i.MX Processorsのトピックssi can't generate bit clock

ssi can't generate bit clock

剑明廖 — Thu, 17 Sep 2015 13:06:05 GMT

I configure ssi1 as network mode,Frame Sync and Transmit Clock generated internally,and route it to AUD3,but I can't get clock on AUD3_TXC pin and AUD3_TXFS pin,who can help me?!!!!

Thanks in advance!!!

Is there any problem in this function?

//route ssi1 to AUD3

static int imx_audmux_config(int slave, int master)

{

int ret;

unsigned int ptcr, pdcr;

slave = slave - 1; //slave=3-1

master = master - 1; //master=1-1

ptcr = MXC_AUDMUX_V2_PTCR_SYN |

MXC_AUDMUX_V2_PTCR_TFSDIR |

MXC_AUDMUX_V2_PTCR_TFSEL(master) |

MXC_AUDMUX_V2_PTCR_TCLKDIR |

MXC_AUDMUX_V2_PTCR_TCSEL(master);

pdcr = MXC_AUDMUX_V2_PDCR_RXDSEL(master);

ret = mxc_audmux_v2_configure_port(slave, ptcr, pdcr);

ptcr = MXC_AUDMUX_V2_PTCR_SYN;

pdcr = MXC_AUDMUX_V2_PDCR_RXDSEL(slave);

ret = mxc_audmux_v2_configure_port(master, ptcr, pdcr);

return 0;

}

Re: ssi can't generate bit clock

剑明廖 — Mon, 21 Sep 2015 09:27:40 GMT

can any one help me?

Re: ssi can't generate bit clock

saurabh206 — Mon, 21 Sep 2015 10:35:02 GMT

Have you setup "snd_soc_dai_set_sysclk" correctly?

For SSI master mode you need to mentioned "SND_SOC_CLOCK_OUT"

ret = snd_soc_dai_set_sysclk(cpu_dai, 0, bclk, SND_SOC_CLOCK_OUT);

Thanks

Saurabh

Re: ssi can't generate bit clock

art — Tue, 22 Sep 2015 07:28:42 GMT

Actually, the code you listed here has no sense for me. As far as I understand, you are trying to configure the SSI1 interface to operate in master mode and to be routed out of the chip through AUD3 port. Am I right? Please clarify. Also, please specify, what exactly processor of i.MX series do you use to make me able to check the required configuration.

Have a great day,
Artur

Re: ssi can't generate bit clock

剑明廖 — Fri, 25 Sep 2015 03:17:20 GMT

Thank you very much!

Yes,you are right.And I use I.MX6Q processor.Please help me!

Re: ssi can't generate bit clock

剑明廖 — Fri, 25 Sep 2015 03:19:32 GMT

I am sure that I have configure the sysclk as SND_SOC_CLOCK_OUT,but it still not clock generare on aud3.

Please help me, thank you very much!