1891980_en-US

How can i use bluetooth in imx8mm evk board?

Hi.

I would like to use bluetooth in imx8mm evk board.

But There is not the uart device file, I think ttymxc0 is connected to bluetooth module.

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root@imx8mmevk:~# hciattach /dev/ttymxc0 any 115200 flow
Can't open serial port: No such file or directory
Can't initialize device: No such file or directory

root@imx8mmevk:~# ls /dev/ttymxc*
/dev/ttymxc1 /dev/ttymxc2

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■ Question

1. What image should i use?

Now, I use imx-image-multimedia-imx8mmevk.wic.

2. What dtb should i use?

Now, I use imx8mm-evk.dtb.

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u-boot=> printenv fdtfile
fdtfile=imx8mm-evk.dtb

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■ additional explaination

1. Image and dtb is installed from https://www.nxp.jp/webapp/Download?colCode=L6.6.3_1.0.0_MX8MM&appType=license

Re: How can i use bluetooth in imx8mm evk board?

I resolved this problem.

I didn't need to execute command [hciattach /dev/ttymxc0 any 115200 flow].

I execute only following command.

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modprobe moal mod_para=nxp/wifi_mod_para.conf

modprobe btnxpuart
hciconfig hci0 up
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I refered https://community.nxp.com/t5/i-MX-Processors-Knowle\dge-Base/Bluetooth-NXP-UART-Driver-Linux-BSP-6-1-22-btnxpuart/ta-p/1708588.

Thanks for a lot!!

Re: How can i use bluetooth in imx8mm evk board?

Why does it use Linux Open Source UART driver?

[6 Bring-up of Bluetooth] section is described as follows.

• Bring up using NXP Bluetooth UART driver on the i.MX Linux BSP version L6.1.22 and later.
• Bring up using Linux Open Source UART driver on i.MX Linux BSP version earlier than L6.1.22.

I downloaded image from following url. I maybe use version 6.6.3.
So I guess that I should refer 6.1 Bring-up using NXP Bluetooth UART driver.

https://www.nxp.jp/webapp/Download?colCode=L6.6.3_1.0.0_MX8MM&appType=license

Re: How can i use bluetooth in imx8mm evk board?

pls refer to the chapter 6.2 Bring-up using Linux open source UART driver of enclosed file

Re: How can i use bluetooth in imx8mm evk board?

Maybe, It's AW-CM358SM (NXP 88W8987).

evk board is not expanding.

Re: How can i use bluetooth in imx8mm evk board?

what BT module do you test on your board?

Re: How can i use bluetooth in imx8mm evk board?

did you use nxp imx8mm lpddr4 evk board?

pls try the command as below

before running BT:
modprobe moal mod_para = wifi_mod_para.conf