Bluetooth HCI Setup command (moved from i.MX Processors section)

[tanoue]

I would like to make a Bluetooth driver for IW416 chipset on i.MX8M SoC.

I read a NXP document  (11.1 Connectivity for Bluetooth wireless technology and Wi-Fi) and a knowledge base then I could use Bluetooth function now.

However, I didn't fully understand how to setup Bluetooth HCI.

Please tell me what each command does.

# For PCIe8997/SDIO8997/SDIO8987 and SDIO IW41
hciattach <device> any 115200 flow
hciconfig hci0 up
hcitool -i hci0 cmd 0x3f 0x0009 0xc0 0xc6 0x2d 0x00
killall hciattach
hciattach <device> any -s 3000000 3000000 flow
hciconfig hci0 up 

I wonder why it needs to execute twice "hciattach" and twice "hciconfig hci0 up".

These details are not written in any documentation.

Best Regards,

tanoue.

[cdoumenc · Accepted solution]

Hi tanoue,
The answer to your question can be found in IW416 doc UM11483 on page https://www.nxp.com/products/wireless/wi-fi-plus-bluetooth/iw416-2-4-5-ghz-dual-band-1x1-wi-fi-4-802... chapter 7.

Regards

[tanoue]

Hi, @cdoumenc 

Thank you for your information.

I could not access to your link but I was able to understand these command's functions from UM11483.

[rtwheato]

tanoue, 

The combo firmware needs to be loaded before running the hci commands.  The first hciattach command is not necessary for the iw416, and most solutions only operate at -s 3000000.  The rest of the hciattach command depends on how you have your UART connected.

CEL has a module based on the iw416 called the CMP9010:

https://www.cel.com/product/cmp9010/

And, our evaluation board makes the UART connection simple:

https://www.digikey.com/en/products/detail/cel/CMP9010-1-EVB/15519814

PM me for more information.

best,

-ryan

[tanoue]

Hi, @rtwheato 

Thank you for your reply.

The first hciattach command is not necessary for the iw416, 

I knew it is true.

and most solutions only operate at -s 3000000. The rest of the hciattach command depends on how you have your UART connected.

If IW416 runs with only operate at -s 3000000, why the rest of the hciattach commands be written on NXP's manual?

Is there some other reason?
For example, IW416 works in any situation.

[rtwheato]

I believe the guide you are following is for most all of their wireless/BT products and the initial slower hciattach commands are for the older generation of chips.