IoTGateway/BSP/Linux/iMX8/FAQ

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Disable debug console

For ROM-5720 , ROM-5620, ROM-7720

  • Step 1

disable service as below:

systemctl disable serial-getty@ttymxc0.service
  • Step 2

Adjust "1" of SW1 to on. Then reboot.


Running M4 demo application on i.MX8

confirm imx8mq_m4_TCM_hello_world.bin in partition 1

connect mcu debug port

u-boot command as below:

boot from emmc

fatload mmc 0:1 0x7e0000 imx8mq_m4_TCM_hello_world.bin    

boot from sd

fatload mmc 1:1 0x7e0000 imx8mq_m4_TCM_hello_world.bin  

then

bootaux 0x7e0000

console will show "hello world"

iMX8MQ Dual Display

  • Connect HDMI and MIPI to HDMI cable
setenv mmcargs setenv bootargs ${jh_clk} console=${console} modprobe.blacklist=${modprobe.blacklist} root=${mmcroot}
setenv fdt_file adv-imx8mq-rom5720-a1-dual-display.dtb
  • Then weston will show on MIPI to HDMI
  • Playback video on MIPI to HDMI
gst-launch-1.0 filesrc location=HDMI.mp4 ! qtdemux ! h264parse ! vpudec ! waylandsink
  • Playback video on HDMI
gst-launch-1.0 filesrc location=HDMI.mp4 ! qtdemux ! h264parse ! vpudec ! kmssink

ROM-5721 Cold reset setup

If we want to setup cold reset, we have to pull high the MX8MM_IOMUXC_SAI1_RXFS_GPIO4_IO0(default is low).