BME688 sensor API

[Rosso9]

Hi, I'm using  the BME688 sensor for a new project with Nordik nRF52832. I find on github the API for using the sensor. The problem is that API's files include the library coines that I'm not able to find anywhere. I would like to ask you if you have it or if you have a structure of the library to implement (because I do not understand what the various functions do). Thanks for your helps

[SterlingMinsha]

Hello, thank you for sharing and helping me!

[Rosso9]

Hi,

after lots of trouble I'm making progress.

Now, the problem is about the getting new data. Indeed, the output is this:

I2C InterfaceAPI name [bme68x_interface_init]: Tutto ok
API name [bme68x_init]: Tutto ok
API name [bme68x_set_conf]: Tutto ok
API name [bme68x_set_heatr_conf]: Tutto ok
Sample, TimeStamp(ms), Temperature(deg C), Pressure(Pa), Humidity(%), Gas resistance(ohm), Status
API name [bme68x_set_op_mode]: Tutto ok
API name [bme68x_get_data] Warning [2] : No new data found
API name [bme68x_set_op_mode]: Tutto ok
API name [bme68x_get_data] Warning [2] : No new data found

From another issue of Bosch community, I understood that the problem is probably related to the I2C write and read functions I have implemented in the common.c file. 

I have implemented the functions in this way, is it correct?

BME68X_INTF_RET_TYPE bme68x_i2c_read(uint8_t reg_addr, uint8_t *reg_data, uint32_t len, void *intf_ptr)
{
    uint8_t dev_addr = *(uint8_t*)intf_ptr; 
    ret_code_t ret_code;
    ret_code = nrf_drv_twi_tx(&i2c_instance, dev_addr, &reg_addr,1,false);
    if(ret_code != NRF_SUCCESS)
    {
        return ret_code;
    }

    ret_code = nrf_drv_twi_rx(&i2c_instance,dev_addr, reg_data, len);
    if (ret_code == NRF_SUCCESS) 
        return BME68X_OK;
    else 
        return 1;
}



BME68X_INTF_RET_TYPE bme68x_i2c_write(uint8_t reg_addr, const uint8_t *reg_data, uint32_t len, void *intf_ptr)
{
    uint8_t dev_addr = *(uint8_t*)intf_ptr;
    ret_code_t ret_code;
    uint8_t send_tmp[10] = {0};
    send_tmp[0] = reg_addr;
    memcpy(send_tmp+1, reg_data, len);
    ret_code = nrf_drv_twi_tx(&i2c_instance, dev_addr, send_tmp, len , false);  
    if (ret_code == NRF_SUCCESS) 
        return BME68X_OK;
    else 
        return 1;
}

If the logic of the function is not correct, please could you tell me how I have to make it (the logic of the functions I mean)?

Thanks

[Minhwan]

It looks okay. 

Our i2c functions are simple. 

Reg_addr is target register, and reg_data is the data you are going to read and write, and len is data length. 

As long as you implement correctly, it will work. 

Thank you. 

[Rosso9]

Thanks for  looking at my functions. 

The code still has the same problem

API name [bme68x_get_data] Warning [2] : No new data found

What can I do or try to do to solve the problem? I have no more idea. I attach my common.c file to let you see if it is all correct, if you would like to give it a look.

Thanks again