CC2640: I2S

Hi,

We are working on making a example for exactly what you want. It will take couple of weeks till it's ready on our github :

For now, you can try to use our pdm driver in TI-RTOS(PDMCC26XX_util.c) and then modify the parameters to whatever you need.

    /* Initialize the I2S object */
    object->requestMode                 = params->requestMode;
    object->ui32requestTimeout          = params->ui32requestTimeout;
    object->blockSize                   = params->blockSize;
    object->pvContBuffer                = params->pvContBuffer;
    object->ui32conBufTotalSize         = params->ui32conBufTotalSize;
    object->pvContMgtBuffer             = params->pvContMgtBuffer;
    object->ui32conMgtBufTotalSize      = params->ui32conMgtBufTotalSize;
    object->currentStream               = params->currentStream;
    object->currentStream->status       = PDMCC26XX_I2S_STREAM_IDLE;

    /* The following are constants that apply to PDM */
    object->i32SampleRate = -1;                                                  /* If negative then use user configured clock division */
    object->audioClkCfg.wclkDiv = 16;                                            /* I2S Word Clock divider override*/
    object->audioClkCfg.sampleOnPositiveEdge = PDMCC26XX_I2S_SampleEdge_Postive; /* I2S Sample Edge */
    object->audioClkCfg.wclkPhase = PDMCC26XX_I2S_WordClockPhase_Dual;           /* I2S Word Clock Phase */
    object->audioClkCfg.wclkInverted = PDMCC26XX_I2S_ClockSource_Normal;         /* I2S Invert Word Clock */
    object->audioClkCfg.wclkSource = PDMCC26XX_I2S_WordClockSource_Int;          /* I2S Word Clock source */
    object->audioClkCfg.bclkDiv = 47;                                            /* I2S Bit Clock divider override */
    object->audioClkCfg.reserved = 0;
    object->audioClkCfg.bclkSource = PDMCC26XX_I2S_BitClockSource_Int;           /* I2S Bit Clock source */
    object->audioClkCfg.mclkDiv = 6;                                             /* I2S Master Clock divider override */

    object->audioPinCfg.bitFields.ad1Usage = PDMCC26XX_I2S_ADUsageDisabled;      /* I2S AD1 usage (0: Disabled, 1: Input, 2: Output) */
    object->audioPinCfg.bitFields.enableMclkPin = PDMCC26XX_I2S_GENERIC_DISABLED;/* I2S Enable Master clock output on pin */
    object->audioPinCfg.bitFields.reserved = 0;
    object->audioPinCfg.bitFields.ad1NumOfChannels = 0;                          /* I2S AD1 number of channels (1 - 8). !Must match channel mask */
    object->audioPinCfg.bitFields.ad1ChannelMask = PDMCC26XX_I2S_DISABLED_MODE;  /* I2S AD1 Channel Mask */
    object->audioPinCfg.bitFields.ad0Usage = PDMCC26XX_I2S_ADUsageInput;         /* I2S AD0 usage (0: Disabled, 1: Input, 2: Output) */
    object->audioPinCfg.bitFields.enableWclkPin = PDMCC26XX_I2S_GENERIC_DISABLED;/* I2S Enable Word clock output on pin */
    object->audioPinCfg.bitFields.enableBclkPin = PDMCC26XX_I2S_GENERIC_ENABLED; /* I2S Enable Bit clock output on pin */
    object->audioPinCfg.bitFields.ad0NumOfChannels = 2;                          /* I2S AD0 number of channels (1 - 8). !Must match channel mask. \sa PDM_NUM_OF_CHANNELS */
    object->audioPinCfg.bitFields.ad0ChannelMask = PDMCC26XX_I2S_STEREO_MODE;    /* I2S AD0 Channel Mask */

    object->audioFmtCfg.wordLength = PDMCC26XX_I2S_WordLength16;                 /* Number of bits per word (8-24). Exact for single phase, max for dual phase */
    object->audioFmtCfg.sampleEdge = PDMCC26XX_I2S_PositiveEdge;                 /* Data and Word clock is samples, and clocked out, on opposite edges of BCLK */
    object->audioFmtCfg.dualPhase = PDMCC26XX_I2S_SinglePhase;                   /* Selects dual- or single phase format (0: Single, 1: Dual) */
    object->audioFmtCfg.memLen = PDMCC26XX_I2S_MemLen16bit;                      /* Size of each word stored to or loaded from memory (0: 16, 1: 24) */
    object->audioFmtCfg.dataDelay = PDMCC26XX_I2S_FormatLJF;                     /* Number of BCLK perids between a WCLK edge and MSB of the first word in a phase */

HI Christin Lee,

I was also working on the same, but i din got how to configure and use the code given in Github, can u please help me on this, 

Hi Christin ,

Can i generate clock from master i,e from CC2640 by using PDM driver? ,Its not understanding from me . I could not Generate master clock and word clock. please help me out. I can say i am new to I2S. Please help me out for beginners.

Hi christin,

       Any update on above topic,Can we get I2S driver in deoxygen ?