HW: IMX8QXP MEK
Yocto :L5.10.52
Case 1:
When power on my board and stop in uboot command line, I can see below information fromM4 UART:
MCU wakeup source 0x80...
#################### Power Mode Switch Task ####################
Build Time: Feb 20 2021--08:41:40
Core Clock: 264000000Hz
Power mode: RUN
Select the desired operation
Press A to enter: RUN - Normal RUN mode
Press B to enter: WAIT - Wait mode
Press C to enter: STOP - Stop mode
Press D to enter: VLPR - Very Low Power Run mode
Press E to enter: VLPW - Very Low Power Wait mode
Press F to enter: VLPS - Very Low Power Stop mode
Press G to enter: LLS - Low Leakage Stop mode
Press H to enter: VLLS - Very Low Leakage Stop mode
Press R to enter: RESET - using WDOG trigger M4 partition reset.
Waiting for user selection..
Then I try to run imx8qx_m4_TCM_rpmsg_lite_pingpong_rtos_linux_remote.bin by below command:
=>dhcp
=>nfs ${loadaddr} 192.168.50.207:/home/wzg/8TB/IMX/imx8qx_m4_TCM_rpmsg_lite_pingpong_rtos_linux_remote.bin ; dcache flush ; bootaux ${loadaddr} 0
Using ethernet@5b040000 device
File transfer via NFS from server 192.168.50.207; our IP address is 192.168.50.189
Filename '/home/wzg/8TB/IMX/imx8qx_m4_TCM_rpmsg_lite_pingpong_rtos_linux_remote.bin'.
Load address: 0x80280000
Loading: ######
done
Bytes transferred = 29920 (74e0 hex)
## Auxiliary core is already up
=>
Nothing changed in M4 UART
Then run bootcmd to start linux and modprobe imx_rpmsg_tty;modprobe imx_rpmsg_pingpong
I can't find the /dev/ttyRPMSG30
Case 2:
write flash.bin to /dev/mmcblk0boot0 by command:
echo 0 > /sys/block/mmcblk0boot0/force_ro
dd if=/home/root/flash.bin of=/dev/mmcblk0boot0 bs=1024 seek=32 conv=fsync
echo 1 > /sys/block/mmcblk0boot0/force_ro
mmc bootpart enable 1 1 /dev/mmcblk0
When power on my board and stop in uboot command line, I can see nothing from M4 UART:
Then I try to run imx8qx_m4_TCM_rpmsg_lite_pingpong_rtos_linux_remote.bin by below command:
=>dhcp
=> nfs ${loadaddr} 192.168.50.207:/home/wzg/8TB/IMX/imx8qx_m4_TCM_rpmsg_lite_pingpong_rtos_linux_remote.bin ; dcache flush ; bootaux ${loadaddr} 0
Using ethernet@5b040000 device
File transfer via NFS from server 192.168.50.207; our IP address is 192.168.50.137
Filename '/home/wzg/8TB/IMX/imx8qx_m4_TCM_rpmsg_lite_pingpong_rtos_linux_remote.bin'.
Load address: 0x80280000
Loading: ######
done
Bytes transferred = 29920 (74e0 hex)
Power on aux core 0
Copy image from 0x80280000 to 0x34fe0000
Start M4
bootaux complete
=>
I can see below information from M4 USRT:
RPMSG Ping-Pong FreeRTOS RTOS API Demo...
RPMSG Share Base Addr is 0x90010000
Then run bootcmd to start linux and modprobe imx_rpmsg_tty;modprobe imx_rpmsg_pingpong
I still can't find the /dev/ttyRPMSG30
any error in my test step ?