I2C example code for nrf5340

[SRINI]

Hi ,

my environment details:

• nrf connect sdk
• nrf5340 dk
• segger embedded studio

I have seen I2C example code in below path

\v1.5.0\zephyr\samples\drivers\i2c_fujitsu_fram

please let me know where can I update I2C pin numbers (SDA and SCL) and share with me if you have any more example codes on I2C.

Thanks & Regards,

Srinivas Rao.

[Albrecht Markus Schellenberger]

Actually, TWIM doesn’t act as an I2C. TWIM is the master peripheral of an I2C network. Please have a look at the product specification of the nRF5340 on page 627.

The I2C Fujitsu FRAM sample is written for a TWIM.

Regards,

Markus

[SRINI]

Hi ,

I have tested sensor module with nrf52832 using TWIM peripheral . it is working.

I have tested sensor module with nrf5340 using TWIM peripheral . it is not working

 please check below snippet code.

uint8_t address = 0x6A;

uint8_t reg = 0x0f;

uint8_t reg_data = 0;

nrfx_twim_t twim_instance = NRFX_TWIM_INSTANCE(2);

nrfx_twim_config_t twim_config;
twim_config.scl = 10;
twim_config.sda = 9;
twim_config.frequency = NRF_TWIM_FREQ_100K;
twim_config.interrupt_priority = NRFX_TWIM_DEFAULT_CONFIG_IRQ_PRIORITY;
twim_config.hold_bus_uninit = false;

nrfx_twim_init(&twim_instance, &twim_config, &EventHandler, NULL);

 nrfx_twim_enable(&twim_instance);

nrfx_twim_xfer_desc_t const rx_xfer = NRFX_TWIM_XFER_DESC_TXRX(address, &reg, 1, &reg_data, 1);

nrfx_twim_xfer(&twim_instance, &rx_xfer, NRFX_TWIM_FLAG_REPEATED_XFER);

expected output : 0x6C 

Actual output : 0x00

Note: sensor module working tested with nrf52832 without any issues.

please let me know the reason or if you have any tested code with TWIM peripheral . please share to me.

prj.conf file updated with below lines:

CONFIG_I2C=y
CONFIG_I2C_1=y
CONFIG_NRFX_TWIM1=y
CONFIG_NRFX_TWIM2=y
CONFIG_NRFX_TWIM3=y
CONFIG_I2C_NRFX=y

Thanks & Regards,

Srinivas.