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#include "bsp.h"
#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
/**
* @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;
/* 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_NOPULL;
GPIO_Init(CODEC_I2S_WS_GPIO, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = CODEC_I2S_SCK_PIN | CODEC_I2S_SD_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_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_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);
I2S_Cmd(CODEC_I2S, ENABLE);
}
#define AUDIO_MAL_DMA_STREAM DMA1_Stream2
uint8_t dmaRxBuf[1024];
static void Audio_I2S_DMA_Init(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
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);
/* 配置 DMA Stream */
DMA_InitStructure.DMA_Channel = DMA_Channel_0; //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_Enable;//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);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Stream2_IRQn;
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
}
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);
}
}