[BME280] bme280_init() error

[honoju]

Hello,

I am using a BME280 sensor with STM32L476RG microcontroler.

I am having trouble with the bme280_init() function.

In this function, I pass the first null_ptr_check() so dev , dev->read , dev->write and dev->delay_us  are different from NULL.

But just after that when I enter the bme280_get_regs() function, I don't pass the null_ptr_check() whereas my device structure has not changed.

I investigated the matter with a debugger and I found out dev->intf_ptr has changed from BME280_SPI_INTF to BME280_I2C_INT, which I don't understand as there was no redefinition of the device structure.

Could someone help me?

Thanks

[Yanchao]

Hi,

Maybe lose some configuration. Please check code any different with our example code in BME280_driver.

Best regards.

[honoju]

Thanks for the reply.

Well, I based my code on the driver example from the beginning.

What I find awkward is that the two null_ptr_check(dev) functions are almost consecutive and that I pass the first null_ptr_check(dev)  but not the second without the device structure redifinition.

I attach a picture of the bug location : bme280_init() and just above there is the device structure definition similar to the one in the driver example.

Regards

[Yanchao]

Hi

In bme280_init(), the first null_ptr_check(dev) is ok, but the next null_ptr_check() in bme280_get_regs(BME280_CHIP_ID_ADDR, &chip_id, 1, dev)  is failed, and interface change from SPI to I2C?

It's realy stange, could you please single step print log to confirm the workflow is correct?

[Minhwan]

Hello honoju, 

Could you give me what is error code for rslt? 

You can print out with rslt value. 

And, you can check the error with bme280_defs.h 🙂 

Thanks,