About julio_cf98

Hi, I'm using BME688 in a custom board with nRF52840 microcontroller running Zephyr RTOS. I modified the common.c file from bme68x API and checked the I2C transactions with a logic analizer to verify that read/write procedure is in the right format (page 46 in the datasheet). Here are the i2c and delay functions that I edited from the original common.c file available in GitHub. i2c_dev is a structure pointer to the i2c peripheral used by Zephyr.   BME68X_INTF_RET_TYPE bme68x_i2c_read(uint8_t reg_addr, uint8_t *reg_data, uint32_t len, void *intf_ptr) { return i2c_burst_read(i2c_dev, dev_addr, reg_addr, reg_data, len); } BME68X_INTF_RET_TYPE bme68x_i2c_write(uint8_t reg_addr, const uint8_t *reg_data, uint32_t len, void *intf_ptr) { uint8_t tx_buf[len + 1]; tx_buf[0] = reg_addr; memcpy(tx_buf + 1, reg_data, len); return i2c_write(i2c_dev, tx_buf , len + 1, dev_addr); } void bme68x_delay_us(uint32_t period, void *intf_ptr) { k_usleep(period); }     Here is a read timming example to get the chip id. Burst read also works fine.   BME688 chip id I2C read. Here is a burst write example. As in datasheet's page 46,  there is no auto-increment, as you can see the register address increments by 1: 0x71, 0x72, ..., 0x75. BME688 multiple byte write. The problem:  When I run the self-check, this message appears: API name [bme68x_selftest_check] Warning [2] : No new data found And when I try the forced mode example, I always get this output : API name [bme68x_init] OK [0] API name [bme68x_set_conf] OK [0] API name [bme68x_set_heatr_conf]OK [0] Sample, TimeStamp(ms), Temperature(deg C), Pressure(Pa), Humidity(%), Gas resistance(ohm), Status API name [bme68x_set_op_mode] OK [0] API name [bme68x_get_data] Warning [2] : No new data found API name [bme68x_set_op_mode] OK [0] API name [bme68x_get_data] OK [0] 1, 3852, 0, 1107730122, 1200501, 1120403456, 0x80 API name [bme68x_set_op_mode] OK [0] API name [bme68x_get_data] OK [0] 2, 4010, 0, 1107730122, 1200501, 1120403456, 0x80 API name [bme68x_set_op_mode] OK [0] API name [bme68x_get_data] OK [0] 3, 4168, 0, 1107730122, 1200501, 1120403456, 0x80 API name [bme68x_set_op_mode] OK [0] API name [bme68x_get_data] OK [0] 4, 4326, 0, 1107730122, 1200501, 1120403456, 0x80 API name [bme68x_set_op_mode] OK [0] API name [bme68x_get_data] OK [0] 5, 4485, 0, 1107730122, 1200501, 1120403456, 0x80 (...) This is how it looks like at the logic analizer: I'm not using the FPU and I just changed the line time_ms = coines_get_millis(); to: time_ms = k_uptime_get_32();   There are other posts with similar problems but no one seems to resolve it. What can be wrong or missing? ... View more