ICM20648 and nRF52832

[YHZHANG]

Hi everyone,

I am currently working on a project that requires ICM-20648 and nRF52832. Is there an I2C driver available for these devices? The end goal would be to display accelerometer and gyroscope readings via a terminal emulator program like TeraTerm on my laptop.

I found some libraries for MPUxxxx series but none for ICM-20648. It would be great help if someone could point me to some good resources for such a library.

Thanks so much!

[awneil]

http://www.lmgtfy.com?q=ICM-20648+and+nRF52832

YHZHANG said:

some good resources for such a library.

Start with the SDK examples to get your basic I2C (ie, TWI) comms working.

YHZHANG said:

display accelerometer and gyroscope readings via a terminal emulator program like TeraTerm on my laptop

just via a wired connection, or over BLE? Or some other radio link?

[YHZHANG]

Just via a wired connection (USB) from the nRF52832 (PCA10040) development kit to my laptop. I am also using the InvenSense UEVB (Universal Evaluation Board) with appropriate jumper wires connected to the nRF52832 DK.

[awneil]

So what's the point of using an nRF52 if you're not going to use the BLE?

There are a lot simpler processors for a simple UART-to-TWI if you don't want BLE!

Anyhow, as suggested earlier, start with the SDK examples.

I would suggest that you start with the UART examples to get the comms working with your PC - this will be invaluable for diagnostics later as you get the TWI working ...

YHZHANG said:

(USB) from the nRF52832

Note that the nRF52832 itself does not have USB - there is a USB-to-UART converter (in the J-Link-OB) on the PCA10040.

[YHZHANG]

Hi thanks for your reply! Well, I am really new to embedded systems and my college supervisor assigned me this task to get started on embedded systems haha. I find it quite confusing and difficult to work with the Nordic SDK which is why I thought I should ask for help.

Regarding you suggestion to use the UART examples, would that be relevant? ICM-20648 supports SPI and I2C interface, not sure that UART can work though...

[awneil]

If this is a college assignment, then you really should be going to your supervisor for help!

YHZHANG said:

I find it quite confusing and difficult to work with the Nordic SDK

That is exactly why I suggested that this is not a good choice for such a project!

The Nordic SDK does assume that you are already a competent embedded developer.

YHZHANG said:

Regarding you suggestion to use the UART examples, would that be relevant?

You said you wanted a UART connection to the PC ?

I said you should do that first.

Having first got that working, you would then move on to the I2C part - and, as I said, having the UART comms would be very helpful in doing that.

Here are some general microcontroller getting started tips:

https://www.avrfreaks.net/comment/1138166#comment-1138166

https://www.avrfreaks.net/comment/2079906#comment-2079906

[YHZHANG]

Hi, thanks for your advice! I will have a look at those links!