About reichemn

Hi BSTRobin, I got it working. A bit dirty but sufficent. I used the "Arduino_BHY2" library from here: https://docs.arduino.cc/ca179f48cffbddcae9863d07cb19054b/nicla-sense-me-libs.zip (Available here: https://docs.arduino.cc/tutorials/nicla-sense-me/cheat-sheet ) I did some changes to the "BoschSensortec.h" file, to make the _bhy2 reference public available.  Also I think there is a bug in the bhy2_soft_passthrough_transfer function in the bhy2.c file. The buffersize passed to the bhy2_hif_exec_soft_passthrough function was to small and I got a BHY2_E_BUFFER error (caused in the bhy2_hif_get_status_fifo function while reading the response back) no matter what I tried. So I increased the buffer size (passed to the bhy2_hif_exec_soft_passthrough function) by 8 to got it working. (So I used  buffer_size+8 in the read case and increased the size of tmp_rd_buf to 20 in the write case). I used the following code for the BSEC library (version 1.4.8.0) so that it can communicate with the BME688 via the BHI260AP:   #include "BoschSensortec.h" bhy2_soft_passthrough_conf conf = { .conf = { .direction = BHY2_SPASS_READ, .trans_type = BHY2_SPASS_MULTI_TRANS, .delay_ctrl = BHY2_SPASS_DELAY_DIS, .master_bus = 0, // sensor driver mode .spi_mode = BHY2_SPASS_SPI_4_WIRE, .cpol = BHY2_SPASS_SPI_CPOL_0, // unsued in sensor driver mode .cpha = BHY2_SPASS_SPI_CPHA_0, // unused in sensor driver mode .delay_val = 4u, // ignored if delay_ctrl disabled .cs_level = BHY2_SPASS_SPI_CS_LOW, // unused in sensor driver mode .lsb_first = BHY2_SPASS_SPI_LSB_FIRST_EN, // unused in sensor driver mode .trans_rate = 1000, // 1000khz // overwritten with gas sensor id later .address_shift = 0, // unused in sensor driver mode, used for sensor id instead .read_bit_pol = 0, // unused in sensor driver mode, used for sensor id instead .read_bit_pos = 0, // unused in sensor driver mode, used for sensor id instead .func_set = { .cs_pin = 4u // CS_680, pad 18, gpio 4 } } }; int8_t bme688_spi_read(uint8_t devId, uint8_t regAddr, uint8_t *regData, uint16_t length) { conf.data[4] = 19u; // physical sensor id of the gas sensor on the BHI260AP conf.conf.direction = BHY2_SPASS_READ; return (int8_t) bhy2_soft_passthrough_transfer(&conf, regAddr , length, regData, &sensortec._bhy2 ); } int8_t bme688_spi_write(uint8_t devId, uint8_t regAddr, uint8_t *regData, uint16_t length) { conf.data[4] = 19u; // physical sensor id of the gas sensor on the BHI260AP conf.conf.direction = BHY2_SPASS_WRITE; return (int8_t)bhy2_soft_passthrough_transfer(&conf, regAddr , length, regData, &sensortec._bhy2 ); } void bme688_delay_us(uint32_t period) { delayMicroseconds(period); } Bsec iaqSensor; void setup(void) { sensortec.begin(); iaqSensor.begin(19, BME680_SPI_INTF, bme688_spi_read, bme688_spi_write, bme688_delay_us); }   ... View more