AN4369: Audio options for Kinetis

Mohsin455 — Wed, 20 Jun 2012 18:19:50 GMT

Hi All,

Can anyone please provide me the link to the example code used in AN4369: Audio options for Kinetis ?

Regards,

Mohsin455

Re: AN4369: Audio options for Kinetis

J2MEJediMaster — Thu, 21 Jun 2012 20:03:36 GMT

Search by keyword can be your friend. Anyway, here's the link:

http://cache.freescale.com/files/32bit/doc/app_note/AN4369SW.zip

---Tom

Re: AN4369: Audio options for Kinetis

Mohsin455 — Sun, 24 Jun 2012 04:24:01 GMT

Thanks finally found it. I have a few questions regarding I2S example. I think the TCD is not set properly for I2S mode. See the code below for the code marked in red which is not used for I2S mode.

// fill the TCD area
DMA_TCD0_SADDR          = (uint32_t) Audio_Source_Blk_A ; // alternated with Audio_Source_Blk_B
DMA_TCD0_SOFF           = 2;                              // 2 byte offset
DMA_TCD0_ATTR           = DMA_ATTR_SMOD(0) | DMA_ATTR_SSIZE(1) | DMA_ATTR_DMOD(0) | DMA_ATTR_DSIZE(1);   // no circular addressing S&D, 16 bit S&D
DMA_TCD0_NBYTES_MLNO    = 2;                              // one 16bit sample every minor loop
DMA_TCD0_SLAST          = 0;//-(AUDIO_SIZE*2);         // source address will always be newly written before each new start DMA_TCD0_DADDR
#if (AUDIO_DMA_OUTPUT == USE_PWM)
DMA_TCD0_DADDR          = (uint32_t) &FTM2_C0V;    // the FTM Channel 0 duty value
#elif (AUDIO_DMA_OUTPUT == USE_I2S)
DMA_TCD0_DADDR          = (uint32_t) &I2S0_TX0;    // the FTM Channel 0 duty value
#elif (AUDIO_DMA_OUTPUT == USE_DAC)
DMA_TCD0_DADDR          = (uint32_t) &DAC0_DAT0L;    // the FTM Channel 0 duty value
DMA_TCD0_DOFF = 0;
DMA_TCD0_CITER_ELINKNO = AUDIO_SIZE;              // total samples ( 128 )
DMA_TCDO_DLASTSGA = 0;                       // no final last adjustment ( does not move )
DMA_TCD0_CSR = DMA_CSR_INTMAJOR_MASK; // interrupt when done
DMA_TCD0_BITER_ELINKNO = AUDIO_SIZE;              // no chan links, total samples ( 128)
#endif //DMA_OUTPUT

Can anyone please confirm if this is correct ?

Thanks,

Mohsin455

Re: AN4369: Audio options for Kinetis

ThomNet — Fri, 19 Jul 2013 07:13:52 GMT

Hi,

did anyone try with success to play a .wav file from an SD card directly using the AN4369 example?

Thanks for any response

Thomas

topic Re: AN4369: Audio options for Kinetis in Kinetis Microcontrollers

AN4369: Audio options for Kinetis

Re: AN4369: Audio options for Kinetis

Re: AN4369: Audio options for Kinetis

Re: AN4369: Audio options for Kinetis