do you know how to connect BMI160 by 3-wire mode?

[kocmocgim]

I don't understand how connect hardware wire and which registr have to read. (i read the datasheet). Thank you.

[hanyazou]

I don't try the 3-wire mode. But the datasheet says that:

3.2Primary Interface Table 25: Mapping of the primary interface pins Pin #1 SDO is DNC (float) in SPI 3-wire mode.

3.2.2Primary SPI Interface Two configurations of the SPI interfaceare supported by the BMI160: 4-wire and 3-wire. The same protocol is used by both configurations. The device operates in 4-wire configuration by default. It can be switched to 3-wire configuration by writing ́1 ́ to Register (0x6B) IF_CONFspi3. Pin SDI is used as the common data pin in 3-wire configuration.

I'm afraid that this library does not support the 3-wire mode. So you must modify the library source code. Why don't you use the 4-wire mode instead?

[kocmocgim]

Why don't you use the 4-wire mode instead?

I develop a motion capture glove based on 18 BMI160 (furher i would neded for 45 BMI160). So wire reducing will be better for me :) But a haven't a lot of time to library modify right now :(

[uzhul38]

Hello, I understand that you are trying to use a lot of BMI160 in a row but, if i understood the SPI protocol correctly, the way to collect datas from one of the 18 BMI160 is with specifying it SS pin. SO between 3-wire and 4-wire mode for 18 BMI160 it will change only one wire. Because the MISO/MOSI and SCK pin will be common for all sensors. So you can use the 4-wire mode of this lib without problems.

[kocmocgim]

I use 4-wire mode. And it works perfect. But I want to reduce wire lenth. It will improve electroscheme. Different in 1 wire is a high for this case, but not a critical.

[Siggi1988]

Hello,

how can I set the sda, scl Pin configuration to use the BMI160 test example on a teensy 3.6?