BME688 library linking fails in STM32MP1

[Biswajeet]

Hi, 

I am trying to use the BME688 sensor which is present in our custom hardware based on STM32MP1.After going thrrough all the documentation I have added the following files into my source code "From BME68x-Sensor-API repo, took bme68x.c, bme68x.h, bme68x_defs.h and from bsec_2-0-6-1_generic_release_04302021.zip using two files bsec_datatypes.h, bsec_interface.h. 

Using the bme68x_dev structure, added intf, write, read and delay_us. called bme68x_init() and bsec_init(). 

In my Makefile, when I try to link the static libray available in "BSEC_2.0.6.1_Generic_Release_04302021-> algo->normal_version->bin->gcc->Cortex_A7->libalgobsec.a" in my application, I get thrown with a lot of errors. I have attached the error logs. NOTE: The device is based on Yocto and uses OpenSTlinux(arm-openstlinux_weston-linux-gnueabi-gcc).

Kindly help with the which libray I have to use ? Is there any otherfiles that I need to include in my source ?

[Biswajeet]

Hi BSTRobin, 

I am not able to get the BME688 up and running and facing issues and need your help. 

Here are the list of things I have done so far following the "BST-BME688-Integration-Guide-AN008-06.pdf" document. 

1. Took following files from "BSEC_2.0.6.1_Generic_Release_04302021" repo : bme68x.c, bme68x.h, bme68x_defs.h, bsec_datatypes.h, bsec_interface.h, bsec_serialized_configurations_selectivity.c, bsec_serialized_configurations_selectivity.h
2. As our source code is written in C and in the above repo has "bsec.cpp" file present so I had to convert this file from .cpp to .c. (Attached)
3. Execution sequence : 
   1. "bsec_init()" is successfull and able to read the BSEC version information.
   2. "bsec_set_configuration" returns -34 (BSEC_E_CONFIG_VERSIONMISMATCH) insted of 0(BSEC_OK). 
   3. "bsec_update_subscription" returns 0(BSEC_OK). 
   4. "bme68x_init" returns 0(BSEC_OK).
   5. In a infinite loop, executing "read_sensor_and_process_data" or "Bsec::run"(in bsec.cpp). 
      1. Inside "set_bme68x_parallel_mode" is called and "bme68x_set_heatr_conf" functions returns -2 (BSEC_E_DOSTEPS_VALUELIMITS) after which it exits the function and runs in a loop. 

Can you please let me know where is the issue ? 

I have attached the converted c file and logs for your reference.