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since
10-22-2020
01-15-2021
cwi
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01-15-2021
08:55 AM
Okay I've wrote an email but in the meantime I have some further questions. I've got the API code running up to a certain point: https://github.com/BoschSensortec/BMI160_driver#initialization-of-auxiliary-sensor-bmm150 Everything runs fine except when I try to init the bmm150 (remember I have a bmx160). And here is something wrong in the documentation. 1. The current version of the bmm150 code does not have a bmm150.delay_ms = delay_ms; but a bmm150.delay_us function. Why? 2. And there is now an intf_ptr which is used for the read and write function pointers. But these function pointers in your documentation do not use this pointer. 3. And so on.... So there is a big gap between your code and documentation. Kind regards, cwi
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01-14-2021
10:24 AM
Sorry again, but this is not possible with the API code. Because the SPI master runs asynchronously. Is it not possible to get an exact sequence of bytes to send and receive to get the trim parameters? kind regards, CW
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01-13-2021
01:33 PM
Hi, i am trying to read the trim values of the magnetometer. It is not described in the datasheet. As far as I've read from the bmi160 driver firmware it has to be done via the internal bus. But I cannot not use the driver implementation since I am using nordic SPI transaction manager which does not allow the usage of the driver. Therefore, I would like to know the exact line of commands to write and the expected responses from the sensor. Could you please show me where to find these informations. Kind regards, CW
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11-23-2020
12:52 PM
As far as I've understood the trim values need to be read from the BMX160 via the mag_if registers. Following the datasheet: For a read access:
Write magnetometer register address to read from into Register (0x4D) MAG_IF[1]
Read
Register (0x1B) STATUS
until the bit mag_man_op is “0”
Read Register (0x04-0x0B) DATA_0 to DATA_7, get the data from magnetometer
1. First setting the Powermode: 0x19 -> BMX160_COMMAND_REG_ADDR 2. Set setup mode with burst read 8 bytes: 0x83 -> BMX160_MAG_IF_0_ADDR 3. Write Regaddres too MAG_IF1: BMM150_DIG_Z4_LSB -> BMX160_MAG_IF_1_ADDR wait 10 ms 4. Read Status byte and check bit man_mag_op is "0" 5. Read Register (0x04-0x0B) DATA_0 to DATA_7, get the data from magnetometer But I am always getting zeros and not data. Help is apreciated. Best regrads, Constantin
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