[问答]

1 SAI_A做master TX发送8 slot数据，为什么会出现0数据的情况？

问答对人有帮助，内容完整，我也想知道答案 0 测试1 SAI_A做master TX，发送8 slot数据，产生时钟的同时会发送数据出来：测试2 SAI_A做master RX，发送8 slot数据，SAI_B做slave TX且和A同步，B经过示波器抓取波形如下：可以看到，红框内第一个slot数据为0。在前面有时钟的地方，有几帧都是0数据。不知道这是配置问题还是原始设计如此？附加代码： #define USE_ANALOG_CHIP #define SAI_AUDIO_IN_SLOT 8 #define SAI_AUDIO_OUT_SLOT 8 #define SAI_AUDIO_SAMPLING_FREQUENCY 48000 #define SAI_AUDIO_IN_BUF_LEN (SAI_AUDIO_SAMPLING_FREQUENCY/1000 * SAI_AUDIO_IN_SLOT * N_MS2) //16ms data #define SAI_AUDIO_OUT_BUF_LEN (SAI_AUDIO_SAMPLING_FREQUENCY/1000 SAI_AUDIO_OUT_SLOT * N_MS2) //16ms data / * SAI1用来和A2B通信，根据连线图其中Block A作为rx，Block B作为tx * SAI3用来和AD1938通信，根据连线图其中Block A作为rx，Block B作为tx * 所以，可以通过用宏分开的方式，同时配置SAI1和SAI3，实现代码的复用 * * 上行需要传8路音频数据，目前是初步保持和原始Final_OUT_Buff相同顺序，前4路mic原始数据+后4路纯净数据。 * -其中A2B要求slot宽度为32bit * 下行是回声消除数据，之前只需要2路，文斌建议预留4路~8路供以后算法扩展。 / SAI_HandleTypeDef SaiHandle_A_RX; DMA_HandleTypeDef hSaiDma_A; SAI_HandleTypeDef SaiHandle_B_TX; DMA_HandleTypeDef hSaiDma_B; static int16_t SAIBuffer_A[SAI_AUDIO_IN_BUF_LEN] __attribute__((section(".data_DMA"))); static uint16_t SAIBuffer_B[SAI_AUDIO_OUT_BUF_LEN] __attribute__((section(".data_DMA"))); static int16_t SAI_RX_Data_8ms[SAI_AUDIO_IN_BUF_LEN/2]; static int16_t SAI_TX_Data_8ms[SAI_AUDIO_OUT_BUF_LEN/2]; void hxd_SAI_CLK_Config(void) { RCC_PeriphCLKInitTypeDef RCC_PeriphCLKInitStruct; / 16/196/125=12.288M / RCC_PeriphCLKInitStruct.PLL2.PLL2M = 1; RCC_PeriphCLKInitStruct.PLL2.PLL2N = 96; RCC_PeriphCLKInitStruct.PLL2.PLL2P = 125; RCC_PeriphCLKInitStruct.PLL2.PLL2Q = 1; RCC_PeriphCLKInitStruct.PLL2.PLL2R = 1; RCC_PeriphCLKInitStruct.PLL2.PLL2RGE = RCC_PLL2VCIRANGE_3; // 这里能保证PLL2输出的频率范围是8MHz到16MHz之间，否则12.288M配不上去 RCC_PeriphCLKInitStruct.PLL2.PLL2VCOSEL = 0; RCC_PeriphCLKInitStruct.PeriphClockSelection = RCC_PERIPHCLK_SAI3; RCC_PeriphCLKInitStruct.Sai23ClockSelection = RCC_SAI23CLKSOURCE_PLL2; if(HAL_RCCEx_PeriphCLKConfig( RCC_PeriphCLKInitStruct) != HAL_OK) { Error_Handler(); } } void hxd_SAI_A_RX_Init(void) { /* Initialize SAI / __HAL_SAI_RESET_HANDLE_STATE( SaiHandle_A_RX); #ifndef USE_ANALOG_CHIP SaiHandle_A_RX.Instance = SAI1_Block_A; SaiHandle_A_RX.Init.AudioMode = SAI_MODEMASTER_RX; #else SaiHandle_A_RX.Instance = SAI3_Block_A; SaiHandle_A_RX.Init.AudioMode = SAI_MODEMASTER_RX; #endif __HAL_SAI_DISABLE( SaiHandle_A_RX); SaiHandle_A_RX.Init.Synchro = SAI_ASYNCHRONOUS; SaiHandle_A_RX.Init.OutputDrive = SAI_OUTPUTDRIVE_DISABLE;//SAI_OUTPUTDRIVE_ENABLE; SaiHandle_A_RX.Init.NoDivider = SAI_MASTERDIVIDER_DISABLE; // 禁用主时钟 SaiHandle_A_RX.Init.FIFOThreshold = SAI_FIFOTHRESHOLD_1QF; // 配置为1/4的FIFO深度 SaiHandle_A_RX.Init.AudioFrequency = SAI_AUDIO_FREQUENCY_48K; //SAI_AUDIO_FREQUENCY_16K; SaiHandle_A_RX.Init.Protocol = SAI_FREE_PROTOCOL; // 配置SAI协议为:自由协议(支持I2S/LSB/MSB/TDM/PCM/DSP等协议) SaiHandle_A_RX.Init.DataSize = SAI_DATASIZE_16; // 采样深度 SaiHandle_A_RX.Init.FirstBit = SAI_FIRSTBIT_MSB; // 数据MSB位优先 SaiHandle_A_RX.Init.ClockStrobing = SAI_CLOCKSTROBING_RISINGEDGE; / 为了得到相同的上升沿采样，这里TX和RX的值应该是相反的。对RX来说，在SCK下降沿更改SAI生成的信号，而在SCK上升沿对SAI接收的信号进行采样 / SaiHandle_A_RX.FrameInit.FrameLength = 32 8; // 表示所有slot需要的位时钟总数 SaiHandle_A_RX.FrameInit.ActiveFrameLength = 1; // 表示长帧同步还是短帧同步，长帧的话，需要配置成slot位宽，短帧则配置成1 SaiHandle_A_RX.FrameInit.FSDefinition = SAI_FS_STARTFRAME; //SAI_FS_CHANNEL_IDENTIFICATION; SaiHandle_A_RX.FrameInit.FSPolarity = SAI_FS_ACTIVE_HIGH; //SAI_FS_ACTIVE_LOW; SaiHandle_A_RX.FrameInit.FSOffset = SAI_FS_BEFOREFIRSTBIT; // PHILIPS SaiHandle_A_RX.SlotInit.FirstBitOffset = 0; SaiHandle_A_RX.SlotInit.SlotSize = SAI_SLOTSIZE_32B; SaiHandle_A_RX.SlotInit.SlotNumber = 8; // SaiHandle_A_RX.SlotInit.SlotActive = (SAI_SLOTACTIVE_0 \| SAI_SLOTACTIVE_1); // 这里8路slot只取前2路数据 // SaiHandle_A_RX.SlotInit.SlotActive = (SAI_SLOTACTIVE_0 \| SAI_SLOTACTIVE_1 \| SAI_SLOTACTIVE_2 \| SAI_SLOTACTIVE_3); SaiHandle_A_RX.SlotInit.SlotActive = (SAI_SLOTACTIVE_0 \| SAI_SLOTACTIVE_1 \| SAI_SLOTACTIVE_2 \| SAI_SLOTACTIVE_3 \| SAI_SLOTACTIVE_4 \| SAI_SLOTACTIVE_5 \| SAI_SLOTACTIVE_6 \| SAI_SLOTACTIVE_7); if(HAL_OK != HAL_SAI_Init( SaiHandle_A_RX)) { Error_Handler(); } /* Enable SAI to generate clock used by audio driver / __HAL_SAI_ENABLE( SaiHandle_A_RX); } /* * @brief Play initialization * @param None * @retval None / void hxd_SAI_B_TX_Init(void) { / Initialize SAI / __HAL_SAI_RESET_HANDLE_STATE( SaiHandle_B_TX); #ifndef USE_ANALOG_CHIP SaiHandle_B_TX.Instance = SAI1_Block_B; #else SaiHandle_B_TX.Instance = SAI3_Block_B; #endif __HAL_SAI_DISABLE( SaiHandle_B_TX); SaiHandle_B_TX.Init.AudioMode = SAI_MODESLAVE_TX; SaiHandle_B_TX.Init.Synchro = SAI_SYNCHRONOUS; SaiHandle_B_TX.Init.OutputDrive = SAI_OUTPUTDRIVE_ENABLE; SaiHandle_B_TX.Init.NoDivider = SAI_MASTERDIVIDER_DISABLE; // 禁用主时钟 SaiHandle_B_TX.Init.FIFOThreshold = SAI_FIFOTHRESHOLD_1QF; // 配置为1/4的FIFO深度 SaiHandle_B_TX.Init.AudioFrequency = SAI_AUDIO_FREQUENCY_48K; //SAI_AUDIO_FREQUENCY_16K; SaiHandle_B_TX.Init.Protocol = SAI_FREE_PROTOCOL; // 配置SAI协议为:自由协议(支持I2S/LSB/MSB/TDM/PCM/DSP等协议) SaiHandle_B_TX.Init.DataSize = SAI_DATASIZE_16; // 采样深度 SaiHandle_B_TX.Init.FirstBit = SAI_FIRSTBIT_MSB; // 数据MSB位优先 SaiHandle_B_TX.Init.ClockStrobing = SAI_CLOCKSTROBING_RISINGEDGE;//SAI_CLOCKSTROBING_FALLINGEDGE; / 为了得到相同的上升沿采样，这里TX和RX的值应该是相反的。对TX来说，在SCK下降沿更改SAI生成的信号，而在SCK上升沿对SAI接收的信号进行采样 / SaiHandle_B_TX.FrameInit.FrameLength = 32 8; // 表示所有slot需要的位时钟总数 SaiHandle_B_TX.FrameInit.ActiveFrameLength = 1; // 表示长帧同步还是短帧同步，长帧的话，需要配置成slot位宽，短帧则配置成1 SaiHandle_B_TX.FrameInit.FSDefinition = SAI_FS_STARTFRAME; //SAI_FS_CHANNEL_IDENTIFICATION; SaiHandle_B_TX.FrameInit.FSPolarity = SAI_FS_ACTIVE_HIGH; //SAI_FS_ACTIVE_LOW; SaiHandle_B_TX.FrameInit.FSOffset = SAI_FS_FIRSTBIT;//SAI_FS_BEFOREFIRSTBIT; // PHILIPS SaiHandle_B_TX.SlotInit.FirstBitOffset = 0; // 这里暂时先取默认值，后面根据诚迈需要，再改成高16bit有效 SaiHandle_B_TX.SlotInit.SlotSize = SAI_SLOTSIZE_32B; SaiHandle_B_TX.SlotInit.SlotNumber = 8; SaiHandle_B_TX.SlotInit.SlotActive = (SAI_SLOTACTIVE_0 \| SAI_SLOTACTIVE_1 \| SAI_SLOTACTIVE_2 \| SAI_SLOTACTIVE_3 \| SAI_SLOTACTIVE_4 \| SAI_SLOTACTIVE_5 \| SAI_SLOTACTIVE_6 \| SAI_SLOTACTIVE_7); // SaiHandle_B_TX.SlotInit.SlotActive = (SAI_SLOTACTIVE_0 \| SAI_SLOTACTIVE_1 \| SAI_SLOTACTIVE_2 \| SAI_SLOTACTIVE_3); if(HAL_OK != HAL_SAI_Init( SaiHandle_B_TX)) { Error_Handler(); } /* Enable SAI to generate clock used by audio driver / __HAL_SAI_ENABLE( SaiHandle_B_TX); } /* * @brief SAI MSP Init. * @param hsai : pointer to a SAI_HandleTypeDef structure that contains * the configuration information for SAI module. * @retval None / void HAL_SAI_MspInit(SAI_HandleTypeDef hsai) { GPIO_InitTypeDef GPIO_Init; #ifndef USE_ANALOG_CHIP __HAL_RCC_SAI1_CLK_ENABLE(); #else __HAL_RCC_SAI3_CLK_ENABLE(); #endif if (hsai->Instance == SAI1_Block_A \|\| hsai->Instance == SAI3_Block_A) { #ifndef USE_ANALOG_CHIP /* Configure GPIOs used for SAI1_A * SAI1_FS_A -- PE4 * SAI1_SCK_A -- PE5 * SAI1_SD_A -- PE6 / __GPIOE_CLK_ENABLE(); GPIO_Init.Mode = GPIO_MODE_AF_PP; GPIO_Init.Pull = GPIO_NOPULL; GPIO_Init.Speed = GPIO_SPEED_FREQ_VERY_HIGH; GPIO_Init.Alternate = GPIO_AF6_SAI1; GPIO_Init.Pin = GPIO_PIN_4 \| GPIO_PIN_5 \| GPIO_PIN_6; HAL_GPIO_Init(GPIOE, GPIO_Init); #else / Configure GPIOs used for SAI3_A * SAI3_FS_A -- PD4 * SAI3_SCK_A -- PD0 * SAI3_SD_A -- PD1 / __GPIOD_CLK_ENABLE(); GPIO_Init.Mode = GPIO_MODE_AF_PP; GPIO_Init.Pull = GPIO_NOPULL; GPIO_Init.Speed = GPIO_SPEED_FREQ_VERY_HIGH; GPIO_Init.Alternate = GPIO_AF6_SAI3; GPIO_Init.Pin = GPIO_PIN_0 \| GPIO_PIN_1 \| GPIO_PIN_4; HAL_GPIO_Init(GPIOD, GPIO_Init); #endif / Configure DMA used for SAI1 / __HAL_RCC_DMA2_CLK_ENABLE(); #ifndef USE_ANALOG_CHIP hSaiDma_A.Init.Request = DMA_REQUEST_SAI1_A; #else hSaiDma_A.Init.Request = DMA_REQUEST_SAI3_A; #endif hSaiDma_A.Init.Direction = DMA_PERIPH_TO_MEMORY; hSaiDma_A.Init.PeriphInc = DMA_PINC_DISABLE; hSaiDma_A.Init.MemInc = DMA_MINC_ENABLE; hSaiDma_A.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD; hSaiDma_A.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD; hSaiDma_A.Init.Mode = DMA_CIRCULAR; hSaiDma_A.Init.Priority = DMA_PRIORITY_HIGH; hSaiDma_A.Init.FIFOMode = DMA_FIFOMODE_ENABLE; hSaiDma_A.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL; hSaiDma_A.Init.MemBurst = DMA_MBURST_SINGLE; hSaiDma_A.Init.PeriphBurst = DMA_PBURST_SINGLE; / Select the DMA instance to be used for the transfer : DMA2_Stream1 / hSaiDma_A.Instance = DMA2_Stream1; __HAL_LINKDMA(hsai, hdmarx, hSaiDma_A); / Deinitialize the Stream for new transfer / HAL_DMA_DeInit( hSaiDma_A); / Configure the DMA Stream / if (HAL_OK != HAL_DMA_Init( hSaiDma_A)) { Error_Handler(); } HAL_NVIC_SetPriority(DMA2_Stream1_IRQn, 0, 0); HAL_NVIC_EnableIRQ(DMA2_Stream1_IRQn); } if (hsai->Instance == SAI1_Block_B \|\| hsai->Instance == SAI3_Block_B) { #ifndef USE_ANALOG_CHIP / Configure GPIOs used for SAI1_B * SAI1_SD_B -- PE3 / __GPIOE_CLK_ENABLE(); GPIO_Init.Mode = GPIO_MODE_AF_PP; GPIO_Init.Pull = GPIO_NOPULL; GPIO_Init.Speed = GPIO_SPEED_FREQ_VERY_HIGH; GPIO_Init.Alternate = GPIO_AF6_SAI1; GPIO_Init.Pin = GPIO_PIN_3; HAL_GPIO_Init(GPIOE, GPIO_Init); #else / Configure GPIOs used for SAI3_B * SAI3_SD_B -- PD9 / __GPIOD_CLK_ENABLE(); GPIO_Init.Mode = GPIO_MODE_AF_PP; GPIO_Init.Pull = GPIO_NOPULL; GPIO_Init.Speed = GPIO_SPEED_FREQ_VERY_HIGH; GPIO_Init.Alternate = GPIO_AF6_SAI3; GPIO_Init.Pin = GPIO_PIN_9; HAL_GPIO_Init(GPIOD, GPIO_Init); #endif / Configure DMA used for SAI1 / __HAL_RCC_DMA2_CLK_ENABLE(); #ifndef USE_ANALOG_CHIP hSaiDma_B.Init.Request = DMA_REQUEST_SAI1_B; #else hSaiDma_B.Init.Request = DMA_REQUEST_SAI3_B; #endif hSaiDma_B.Init.Direction = DMA_MEMORY_TO_PERIPH; hSaiDma_B.Init.PeriphInc = DMA_PINC_DISABLE; hSaiDma_B.Init.MemInc = DMA_MINC_ENABLE; hSaiDma_B.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD; hSaiDma_B.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD; hSaiDma_B.Init.Mode = DMA_CIRCULAR; hSaiDma_B.Init.Priority = DMA_PRIORITY_HIGH; hSaiDma_B.Init.FIFOMode = DMA_FIFOMODE_ENABLE; hSaiDma_B.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL; hSaiDma_B.Init.MemBurst = DMA_MBURST_SINGLE; hSaiDma_B.Init.PeriphBurst = DMA_PBURST_SINGLE; / Select the DMA instance to be used for the transfer : DMA2_Stream2 / hSaiDma_B.Instance = DMA2_Stream2; / Associate the DMA handle / __HAL_LINKDMA(hsai, hdmatx, hSaiDma_B); / Deinitialize the Stream for new transfer / HAL_DMA_DeInit( hSaiDma_B); / Configure the DMA Stream / if (HAL_OK != HAL_DMA_Init( hSaiDma_B)) { Error_Handler(); } HAL_NVIC_SetPriority(DMA2_Stream2_IRQn, 0, 0); HAL_NVIC_EnableIRQ(DMA2_Stream2_IRQn); } } void hxd_SAI_start(void) { static int16_t val = 1; for (int i = 0; i < SAI_AUDIO_OUT_BUF_LEN / SAI_AUDIO_OUT_SLOT; i++) { SAIBuffer_B[iSAI_AUDIO_OUT_SLOT] = 0XFFFF;//val++; SAIBuffer_B[iSAI_AUDIO_OUT_SLOT + 1] = 0X3fff;//val++; SAIBuffer_B[iSAI_AUDIO_OUT_SLOT + 2] = 0xfff;//val++; SAIBuffer_B[iSAI_AUDIO_OUT_SLOT + 3] = 0x3ff;//val++; SAIBuffer_B[iSAI_AUDIO_OUT_SLOT + 4] = 0xff;//val++; SAIBuffer_B[iSAI_AUDIO_OUT_SLOT + 5] = 0x3f;//val++; SAIBuffer_B[iSAI_AUDIO_OUT_SLOT + 6] = 0xf;//val++; SAIBuffer_B[iSAI_AUDIO_OUT_SLOT + 7] = 0x3;//val++; } if(HAL_OK != HAL_SAI_Transmit( SaiHandle_B_TX, (uint8_t )SAIBuffer_B, SAI_AUDIO_OUT_BUF_LEN, 100)) { Error_Handler(); } if(HAL_OK != HAL_SAI_Receive_DMA( SaiHandle_A_RX, (uint8_t *)SAIBuffer_A, SAI_AUDIO_IN_BUF_LEN)) { Error_Handler(); } } 0 本主题由 Harmony技术专家于 2024-3-25 17:02 审核通过
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答案对人有帮助，有参考价值 0 SAI1_B作为slave TX发送8个slot 16bit数据，从现象上看产生时钟后有约4帧都没有数据，且第五帧数据的第一个slot也是0数据，后面才是填充到buffer里的0xFFFF

2024-3-25 16:14:38 评论举报王莉淳