I2S DMA循环buffer播放DMA中断不一致怎么解决？ 275 • wm8978音频回环 7390 1个回答

答案对人有帮助，有参考价值 0 根据您提供的信息，播放速度慢和哒哒哒噪声的原因可能有以下几点： 1. 采样率设置不正确：请检查您的音频文件的采样率是否与STM32F4的I2S接口设置的采样率相匹配。如果采样率不匹配，可能导致播放速度变慢。 2. I2S时钟配置问题：请检查I2S时钟配置是否正确。错误的时钟配置可能导致播放速度慢和噪声问题。 3. DMA配置问题：请检查DMA的配置，确保DMA传输速率和数据大小设置正确。错误的DMA配置可能导致播放速度慢和噪声问题。 4. 音频文件格式问题：请检查音频文件的格式是否支持或兼容。某些音频格式可能需要特定的解码器或处理方式。 5. 代码问题：请仔细检查您的代码，确保I2S初始化、配置和数据处理部分没有错误。解决方案： 1. 检查采样率设置：确保音频文件的采样率与STM32F4的I2S接口设置的采样率相匹配。 2. 检查I2S时钟配置：确保I2S时钟配置正确，可以参考STM32F4的参考手册进行配置。 3. 检查DMA配置：确保DMA的配置正确，包括传输速率和数据大小。 4. 检查音频文件格式：确保音频文件格式支持或兼容，如果需要，可以尝试转换音频文件格式。 5. 检查代码：仔细检查您的代码，确保I2S初始化、配置和数据处理部分没有错误。如果可能，可以参考其他成功的项目或示例代码。 6. 使用示波器或逻辑分析仪检查I2S信号：这可以帮助您确定问题是否出在硬件上，例如I2S接口或连接线。 7. 更新固件和库：确保您使用的STM32F4固件和库是最新版本，以避免已知的问题。通过以上步骤，您应该能够找到问题的原因并解决播放速度慢和哒哒哒噪声的问题。

2024-7-16 17:31:09 评论举报陈秀英