Hardware requirements
Micro USB cable
MIMX8MN6-EVK board
J-Link Debug Probe
12V power supply
Personal Computer
Board settings
No special is needed.
Prepare the Demo
Connect 12V power supply and J-Link Debug Probe to the board, switch SW101 to power on the board
Connect a USB cable between the host PC and the J901 USB port on the target board.
Open two serial terminals for A53 core and M7 core with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Using U-Boot command to run the demo.bin file. For details, please refer to Getting Started with MCUXpresso SDK for i.MX 8M Nano.pdf
After running the demo.bin, using the “boot” command to boot the kernel on the A core terminal;
After the kernel is boot, using “root” to login.
After login, make sure imx_rpmsg_pingpong kernel module is inserted (lsmod) or insert it (modprobe imx_rpmsg_pingpong). Running the demo
=============== After the boot process succeeds, the ARM Cortex-M7 terminal displays the following information:
RPMSG Ping-Pong FreeRTOS RTOS API Demo...
RPMSG Share Base Addr is 0xb8000000
During boot the Kernel,the ARM Cortex-M7 terminal displays the following information:
Link is up!
Nameservice announce sent.
After the Linux RPMsg pingpong module was installed, the ARM Cortex-M7 terminal displays the following information:
Waiting for ping...
Sending pong...
Waiting for ping...
Sending pong...
Waiting for ping...
Sending pong...
......
Waiting for ping...
Sending pong...
Ping pong done, deinitializing...
Looping forever...
The Cortex-A terminal displays the following information:
get 1 (src: 0x1e)
get 3 (src: 0x1e)
......
get 99 (src: 0x1e)
get 101 (src: 0x1e)