#define BITS_PER_SAMPLE_8 8

#define WAVE_DUMMY_BYTE 0xA5

#define DAC_DHR8R1_Address                              0x40007410

#define BUFFER_SIZE                                                 1024

 __IO uint16_t TIM6ARRValue = 1088;

uint32_t WaveDataLength = 13144;

uint32_t ReadOffset;

uint8_t Wavebuffer[BUFFER_SIZE];

//uint8_t Wavebuffer2[512];

#define SAMPLE_RATE_8000 8000

#define SAMPLE_RATE_11025 11025

#define SAMPLE_RATE_16000                                     16000

#define SAMPLE_RATE_22050 22050

#define SAMPLE_RATE_44100 44100

#define SAMPLE_RATE_48000                                     48000

extern const unsigned char AnsiChar[];

u16 GetARRValue(u16 sample)

{

    u16 arrValue;

    //??OCA????.WAV?????

    switch (sample)

    {

                case SAMPLE_RATE_8000 :

                        arrValue = (u16)(72000000/8000);

                        break; // 8KHz = 2x36MHz / 9000

                case SAMPLE_RATE_11025:

                        arrValue = (u16)(72000000/11025);

                        break; // 11.025KHz = 2x36MHz / 6531

                case SAMPLE_RATE_16000:

                         arrValue = (u16)(7000000/16000);

                        break; // 16KHz = 2x36MHz / 4500

                case SAMPLE_RATE_22050:

                        arrValue = (u16)(72000000/22050);

                        break; // 22.05KHz = 2x36MHz / 2365

                case SAMPLE_RATE_44100:

                        arrValue = (u16)(72000000/44100);

                        break; // 44.1KHz = 2x36MHz / 1633

                case SAMPLE_RATE_48000:

                        arrValue = (u16)(72000000/48000);

                        break; // 48KHz = 2x36MHz / 1500

                default:

                        arrValue = 0;

                        break;

    }

    return arrValue;

}

void WavRCCConfiguration(void)

{

  //SystemInit();

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO|RCC_APB2Periph_GPIOA, ENABLE);

    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE);

}

void WavGPIOConfiguration(void)

{

  GPIO_InitTypeDef GPIO_InitStructure;

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;

    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;

  GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_SetBits(GPIOA,GPIO_Pin_4);//PA.4 ???

}

void WavTimerConfiguration(void)

{

     TIM_DeInit(TIM6);

     TIM6ARRValue = GetARRValue(SAMPLE_RATE_8000);

   TIM_SetAutoreload(TIM6, TIM6ARRValue); //TIM6ARRValue???72000000/22050

   TIM_SelectOutputTrigger(TIM6, TIM_TRGOSource_Update);

   //TIM_Cmd(TIM6, ENABLE);

     TIM_Cmd(TIM6, DISABLE);

//     TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

//    

//     TIM_DeInit(TIM6);

// TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);

// TIM_TimeBaseStructure.TIM_Period = GetARRValue(SAMPLE_RATE_8000);//72MHz ?CPU,??44.1KHz ???,?????1633

// TIM_TimeBaseStructure.TIM_Prescaler = 0;

// TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;

// TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

// TIM_TimeBaseInit(TIM6, &TIM_TimeBaseStructure);

// // TIM8 TRGO selection

// TIM_SelectOutputTrigger(TIM6, TIM_TRGOSource_Update);

}

void WavDACConfiguration(void)

{

    DAC_InitTypeDef DAC_InitStructure;

    DAC_DeInit();

  DAC_StructInit(&DAC_InitStructure);

  DAC_InitStructure.DAC_Trigger = DAC_Trigger_T6_TRGO;

    DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bit0;//?¨??·??ú?÷????

  DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;

  DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable; //DAC_OutputBuffer_Enable(?ù???ó???à)

  DAC_Init(DAC_Channel_1, &DAC_InitStructure);

    DAC_SetChannel1Data(DAC_Align_8b_R, 0); //jon ??????

  DAC_Cmd(DAC_Channel_1, ENABLE);

  DAC_DMACmd(DAC_Channel_1, ENABLE);

}

void WavNVICConfiguration(void)

{

  NVIC_InitTypeDef NVIC_InitStructure;

     /* Enable the TIM6 Interrupt */

// NVIC_InitStructure.NVIC_IRQChannel = TIM6_IRQn;

// NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

// NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;

// NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

// NVIC_Init(&NVIC_InitStructure);

//    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

  /* Enable the DMA1_Channel3 Interrupt */

  NVIC_InitStructure.NVIC_IRQChannel = DMA2_Channel3_IRQn;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

}

void WavDMAConfiguration(void)

{

    DMA_InitTypeDef DMA_InitStructure;

    DMA_DeInit(DMA2_Channel3);

  DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR8R1_Address;

  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&AnsiChar[44];//(uint32_t)&Wavebuffer; //

  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;

  DMA_InitStructure.DMA_BufferSize = (9550-44);//BUFFER_SIZE; //

    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;

  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;

  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;

  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;

  DMA_InitStructure.DMA_Priority = DMA_Priority_High;

  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

  DMA_Init(DMA2_Channel3, &DMA_InitStructure);

  DMA_Cmd(DMA2_Channel3, ENABLE);

    DMA_ITConfig(DMA2_Channel3, DMA_IT_TC | DMA_IT_HT, ENABLE);

}

void waveplaydma(int len)

{

    DMA_InitTypeDef DMA_InitStructure;

    DMA_DeInit(DMA2_Channel3);

  DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR8R1_Address;

  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&AnsiChar[44];//(uint32_t)&Wavebuffer; //

  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;

  DMA_InitStructure.DMA_BufferSize = len;//BUFFER_SIZE; //

    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;

  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;

  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;

  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;

  DMA_InitStructure.DMA_Priority = DMA_Priority_High;

  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

  DMA_Init(DMA2_Channel3, &DMA_InitStructure);

  DMA_Cmd(DMA2_Channel3, ENABLE);

    DMA_ITConfig(DMA2_Channel3, DMA_IT_TC | DMA_IT_HT, ENABLE);

}

void WavePlayer_Init(void)

{

        WavRCCConfiguration();

     WavNVICConfiguration();

        WavGPIOConfiguration();

        WavDACConfiguration();

        WavDMAConfiguration();

        WavTimerConfiguration();

}

int PlayFlg=0;

int PlayPingPong=0;

void WavPlayerStop(void)

{

    //DMA_ITConfig(DMA2_Channel3, DMA_IT_TC | DMA_IT_HT, DISABLE);

    ReadOffset = 0;

    WaveDataLength = 0;

    PlayFlg = 0;

    TIM_ITConfig(TIM6, TIM_IT_Update, DISABLE);

    DMA_Cmd(DMA2_Channel3, DISABLE);

    TIM_Cmd(TIM6, DISABLE);

    TIM_ClearITPendingBit(TIM6, TIM_IT_Update);

    DMA_ClearITPendingBit(DMA2_IT_HT3|DMA2_IT_TC3);

}

void PlayReadBlock(int offset)

{

        int i=0;

     int EndByte=WaveDataLength-ReadOffset;

     if(EndByte<512) //?á??

        {

                WavPlayerStop();

//            WaveDataLength = 0;

//            ReadOffset = 0;

  //            WavePlayer_Start(1);