I2C read failed reg 0x00 err -5

Question

I am faced "I2C read failed reg 0x00 err -5" issue

&pinctrl {
	i2c22_default: i2c22_default {
		group1 {
			psels = <NRF_PSEL(TWIM_SCL, 2, 7)>,
					<NRF_PSEL(TWIM_SDA, 2, 6)>;
					bias-pull-up;
		};
	};

	i2c22_sleep: i2c22_sleep {
		group1 {
			psels = <NRF_PSEL(TWIM_SCL, 2, 7)>,
					<NRF_PSEL(TWIM_SDA, 2, 6)>;
					low-power-enable;
		};
	};

	i2s20_default: i2s20_default {
		group1 {
			psels = <NRF_PSEL(I2S_SDOUT, 0, 0)>,
			        <NRF_PSEL(I2S_SDIN, 0, 1)>,
			        <NRF_PSEL(I2S_SCK_S, 0, 2)>,
			        <NRF_PSEL(I2S_MCK, 0, 3)>,
			        <NRF_PSEL(I2S_LRCK_M, 0, 4)>;
		};
	};

	i2s20_sleep: i2s20_sleep {
		group1 {
			psels = <NRF_PSEL(I2S_SDOUT, 0, 0)>,
			        <NRF_PSEL(I2S_SDIN, 0, 1)>,
			        <NRF_PSEL(I2S_SCK_S, 0, 2)>,
			        <NRF_PSEL(I2S_MCK, 0, 3)>,
			        <NRF_PSEL(I2S_LRCK_M, 0, 4)>;
		};
	};
};

&i2c22 {
	status = "okay";
	pinctrl-0 = <&i2c22_default>;
	pinctrl-1 = <&i2c22_sleep>;
	pinctrl-names = "default", "sleep";

	audiocodec: audiocodec@18 {
		compatible = "i2c-device";
		status = "okay";
		reg = < 0x18 >;
	};
};

&i2s20 {
	status = "okay";
	pinctrl-0 = <&i2s20_default>;
	pinctrl-1 = <&i2s20_sleep>;
	pinctrl-names = "default", "sleep";
}; this is my overlay

// read command

int read_eg(void)

{

int ret;

uint8_t reg = 0x00;

uint8_t val = 0;

ret = i2c_write_read_dt(&dev_i2c,

&reg, 1,

&val, 1);

if (ret)

{

printk("I2C read failed reg 0x%02x err %d\n", reg, ret);

return ret;

}

printk("Read reg 0x%02x = 0x%02x\n", reg, val);

return 0;

}

int codec_hw_reset(void)

{

int ret;

ret=gpio_pin_set_dt(&codec_reset_pin, 1);

k_msleep(20);

/* HIGH → reset released */

ret=gpio_pin_set_dt(&codec_reset_pin, 0);

k_msleep(50);

// return 0;

// if(ret<3)

// {

// printf("fail hw reset");

// }

return 0;

}

static int codec_i2c_config(void)

{

if (!device_is_ready(dev_i2c.bus))

{

printk("Error: I2C bus %s is not ready!\n", dev_i2c.bus->name);

return -1;

}

printk("I2C bus ready, addr=0x%02x\n", dev_i2c.addr); //dev_i2c.addr

return 0;

}

static int codec_gpios_config(void)

{

int ret;

if (!gpio_is_ready_dt(&codec_reset_pin))

{

printk("Error: Codec reset pin not ready\n");

return -1;

}

ret=gpio_pin_configure_dt(&codec_reset_pin,

GPIO_OUTPUT_ACTIVE |

GPIO_ACTIVE_LOW);

ret=gpio_pin_configure_dt(&codec_reset_pin,

GPIO_OUTPUT_ACTIVE |

GPIO_ACTIVE_LOW);

if (ret < 0)

{

printk("Error %d: Failed to configure codec reset pin\n", ret);

return -1;

}

return 0;

}

int codec_init(void)

{

//

int ret;

ret = codec_gpios_config();

if (ret != 0)

{

return ret;

}

ret = codec_i2c_config();

if (ret != 0)

{

return ret;

}

ret = codec_hw_reset();

if (ret != 0)

{

return ret;

}

k_msleep(50);

read_eg();

return 0;

} this is my code i get -5 error

Syed Maysum Abbas Zaidi · Accepted Answer

Hi, 
 You are using the TWIM22 I2C instance (&i2c22). On nRF54L15, TWIM20/21/22 can only be routed to GPIOs on port P1 (see the Block Diagram ). P2 pins are not supported for TWIM, so using P2.06/P2.07 with &i2c22 will typically result in errors. You may try updating the devicetree so that TWIM20/21/22 use P1.xx pins (GPIO port 1), or alternatively switch to TWIM30 (&i2c30) if you want to use P0.xx pins (GPIO port 0). 
 Kind Regards, Syed Maysum