CS47L63 Config for Line IN to Headphone OUT

[SohamGhugare]

So I was experimenting with the Hardware Codec and I created a simple config which redirects the audio coming from the LINE IN mic to HEADPHONE OUT speakers.

Here's the configuration:

const uint32_t line_in_to_headphone[][2] = {
	/* 
	GPIO 9 -> SPI CS
	GPIO 10 -> SPI CLK
	GPIO 11 -> SPI MISO
	GPIO 12 -> SPI MOSI
	*/
	{ CS47L63_GPIO9_CTRL1, 0xE1000000 },
	{ CS47L63_GPIO10_CTRL1, 0xE1000000 },
	{ CS47L63_GPIO11_CTRL1, 0xE1000000 },
	{ CS47L63_GPIO12_CTRL1, 0xE1000000 },

	/* CLK Config */
	{ CS47L63_OUTPUT_SYS_CLK, 0x8000 },
	{ CS47L63_OUTPUT_DSP_CLK, 0x0010 },

	/* SYS CLK Enable */
	{ CS47L63_SYSTEM_CLOCK1, 0x0444 },

	/* Sample Rate -> 192KHz */
	{ CS47L63_SAMPLE_RATE1, 0x0005 },

	/* Disable unused sample rates */
	{ CS47L63_SAMPLE_RATE2, 0 },
	{ CS47L63_SAMPLE_RATE3, 0 },
	{ CS47L63_SAMPLE_RATE4, 0 },

	/* FLL Config */
	{ CS47L63_FLL1_CONTROL1, 0x0001 },
	{ CS47L63_FLL1_CONTROL2, 0x28600177 },
	{ CS47L63_FLL1_CONTROL3, 0x10000 },
	{ CS47L63_FLL1_CONTROL4, 0x23F05004 },

	/* Line In Setup */
	{ CS47L63_INPUT_CONTROL, 0x000C },
	{ CS47L63_INPUT_CONTROL3, 0x20000000 },
	{ CS47L63_IN2L_CONTROL1, 0x10000004 },
	{ CS47L63_IN2L_CONTROL2, 0xBC0080 },
	{ CS47L63_IN2R_CONTROL1, 0x10000004 },
	{ CS47L63_IN2R_CONTROL2, 0xBC0080 },

	/* High pass filter */
	{ CS47L63_INPUT_HPF_CONTROL, 0x0001 },

	/* Output enable */
	{ CS47L63_OUTPUT_ENABLE_1, 0x0002 },
	{ CS47L63_OUT1L_VOLUME_1, 0x00BC },
	{ CS47L63_OUT1L_INPUT1, 0x800012 },
	{ CS47L63_OUT1L_INPUT2, 0x800013 },

	/* Digital core sample rate */
	{ CS47L63_FX_SAMPLE_RATE, 0x0800 },
};

However, nothing works as intended. There's no audio being streamed out of speakers.

One of my engineers in the hardware domain suggested me to look into the TRACECLK config as the hardware codec runs on some internal clock source. Is it internally setup or do I need to set it up myself? Also are there any corrections in the config file?

[SohamGhugare]

Update: I have updated the config to use the internal oscillator, but that doesn't seem to be working too. Here's the new config

const uint32_t line_in_to_headphone[][2] = {
	/* 
	GPIO 9 -> SPI CS
	GPIO 10 -> SPI CLK
	GPIO 11 -> SPI MISO
	GPIO 12 -> SPI MOSI
	*/
	{ CS47L63_GPIO9_CTRL1, 0xE1000000 },
	{ CS47L63_GPIO10_CTRL1, 0xE1000000 },
	{ CS47L63_GPIO11_CTRL1, 0xE1000000 },
	{ CS47L63_GPIO12_CTRL1, 0xE1000000 },

	/* CLK Config */
	{ CS47L63_OUTPUT_SYS_CLK, 0x8000 },
	{ CS47L63_OUTPUT_DSP_CLK, 0x0010 },

	/* SYS CLK Enable */
	// { CS47L63_SYSTEM_CLOCK1, 0x0442 },
	{ CS47L63_SYSTEM_CLOCK1, 0x0444 },
	{ CS47L63_RCO_CTRL1, 0x00000001 },  /* EN=1 */

	/* Sample Rate -> 192KHz */
	{ CS47L63_SAMPLE_RATE1, 0x0005 },

	/* Disable unused sample rates */
	{ CS47L63_SAMPLE_RATE2, 0 },
	{ CS47L63_SAMPLE_RATE3, 0 },
	{ CS47L63_SAMPLE_RATE4, 0 },

	/* FLL Config */
	// { CS47L63_FLL1_CONTROL1, 0x0001 },
	{ CS47L63_FLL1_CONTROL1, 0x0007 },
	// { CS47L63_FLL1_CONTROL2, 0x28602177 },
	{ CS47L63_FLL1_CONTROL2,     0x88202004 },  /* REFCLK_SRC=RCO */
	{ CS47L63_FLL1_CONTROL3, 0x10000 },
	{ CS47L63_FLL1_CONTROL4, 0x23F05004 },

	/* Line In Setup */
	{ CS47L63_INPUT_CONTROL, 0x000C },
	{ CS47L63_INPUT_CONTROL3, 0x20000000 },
	{ CS47L63_IN2L_CONTROL1, 0x10000004 },
	{ CS47L63_IN2L_CONTROL2, 0xB00080 },
	{ CS47L63_IN2R_CONTROL1, 0x10000004 },
	{ CS47L63_IN2R_CONTROL2, 0xB00080 },

	/* High pass filter */
	{ CS47L63_INPUT_HPF_CONTROL, 0x0001 },

	/* Output enable */
	{ CS47L63_OUTPUT_ENABLE_1, 0x0002 },
	{ CS47L63_OUT1L_VOLUME_1, 0x00B0 },
	{ CS47L63_OUT1L_INPUT1, 0x800012 },
	{ CS47L63_OUT1L_INPUT2, 0x800013 },

	/* Digital core sample rate */
	{ CS47L63_FX_SAMPLE_RATE, 0x0800 },
};

[Amanda Hsieh]

Hi, 

Here is an example of how to make this feature (Line-in wiring to headphone) works on BIS gateway. 

1. setup the I2S as audio source with add this configs in the prj.conf
CONFIG_AUDIO_SOURCE_I2S=y

2. Add one more configs in the following line:
https://github.com/nrfconnect/sdk-nrf/blob/763c3368ddf2c080acb4efcc23f9be7b12a16eb9/applications/nrf5340_audio/src/drivers/cs47l63_reg_conf.h#L108

const uint32_t output_enable[][2] = {
    { CS47L63_OUTPUT_ENABLE_1, 0x0002 },
    { CS47L63_OUT1L_INPUT1, 0x800020 },
    { CS47L63_OUT1L_INPUT2, 0x800021 },
   + { CS47L63_OUT1L_INPUT3, 0x800012},
    +{ CS47L63_OUT1L_INPUT4, 0x800013},
};

And then the audio stream to line-in can also be heard from the headphone 3.5mm audio jack. 

You also could try the GUI tool https://www.cirrus.com/support/wisce/ for help. 

Since CS47L63 is developed by CirrusLogic instead of Nordic, please contact https://www.cirrus.com/company/contacts/ if you need further support. 

Regards,
Amanda H.

[SohamGhugare]

Amanda Hsieh said:

CONFIG_AUDIO_SOURCE_I2S=y

I dont think any such config symbol exists. It SDK itself gives me unknown symbol warning for that config anyways.

Amanda Hsieh said:

Add one more configs in the following line:

Tried that already, didn't work at all. 

All I need is a config which connects the microphone connected to the LINE IN jack to the speakers connected to HEADPHONE jack. 

Amanda Hsieh said:

Since CS47L63 is developed by CirrusLogic instead of Nordic, please contact https://www.cirrus.com/company/contacts/ if you need further support. 

Tried that already, the CirrusLogic team is quite slow at replying. I assume there are a couple of developers here already working on the hardware codec and thats the reason why I found it relevant to post it here.

Thanks,

Soham

[Amanda Hsieh]

SohamGhugare said:

I dont think any such config symbol exists. It SDK itself gives me unknown symbol warning for that config anyways.

The config is supported in v2.6.1. See https://docs.nordicsemi.com/bundle/ncs-2.6.1/page/nrf/applications/nrf5340_audio/doc/configuration.html 

What NCS version are you using? Please use the latest version, v.2.6.1. If you are using v 2.6.1 and still have the issue, please update the SDK via ToolChain Manager.  

-Amanda H.

[ace.johnny]

You don't need to update the SDK. You don't need the nrf5340_audio app at all. You need to read the CS47L63 datasheet.

Not only is much of your attempt misguided, your order of operations is incorrect. Configure first, enable last, especially clocks.

Here's the minimum stand-alone config needed to route line-in to headphone out:

static const uint32_t cs47l63_cfg[][2] =
{
	/* Configure clocks to use internal oscillator */
	{ CS47L63_RCO_CTRL1,            0x00000001 },   /* EN=1 */
	{ CS47L63_FLL1_CONTROL4,        0x21F05001 },   /* defaults */
	{ CS47L63_FLL1_CONTROL3,        0x00010000 },   /* LAMBDA=1 */
	{ CS47L63_FLL1_CONTROL2,        0x88202004 },   /* REFCLK_SRC=RCO */
	{ CS47L63_FLL1_CONTROL1,        0x00000003 },   /* EN=1, HOLD=1 */
	{ CS47L63_SYSTEM_CLOCK1,        0x00000444 },   /* EN=1 */

	/* Configure IN2 as single-ended analog line-in */
	{ CS47L63_INPUT2_CONTROL1,      0x00050020 },   /* MODE=analog */
	{ CS47L63_IN2L_CONTROL1,        0x10000000 },   /* SRC=IN2LP */
	{ CS47L63_IN2R_CONTROL1,        0x10000000 },   /* SRC=IN2RP */
	{ CS47L63_INPUT_CONTROL,        0x0000000C },   /* IN2_EN=1 */

	/* Set IN2 volume */
	{ CS47L63_IN2L_CONTROL2,        0x00800080 },   /* VOL=0dB, MUTE=0 */
	{ CS47L63_IN2R_CONTROL2,        0x00800080 },   /* VOL=0dB, MUTE=0 */
	{ CS47L63_INPUT_CONTROL3,       0x20000000 },   /* VU=1 */

	/* Configure output to play IN2 */
	{ CS47L63_OUT1L_INPUT1,         0x00800012 },   /* SRC=IN2L */
	{ CS47L63_OUT1L_INPUT2,         0x00800013 },   /* SRC=IN2R */
	{ CS47L63_OUT1L_VOLUME_1,       0x00000280 },   /* MUTE=0, VU=1 */
	{ CS47L63_OUTPUT_ENABLE_1,      0x00000002 },   /* EN=1 */
};