i2s MCK

[icycal]

Hi:

  I use the PCA1004 EVK bord to configuer the I2S MCK as 256K, 32MHz/125 (I2S_CONFIG_MCK_SETUP 34340864) .

then I measure the pin use oscilloscope, but I only get 255K.  what happened for it.  the crystal oscillator error?

Thanks

By Gu Yahui

[Turbo J]

This error is less than one percent. Did you calibrate your oscilloscope?

[icycal]

Hi Turbo:

 Thanks for your reply, I use the Tektronix's multimeter to measure and get the same result, and also I use the MCK(configure to 16M) as a codec's reference to produce a 8K audio data, then I count the frequency use software, and get the value less than 8K

[icycal]

Hi :

  This problem is fixed, the cause is the source of the  HFCLK ,

nordic use the  HFINT as defualt, and it works ok when I switch to the  HFXO use nrf_drv_clock_hfclk_request()