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?

[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 */
};

[SohamGhugare]

That didn't work either for some reason. I tried increasing the volume too but that just increases the white noise thats coming out of the speaker.