nrfx_twim_init 0bad0005

[squwal]

Hi all,

I want to use TWIM1 on NRF5340, and I initialize it as follows:

nrfx_twim_t i2c_instance = NRFX_TWIM_INSTANCE(1);
nrfx_twim_config_t i2c_config = NRFX_TWIM_DEFAULT_CONFIG(I2C_SCL_PIN, I2C_SDA_PIN);
......

err = nrfx_twim_init(&i2c_instance, &i2c_config, i2c_handler, NULL);
    if (err != NRFX_SUCCESS) {
            LOG_ERR("nrfx_gpiote_init error: %08x", err);
            return EXIT_FAILURE;
        }

But the return value of err is 0x0bad0005,

I guess may be TWIM1 is occupied by zephyr, because in zephyr.dts:

i2c1: i2c@9000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x9000 0x1000 >;
				clock-frequency = < 0x186a0 >;
				interrupts = < 0x9 0x1 >;
				status = "okay";
				label = "I2C_1";
				compatible = "nordic,nrf-twim";
				sda-pin = < 0x22 >;
				scl-pin = < 0x23 >;
			};

So how to disable i2c1 in zephry? Or maybe there is another reason for this issue?

Please give me some advice, thank you!

[Didrik Rokhaug]

Hi,

You should be able to disable Zephyr's I2C driver by setting the status field in the dts node to "disabled".

Or, you can disable the Zephyr's I2C driver completely by setting CONFIG_I2C=n in your prj.conf file.

For more information on how to use the nrfx drivers in NCS, I recommend you look at Zephyr's nrfx sample in zephyr/samples/board/nrfx.

Best regards,

Didrik