[MYD-JX8MMA7 development board based on Mil ARM+FPGA architecture] M4 core test (problems not solved)

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[MYD-JX8MMA7 development board based on Mil ARM+FPGA architecture] M4 core test (problems not solved) [Copy link]

Preface

MYD-JX8MMA7 is equipped with a heterogeneous Cortex-M4 coprocessor that can run real-time systems for control and other related processing.

M4 may involve sharing resources with A53 core during operation, so you need to switch to myd jx8mma7-rpmsg-m4.dtb device tree. M4 uses uart4 as serial port.

Prepare

Prepare the following documents

03_Tools\Toolchains\gcc-arm-none-eabi-7-2017-q4-major-linux.tar.bz2

04_Sources\SDK_2.8.0_EVK-MIMX8MM.tar.gz

Unpack the compiler

mkdir toolchain

tar -lxf /mnt/d/BOARD/MYD-JX8MMA7/03_Tools/Toolchains/gcc-arm-none-eabi-7-2017-q4-major-linux.tar.bz2 -C toolchain/

Unzip the SDK package

mkdir SDK_2.8.0_EVK-MIMX8MM

tar -zxf /mnt/d/BOARD/MYD-JX8MMA7/04_Sources/SDK_2.8.0_EVK-MIMX8MM.tar.gz -C SDK_2.8.0_EVK-MIMX8MM/

You can use vscode to open and read, the project is as follows

Set the compiler path

export ARMGCC_DIR=`pwd`/toolchain/gcc-arm-none-eabi-7-2017-q4-major

Compile

cd SDK_2.8.0_EVK-MIMX8MM/boards/evkmimx8mm/demo_apps/hello_world/armgcc/

./clean.sh

./build_debug.sh

Generate hello_world.bin hello_world.elf under debug/

run

Restart and press Enter to enter boot

Modify the device tree to setenv fdtfile myd-jx8mma7-rpmsg.dtb

u-boot=> mmc list

FSL_SDHC: 1

FSL_SDHC: 2 (eMMC)

u-boot=> fatls mmc 2

39297536 Image

6040 imx8mm_m4_TCM_hello_world.bin

17248 imx8mm_m4_TCM_rpmsg_lite_pingpong_rtos_linux_remote.bin

16712 imx8mm_m4_TCM_rpmsg_lite_str_echo_rtos.bin

40780 imx8mm_m4_TCM_sai_low_power_audio.bin

47864 myd-jx8mma7-lvds-atk10-1.dtb

47045 myd-jx8mma7-rpmsg.dtb

474776 tee.bin

8 file(s), 0 dir(s)

u-boot=> print fdtfile

fdtfile=myd-jx8mma7-lvds-atk10-1.dtb

u-boot=> setenv fdtfile myd-jx8mma7-rpmsg.dtb

u-boot=> saveenv

Saving Environment to MMC... Writing to MMC(2)... OK

u-boot=> print fdtfile

fdtfile=myd-jx8mma7-rpmsg.dtb

u-boot=>

Export to Windows: cp debug/hello_world.elf /mnt/d

Development board

cd /lib/firmware/

rz import hello_world.elf to the development board

echo /lib/firmware/hello_world.elf >/sys/class/remoteproc/remoteproc0/firmware

There is no path /sys/class/remoteproc/remoteproc0/firmware, so the test cannot be run.

Summarize

没有/sys/class/remoteproc/remoteproc0/firmware

The reason for this path was not found in the reference documentation.

reference

MYD-JX8MMA7 Software Evaluation Guide.pdf Chapter 2.2

MYD-JX8MMA7 Software Development Guide.pdf Chapter 2.2.2

lugl4313820

没有/sys/class/remoteproc/remoteproc0/firmware

The reason for this path was not found in the reference documentation.

Mir will provide support.