How to use nrf52832 spi to set icm42670p internal clock running during setup progress?

[faithself]

Thanks in advanced. Based on nRF5_SDK_17.0.2, I can use i2c with icm42670p normally. Due to power consideration, I need to r/w this imu with spi either to decide which is the lower power design. But what makes me confused is: I can r/w icm42670p's register with spi normally, but always get wrong MCLK_RDY value(in function: inv_imu_switch_on_mclk, icm42670p eMD). I noticed that AN-000352 is mentioned when use spi interface, but unfortunately I can't find this sheet. Would any experts tell me how to get it? Or point out what key steps I missed directly. I will provide more details if needed. Thanks again.

[Edvin]

Hello,

This AN-000352, is that for the icm42670p? Or is this some Anomaly Notice for the nRF52832 you are talking about?

I don't believe we have any AN-000352 for our nRF52832, and googling "AN-000352" and icm42670p didn't give any results. Perhaps you can ask the producers of the sensor, if they have anything for you.

Best regards,

Edvin

[faithself]

It is for icm42670p, but I can't find AN-000352 in inversense website......

[Edvin]

I see. No, I am not aware of this AN. You should reach out to invensense and ask about it. Alternatively, describe to them what you do and what is not working. I don't have the sensor, or any more knowledge about it than you do (probably even less). 

I see that there are some drivers for this sensor in Zephyr. Are those the ones that you are using?

Best regards,

Edvin

[faithself]

Thanks, maybe you mean this: https://github.com/zephyrproject-rtos/zephyr/tree/main/drivers/sensor/icm42670 ? I can't access this link from China.

[faithself]

Or would you please send them to my email [email protected]? 

[Edvin]

I meant the file found in the nRF Connect SDK (NCS)

NCS\zephyr\drivers\sensor\tdk\icm42670.c 

Do you have the nRF Connect SDK?

Best regards,

Edvin