RE: Bus fault in i2c and peripheral UART sample code

Edvin — Mon, 16 Dec 2024 09:51:30 GMT

Hello,

Sorry for the late reply.

First, there are a lot (!) of compiler errors in your application. You should fix those. most of them are unused parameters and functions, which are ok, but you have a lot of undeclared functions that are being used.

I also struggle to understand your application flow. It seems to be your i2c write function that is not working.

Particularly, this happens in:

Bsec_Iface_Init() -> bme68x_init() -> bme68x_soft_reset() -> bme68x_set_regs() -> rslt = dev->write() (bme68x_i2c_write())

in your i2c_burst_write_dt() the first parameter should be pointing to your I2C instance from devicetree. From what I can tell, you are using "i2c_dev", coming from inft_ptr->config->i2c, but your inft_ptr is just a pointer being set to BME68X_I2C_ADDR_LOW (=0x76) in bme68x_interface_init(). This needs to point to the I2C instance from devicetree. Try this instead:

if(i2c_burst_write_dt(&dev_i2c, reg_addr, reg_data, len)){

in bme68x_i2c_write().

I couldn't get it working, but I don't have the sensor that you have. I recommend you have a look at the DevAcademy's NCS Fundamentals course, and particularly the exercise on I2C:

https://academy.nordicsemi.com/courses/nrf-connect-sdk-fundamentals/lessons/lesson-6-serial-com-i2c/topic/exercise-1-6-2/

Best regards,

Edvin

RE: Bus fault in i2c and peripheral UART sample code

Mushtakh Shaikh — Fri, 13 Dec 2024 07:42:16 GMT

devzone.nordicsemi.com/.../7103.peripheral_5F00_uart.zip