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Hi Mich, The API means bsec lib and relative integration code. Have you integrate bsec lib success before? Or the first time integrate bsec lib? Maybe the library in your side has some issue. Please directly contact to the distributor or our colleagues who provide the lib.   Best regards     ... View more

Hi, I'm not sure the API used in your platform. In fact, there are resource to get the BSEC. 1 https://www.bosch-sensortec.com/software-tools/software/bsec/ 2 https://github.com/BoschSensortec/BSEC-Arduino-library 3 https://www.bosch-sensortec.com/software-tools/tools/coines/     You could also refer to coines bsec examples. ... View more

1 CSB Pin voltage keep high, the interface is I2C. CSB voltage switch from low to high, the interface switch to SPI. 2 Check SPI configuration is right. The attachment photo isn't SPI protocol. You could refer to chapter 3.2 SPI Interface for more details. 3 From my suggestion, you could run SPI example on your platform, make sure SPI communication is OK. Then, integrate sensor driver.    I think the platform provide some example to verify SPI communication. Hopefully, you could quickly fix this issue. ... View more

1. Use BMX160 Shuttle Board to communicate through SPI, CS PIN needs set zero or one at the beginning ??? In fact,  if use SPI interface, CS Pin need a raising edge after BMX160 power, from 0 to 1. You need switch CS Pin from 0 to 1 before SPI communication. 2. According to your last reply, I executed rslt = null_ptr_check(dev) in the int8_t bmi160_init (struct bmi160_dev * dev) function, and the result is zero, so it means that my SPI pre-operation should be completed?? It is just whether the MCU uses SPI to connect with BMX160 Success depends on the wave pattern? In function bmi160_init(), dummy read will enable SPI Interface, as bellow /* Dummy read of 0x7F register to enable SPI Interface * if SPI is used */ if ((rslt == BMI160_OK) && (dev->interface == BMI160_SPI_INTF)) { rslt = bmi160_get_regs(BMI160_SPI_COMM_TEST_ADDR, &data, 1, dev); }       ... View more

Hi, rslt == BMI160_OK, just prove the param dev of function int8_t bmi160_init(struct bmi160_dev *dev) isn't NULL pointer. Would you please provide SPI waveform during read BMX160 chip id?   ... View more