NXP Semiconductors UM11483 - Bring-up of Bluetooth Interfaces

NXP Semiconductors
UM11483
Getting Started with NXP-based Wireless Modules on i.MX 8M Quad EVK Running Linux OS
6 Bring-up of Bluetooth interfaces
Note: You must first load the combo firmware and initialize the Wi-Fi driver prior to
initializing the Bluetooth interface. Refer to Plugging the wireless module and Section 5.3
"Bring up the Wi-Fi interface" .
Use the following steps to bring up the Bluetooth interfaces.
• Invoke the command to initialize hci0 interface
root@imx8mqevk:~# hciattach /dev/ttymxc2 any 115200 flow
Setting TTY to N_HCI line discipline
Device setup complete
root@imx8mqevk:~# hciconfig hci0 up
root@imx8mqevk:~# hciconfig
hci0: Type: Primary Bus: UART
BD Address: 00:50:43:24:83:B7 ACL MTU: 1021:7 SCO MTU: 120:6
UP RUNNING
RX bytes:1451 acl:0 sco:0 events:84 errors:0
TX bytes:789 acl:0 sco:0 commands:84 errors:0
• Invoke the HCI command to change the speed where <device> is /dev/ttymxc2.
root@imx8mqevk:~# hcitool -i hci0 cmd 0x3f 0x0009 0xc0 0xc6 0x2d 0x00
root@imx8mqevk:~# killall hciattach
root@imx8mqevk:~# hciattach /dev/ttymxc2 any 3000000 flow
root@imx8mqevk:~# hciconfig hci0 up
UM11483 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2021. All rights reserved.
User manual Rev. 2 — 21 January 2021
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