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最近我在用 STM32F207VET6 (100pin)开发一个项目,主要是用到I2S 接口读取音频数据,但是STM32 I2S DMA始终无法进入接收中断,希望大神能帮忙看下,指导指导。
其中,STM32F207是从机,音频芯片是主机,音频芯片这边有信号输出,其中CLK为1.576MHz,采用频率为48KHz,16位数据长度,I2S标准模式,I2S_OUT有数据输出,示波器上能抓取。
硬件接口如下:
file:///C:/Users/zhajin/AppData/Roaming/Foxmail7/Temp-8520-20170626085730/Attach/Catch(07-04-09-29-44).jpg
代码如下:
- #include "AUDIO.h"
- #define AUDIO_DAP_REG_OFFSET 0x0100
- #define AUDIO_MAX_REG_OFFSET 0x013A
- #define CODEC_I2S SPI3
- #define CODEC_I2S_GPIO_CLOCK (RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOC)
- #define CODEC_I2S_CLK RCC_APB1Periph_SPI3
- #define CODEC_I2S_GPIO_AF GPIO_AF_SPI3
- #define CODEC_I2S_WS_PIN GPIO_Pin_4
- #define CODEC_I2S_SCK_PIN GPIO_Pin_10
- #define CODEC_I2S_SD_PIN GPIO_Pin_12
- #define CODEC_I2S_WS_PINSRC GPIO_PinSource4
- #define CODEC_I2S_SCK_PINSRC GPIO_PinSource10
- #define CODEC_I2S_SD_PINSRC GPIO_PinSource12
- #define CODEC_I2S_WS_GPIO GPIOA
- #define CODEC_I2S_GPIO GPIOC
- #define AUDIO_MAL_DMA_STREAM DMA1_Stream2
- #define AUDIO_MAL_DMA_CHANNEL DMA_Channel_0
- #define I2S_DMA_ENABLE 1//使能DMA接收
- /**
- * @brief Initializes IOs used by the Audio Codec (on the control and audio
- * interfaces).
- * @param None
- * @retval None
- */
- static void AUDIO_GPIO_I2S_Init(void)
- {
- GPIO_InitTypeDef GPIO_InitStructure;
- RCC_I2SCLKConfig(RCC_I2S2CLKSource_Ext);
- /* Enable I2S and I2C GPIO clocks */
- RCC_AHB1PeriphClockCmd(CODEC_I2S_GPIO_CLOCK, ENABLE);
- /* CODEC_I2S pins configuration: WS, SCK and SD pins -----------------------------*/
- GPIO_InitStructure.GPIO_Pin = CODEC_I2S_WS_PIN;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//GPIO_Mode_IN;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
- GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
- GPIO_Init(CODEC_I2S_WS_GPIO, &GPIO_InitStructure);
- GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
- GPIO_InitStructure.GPIO_Pin = CODEC_I2S_SD_PIN;
- GPIO_Init(CODEC_I2S_GPIO, &GPIO_InitStructure);
- GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//GPIO_PuPd_NOPULL;//;
- GPIO_InitStructure.GPIO_Pin = CODEC_I2S_SCK_PIN;
- GPIO_Init(CODEC_I2S_GPIO, &GPIO_InitStructure);
- /* Connect pins to I2S peripheral */
- GPIO_PinAFConfig(CODEC_I2S_WS_GPIO, CODEC_I2S_WS_PINSRC, CODEC_I2S_GPIO_AF);
- GPIO_PinAFConfig(CODEC_I2S_GPIO, CODEC_I2S_SCK_PINSRC, CODEC_I2S_GPIO_AF);
- GPIO_PinAFConfig(CODEC_I2S_GPIO, CODEC_I2S_SD_PINSRC, CODEC_I2S_GPIO_AF);
- }
- static void AUDIO_I2S_PRI_Init(uint32_t AudioFreq)
- {
- I2S_InitTypeDef I2S_InitStructure;
- /* Enable the CODEC_I2S peripheral clock */
- RCC_APB1PeriphClockCmd(CODEC_I2S_CLK, ENABLE);
- /* CODEC_I2S peripheral configuration */
- SPI_I2S_DeInit(CODEC_I2S);
- I2S_InitStructure.I2S_AudioFreq = AudioFreq;
- I2S_InitStructure.I2S_Standard = I2S_Standard_Phillips;//I2S_Standard_Phillips;;
- I2S_InitStructure.I2S_DataFormat = I2S_DataFormat_16b;//I2S_DataFormat_24b;
- I2S_InitStructure.I2S_CPOL = I2S_CPOL_Low;
- I2S_InitStructure.I2S_Mode = I2S_Mode_SlaveRx;//I2S_Mode_MasterRx;
- I2S_InitStructure.I2S_MCLKOutput = I2S_MCLKOutput_Disable; /* 外部晶振直接提供 */
- I2S_Init(CODEC_I2S, &I2S_InitStructure);
- #if I2S_DMA_ENABLE
- #else
- SPI_I2S_ITConfig(CODEC_I2S, SPI_I2S_IT_RXNE, ENABLE);
- #endif
- I2S_Cmd(CODEC_I2S, ENABLE);
- }
- uint8_t dmaRxBuf[1024];
- static void AUDIO_I2S_DMA_Init(void)
- {
- NVIC_InitTypeDef NVIC_InitStructure;
- #if I2S_DMA_ENABLE
- DMA_InitTypeDef DMA_InitStructure;
- RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1,ENABLE); //DMA1时钟使能
- //DMA_Cmd(AUDIO_MAL_DMA_STREAM, DISABLE);
- //DMA_DeInit(AUDIO_MAL_DMA_STREAM);
- DMA_DeInit(AUDIO_MAL_DMA_STREAM);
- while (DMA_GetCmdStatus(AUDIO_MAL_DMA_STREAM) != DISABLE){}//等待DMA1_Stream3可配置
- DMA_ClearITPendingBit(AUDIO_MAL_DMA_STREAM, DMA_IT_FEIF2|DMA_IT_DMEIF2|DMA_IT_TEIF2|DMA_IT_HTIF2|DMA_IT_TCIF2);//清空DMA1_Stream3上所有中断标志
- /* 配置 DMA Stream */
- DMA_InitStructure.DMA_Channel = AUDIO_MAL_DMA_CHANNEL; //通道0 SPI2_TX通道
- DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&CODEC_I2S->DR; //外设地址为:(u32)&SPI2->DR
- DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)dmaRxBuf; //DMA 存储器0地址
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory; //外设到存储器模式
- DMA_InitStructure.DMA_BufferSize = (uint32_t)0xFFFE; //数据传输量
- DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设非增量模式
- DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //存储器增量模式
- DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //外设数据长度:16位
- DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //存储器数据长度:16位
- DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;//DMA_Mode_Circular; // 使用循环模式
- DMA_InitStructure.DMA_Priority = DMA_Priority_High; //高优先级
- DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable; //不使用FIFO模式
- DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_1QuarterFull;
- DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; //外设突发单次传输
- DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; //存储器突发单次传输
- DMA_Init(AUDIO_MAL_DMA_STREAM, &DMA_InitStructure); //初始化DMA Stream
- //DMA_DoubleBufferModeConfig(AUDIO_MAL_DMA_STREAM,(u32)buf1, DMA_Memory_0); //双缓冲模式配置
- //DMA_DoubleBufferModeCmd(AUDIO_MAL_DMA_STREAM,ENABLE); //双缓冲模式开启
- DMA_ITConfig(AUDIO_MAL_DMA_STREAM, DMA_IT_TC, ENABLE); //SPI_I2S_IT_RXNE //开启传输完成中断
- SPI_I2S_DMACmd(CODEC_I2S, SPI_I2S_DMAReq_Rx, ENABLE);
- #endif
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
- #if I2S_DMA_ENABLE
- NVIC_InitStructure.NVIC_IRQChannel = DMA1_Stream2_IRQn;
- #else
- NVIC_InitStructure.NVIC_IRQChannel = SPI3_IRQn;
- #endif
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00; //抢占优先级0
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00; //子优先级0
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
- NVIC_Init(&NVIC_InitStructure); //配置
- }
- #if I2S_DMA_ENABLE
- void DMA1_Stream2_IRQHandler(void)
- {
- if(DMA_GetITStatus(AUDIO_MAL_DMA_STREAM, DMA_IT_TCIF2) == SET) //DMA1_Stream2,传输完成标志
- {
- DMA_ClearITPendingBit(AUDIO_MAL_DMA_STREAM, DMA_IT_TCIF2);
- }
- }
- #else
- void SPI3_IRQHandler(void)
- {
- if(SPI_GetITStatus(CODEC_I2S, SPI_I2S_IT_RXNE) == SET) //DMA1_Stream2,传输完成标志
- {
- SPI_ClearITPendingBit(CODEC_I2S, SPI_I2S_IT_RXNE);
- }
- }
- #endif
- s32 AUDIO_Interface_Init(void)
- {
- AUDIO_GPIO_I2C_Init();
- AUDIO_GPIO_I2S_Init();
- AUDIO_I2S_PRI_Init(I2S_AudioFreq_48k);
- AUDIO_I2S_DMA_Init();
- return 0;
- }
- s32 AUDIO_Init(void)
- {
- AUDIO_Interface_Init();
- return 0;
- }
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