Using iMX8M Mini UART 3 for M4 as a Bluetooth interface

pradeep2481 — Thu, 09 Jun 2022 09:00:36 GMT

Hi,

I want to use iMX8M Mini, UART 3 for M4 as a Bluetooth interface. M4 will be running with Zephyr OS.

On the EVK board UART3 is available from the header and the pin details for UART 3
TXD - Pin 8

RXD - Pin 10

In Zephyr (boards/arm/mimx8mm_evk/mimx8mm_evk.dts) I have modified the device tree like below.

zephyr,bt-uart = &uart3;

&uart3 {
status = "okay";
current-speed = <115200>;
};

Do I need to do any other changes? What about RDC domain settings?

Does M4 needs to be in RDC domain 1 and UART3 needs to be assigned to domain 1 ? Where this changes are needed? Is it in Zephyr or in the u-boot?

Any help is appreciated.

Thanks in advance,

Best regards,
Pradeep

Re: Using iMX8M Mini UART 3 for M4 as a Bluetooth interface

AldoG — Mon, 13 Jun 2022 22:00:45 GMT

Hello,

Please note that support for zephyr is community based, not direct from NXP. I'll recommend for issue using zephyr in the i.MX MPUs post them at zephyr community.

Best regards,
Aldo.

i.MX ProcessorsのトピックRe: Using iMX8M Mini UART 3 for M4 as a Bluetooth interface

Using iMX8M Mini UART 3 for M4 as a Bluetooth interface

Re: Using iMX8M Mini UART 3 for M4 as a Bluetooth interface