sai_low_power_audio#
Overview#
In this demo, A core decoded music data and put it to DDR buffer and informs M core with the related information. Then M core will take the ownership of consuming the buffer, it will copy buffer from DDR to TCM, manipulating SDMA to transfer the data to SAI and codec for playback. It gives DDR and A core opportunity to do power saving for rather long time frame. M core will also take ownership of codec initialization. SRTM(Simplified Real Time Messaging) protocol is used to communicate between A core and M core. The protocol provides various commands for A core and M core to communicate with each other. If there is no audio palyback, M core will enter the STOP mode, and the whole SOC system would enter deep sleep mode(DSM) once A core enter low power status.
Supported Boards#
EVK9-MIMX8ULP
Hardware requirements
Micro USB cable
MIMX8ULP-EVK/EVK9 board
J-Link Debug Probe
5V power supply
Personal Computer
Headphone
Board settings
No special settings are required.
Note!
This case does not support ddr and flash target.
This case runs together with Linux and the Linux release version should not be lower than 5.15.32-2.0.0.
Prepare the Demo
Connect 5V power supply and J-Link Debug Probe to the board, switch SW10 to power on the board.
Connect a micro USB cable between the host PC and the J17 USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Turn on the power switch on your board to begin running the demo.
NOTE
The 16/24/32bits for PCM Music stream are supported.
Since the music files are typically large, users could create a new large size partition in the SD card to place the music files.
After M core running, please boot the linux kernel to create the rpmsg channel between A core and M core. Make sure the FDT file and key bootargs are correctly set before booting the linux kernel. Following is the example commands on A core U-Boot console: =>setenv fdtfile imx8ulp-9x9-evk-lpa.dtb =>setenv mmcargs ‘setenv bootargs ${jh_clk} console=${console} root=${mmcroot} no_console_suspend snd_pcm.max_alloc_per_card=134217728’ =>saveenv
Please make sure audio file (such as xxx.wav) in any filesystem that Linux can access. One of the way to send audio file to Linux filesystem: Under A core U-Boot console, execute below command to enable 8ULP board’s USB device mode (USB Mass Storage) function: u-boot->ums 0 mmc 0 Connect TYPE-C USB cable between 8ULP board and PC. You will see a drive show on PC to allow copy any file to board. After A core boot to Linux console, the audio file is located at /run/media/boot-mmcblk0p1/
Playback command
Note:
Please use the command “cat /proc/asound/cards” to check the wm8960 sound card number (on A core Linux console). E.g: Type command: ~# cat /proc/asound/cards The available sound cards can be shown:
0 [btscoaudio ]: simple-card - bt-sco-audio bt-sco-audio 1 [imxspdif ]: imx-spdif - imx-spdif imx-spdif 2 [wm8960audio ]: wm8960-audio - wm8960-audio wm8960-audio
Then the wm8960 sound card number is 3.
When playback the .wav file (on A Core Linux console):
If you want to playback with pause/resume command, below command can be used: “aplay -Dhw:2 -i xxx.wav -N”; press space key on the keyboard to pause, and press the space key again to resume.
8ULP supports audio format of S16_LE, and sample rates could be 8kHz, 16kHz and 48kHz, NOT including 44.1kHz.
Current demo should NOT be run with argument ‘plug’, otherwise LPA mode will NOT take effect: “aplay -Dplughw:2 -i xxx.wav -N”
If you want to playback with APD low power mode and specified period-size, below command can be used: “aplay -Dhw:2 –buffer-size=xxx –period-size=xxx xxx.wav -N &” or “aplay -Dhw:2 –buffer-time=xxx –period-time=xxx xxx.wav -N &”. E.g: “aplay -Dhw:2 –period-time=500000 –buffer-time=10000000 xxx.wav -N &” Now please use “echo mem > /sys/power/state” command to make APD enter suspend mode and the playback work normally. Note:
For APD into power down mode, this demo support dual boot mode only.
Please enable the A core has enough time to fill the audio buffer before going into suspend mode.
Running the demo
When the demo runs successfully, the M core log would be seen on the terminal like:
#################### LOW POWER AUDIO TASK ####################
Build Time: Aug 30 2022--12:56:26
Start SRTM communication
********************************
Wait the Linux kernel boot up to create the link between M core and A core.
********************************
BOARD_ReleaseTRDC: 75 start release trdc
BOARD_ReleaseTRDC: 78 finished release trdc, status = 0xd6
BOARD_SetTrdcGlobalConfig: 93 start setup trdc
BOARD_SetTrdcGlobalConfig: 411 finished setup trdc
Handle Peer Core Linkup
The rpmsg channel between M core and A core created!
********************************
Task A is working now.
EVK-MIMX8MM
Hardware requirements
Micro USB cable
MIMX8MM6-EVK board
J-Link Debug Probe
12V power supply
Personal Computer
Headphone
8MIC-PRI-MX8
Board settings
No special settings are required. Connect the 8MIC-PRI-MX8 Microphone board to J1003 on the base board if sound capture needed.
Note!
This case does not support ddr and flash target.
This case runs together with Linux and the Linux release version should be not lower than 5.10.72-2.2.0.
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 a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Launch the debugger in your IDE to begin running the demo.
NOTE
The 16/24/32bit for PCM and DSD64/128/256/512( DSD playabck only supported by ak4497 codec) Music stream are supported
The wm8524 codec on the EVK board and the ak4497 codec on the audio board are both supported, but please note that only one codec can be used at the same time which is determained by the macro “APP_SRTM_CODEC_WM8524_USED” and “APP_SRTM_CODEC_AK4497_USED” in app_srtm.h.
Since the DSD files are typically large, users could create a new large size patition in the SD card to place the music files.
After M core running, please boot the linux kernel to create the rpmsg channel between A core and M core. Make sure the FDT file is correctly set before booting the linux kernel. The following command can be used to set FDT file in uboot console: When ak4497 codec is used, u-boot=>setenv fdtfile imx8mm-evk-rpmsg.dtb u-boot=>saveenv When wm8524 codec is used, u-boot=>setenv fdtfile imx8mm-evk-rpmsg-wm8524.dtb u-boot=>saveenv Set the “snd_pcm.max_alloc_per_card” in bootargs, use the following command to print default mmcargs and add “snd_pcm.max_alloc_per_card=134217728” to the end. u-boot=>printenv mmcargs For example, “mmcargs=setenv bootargs ${jh_clk} ${mcore_clk} console=${console} root=${mmcroot}” is printed, then set the mmcargs using the following command. u-boot=>setenv mmcargs ‘setenv bootargs ${jh_clk} ${mcore_clk} console=${console} root=${mmcroot} snd_pcm.max_alloc_per_card=134217728’ u-boot=>setenv prepare_mcore ‘setenv mcore_clk clk-imx8mm.mcore_booted’ u-boot=>saveenv u-boot=>run prepare_mcore
Please make sure here exists xxx.wav file in the SD card. If the music file is placed at the Windows FAT32 paritions, after the linux kernel boot up and logged as root, using the “mount /dev/mmcblk1p1 /mnt” and then go to “/mnt” folder to playabck the music using the playback command. If the music file is placed at the Linux paritions, eg “/home”, could playback the music dirctly using the playback command.
Playback/record command
Note:
Please use the command “cat /proc/asound/cards” to check the ak4497 sound card number. E.g: Type command: ~# cat /proc/asound/cards The available sound cards can be shown: 0 [imxspdif ]: imx-spdif - imx-spdif mx-spdif 1 [imxaudiomicfil ]: imx-audio-micfi - imx-audio-micfil imx-audio-micfil 2 [btscoaudio ]: bt-sco-audio - bt-sco-audio bt-sco-audio 3 [ak4497audio ]: ak4497-audio - ak4497-audio ak4497-audio Then the ak4497 sound number is 3.
If use the WM8524 codec, use the wm8524 sound card number.
If use the MICFIL for sound capture, use the micfi sound card number.
When playback the .wav file:
If want to playabck with pause/resume command, could use command: “aplay -Dhw:3 -i xxx.wav -N”; press space key on the keyboard to pause, and press the space key again to resume.
If want to playback with low power mode and specified period-size, could use command: “aplay -Dhw:3 –buffer-size=xxx –period-size=xxx xxx.wav -N &” or “aplay -Dhw:3 –buffer-time=xxx –period-time=xxx xxx.wav -N &”. E.g: aplay -Dhw:3 –period-time=500000 –buffer-time=10000000 xxx.wav -N & Now please use “echo mem > /sys/power/state” command to make A core enter suspend mode and the playabck work normally. Note, make sure the A core has enough time to fill the audio buffer before going into suspend mode.
When recording sound(RPMSG MICFIL is only supported when WM8524 codec used), could use command: “arecord -Dhw:1,0 -r44100 -fS16_LE -c2 test.wav &” fS16_LE and 1-8 channels are supported.
When playback the .dsd/.dff file (only supported by AK4497 codec):
Enter folder where the DSD execution procedure exists, using command: “cd /unit_tests/ALSA_DSD”
If want to test play back with specified period-size, could use command: “./mxc_alsa_dsd_player -Dhw:0 –buffer-size=xxx –period-size=xxx music path” or “./mxc_alsa_dsd_player -Dhw:0 –buffer-time=xxx –period-time=xxx music path” Please note that the “music path” means where the DSD file exists.
Support music playabck when A core enters suspend.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
#################### LOW POWER AUDIO TASK ####################
Build Time: Apr 8 2020--15:27:22
********************************
Wait the Linux kernel boot up to create the link between M core and A core.
********************************
M core is running now, please boot the linux kernel and use the command to playback music.
EVK-MIMX8MN
Hardware requirements
Micro USB cable
MIMX8MN6-EVK board
J-Link Debug Probe
12V power supply
Personal Computer
Headphone
Board settings
No special settings are required.
Note!
This case does not support ddr target because of the mass of the music data decoded by A core will be placed in DDR.
This case runs together with Linux and the Linux release version should be not lower than 5.10.72-2.2.0.
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 a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Launch the debugger in your IDE to begin running the demo.
NOTE
The 16/24/32bits for PCM Music stream are supported.
Since the music files are typically large, users could create a new large size patition in the SD card to place the music files.
After M core running, please boot the linux kernel to create the rpmsg channel between A core and M core. Make sure the FDT file is correctly set before booting the linux kernel. The following command can be used to set FDT file in uboot console: u-boot=>setenv fdtfile imx8mn-evk-rpmsg.dtb u-boot=>saveenv Set the “snd_pcm.max_alloc_per_card” in bootargs, use the following command to print default mmcargs and add “snd_pcm.max_alloc_per_card=134217728” to the end. u-boot=>printenv mmcargs For example, “mmcargs=setenv bootargs ${jh_clk} ${mcore_clk} console=${console} root=${mmcroot}” is printed, then set the mmcargs using the following command. u-boot=>setenv mmcargs ‘setenv bootargs ${jh_clk} ${mcore_clk} console=${console} root=${mmcroot} snd_pcm.max_alloc_per_card=134217728’ u-boot=>saveenv
Please make sure there exists xxx.wav file in the SD card. If the music file is placed at the Windows FAT32 paritions, after the linux kernel boots up and logs on as root, using the “mount /dev/mmcblk1p1 /mnt” and then go to “/mnt” folder to playabck the music using the playback command. If the music file is placed at the Linux paritions, eg “/home”, could playback the music directly using the playback command.
Playback command
Note:
Please use the command “cat /proc/asound/cards” to check the wm8524 sound card number. E.g: Type command: ~# cat /proc/asound/cards The available sound cards can be shown: 0 [wm8524audio ]: wm8524-audio - wm8524-audio wm8524-audio 1 [imxspdif ]: imx-spdif - imx-spdif imx-spdif 2 [imxaudiomicfil ]: imx-audio-micfi - imx-audio-micfil imx-audio-micfil
Then the wm8524 sound number is 0.
When playback the .wav file:
If want to playabck with pause/resume command, could use command: “aplay -Dhw:0 -i xxx.wav -N”; press space key on the keyboard to pause, and press the space key again to resume.
If want to playback with low power mode and specified period-size, could use command: “aplay -Dhw:0 –buffer-size=xxx –period-size=xxx xxx.wav -N &” or “aplay -Dhw:0 –buffer-time=xxx –period-time=xxx xxx.wav -N &”. E.g: aplay -Dhw:0 –period-time=500000 –buffer-time=10000000 xxx.wav -N & Now please use “echo mem > /sys/power/state” command to make A core enter suspend mode and the playabck work normally. Note, make sure the A core has enough time to fill the audio buffer before going into suspend mode.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
#################### LOW POWER AUDIO TASK ####################
Build Time: Apr 8 2020--15:27:22
********************************
Wait the Linux kernel boot up to create the link between M core and A core.
********************************
M core is running now, please boot the linux kernel and use the command to playback music.
EVK-MIMX8MNDDR3L
Hardware requirements
Micro USB cable
MIMX8MN6-EVK board
J-Link Debug Probe
12V power supply
Personal Computer
Headphone
Board settings
No special settings are required.
Note!
This case does not support ddr target because of the mass of the music data decoded by A core will be placed in DDR.
This case runs together with Linux and the Linux release version should be not lower than 5.10.72-2.2.0.
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 a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Launch the debugger in your IDE to begin running the demo.
NOTE
The 16/24/32bits for PCM Music stream are supported.
Since the music files are typically large, users could create a new large size patition in the SD card to place the music files.
After M core running, please boot the linux kernel to create the rpmsg channel between A core and M core. Make sure the FDT file is correctly set before booting the linux kernel. The following command can be used to set FDT file in uboot console: u-boot=>setenv fdtfile imx8mn-evk-rpmsg.dtb u-boot=>saveenv Set the “snd_pcm.max_alloc_per_card” in bootargs, use the following command to print default mmcargs and add “snd_pcm.max_alloc_per_card=134217728” to the end. u-boot=>printenv mmcargs For example, “mmcargs=setenv bootargs ${jh_clk} ${mcore_clk} console=${console} root=${mmcroot}” is printed, then set the mmcargs using the following command. u-boot=>setenv mmcargs ‘setenv bootargs ${jh_clk} ${mcore_clk} console=${console} root=${mmcroot} snd_pcm.max_alloc_per_card=134217728’ u-boot=>saveenv
Please make sure there exists xxx.wav file in the SD card. If the music file is placed at the Windows FAT32 paritions, after the linux kernel boots up and logs on as root, using the “mount /dev/mmcblk1p1 /mnt” and then go to “/mnt” folder to playabck the music using the playback command. If the music file is placed at the Linux paritions, eg “/home”, could playback the music directly using the playback command.
Playback command
Note:
Please use the command “cat /proc/asound/cards” to check the wm8524 sound card number. E.g: Type command: ~# cat /proc/asound/cards The available sound cards can be shown: 0 [wm8524audio ]: wm8524-audio - wm8524-audio wm8524-audio 1 [imxspdif ]: imx-spdif - imx-spdif imx-spdif 2 [imxaudiomicfil ]: imx-audio-micfi - imx-audio-micfil imx-audio-micfil
Then the wm8524 sound number is 0.
When playback the .wav file:
If want to playabck with pause/resume command, could use command: “aplay -Dhw:0 -i xxx.wav -N”; press space key on the keyboard to pause, and press the space key again to resume.
If want to playback with low power mode and specified period-size, could use command: “aplay -Dhw:0 –buffer-size=xxx –period-size=xxx xxx.wav -N &” or “aplay -Dhw:0 –buffer-time=xxx –period-time=xxx xxx.wav -N &”. E.g: aplay -Dhw:0 –period-time=500000 –buffer-time=10000000 xxx.wav -N & Now please use “echo mem > /sys/power/state” command to make A core enter suspend mode and the playabck work normally. Note, make sure the A core has enough time to fill the audio buffer before going into suspend mode.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
#################### LOW POWER AUDIO TASK ####################
Build Time: Apr 8 2020--15:27:22
********************************
Wait the Linux kernel boot up to create the link between M core and A core.
********************************
M core is running now, please boot the linux kernel and use the command to playback music.
EVK-MIMX8MP
Hardware requirements
Micro USB cable
EVK-MIMX8M Plus board
J-Link Debug Probe
12V power supply
Personal Computer
Headphone
8MIC-PRI-MX8
Board settings
Connect the 8MIC-PRI-MX8 Microphone board to J21 on the base board if sound capture is needed.
Note!
This case does not support ddr and flash target.
This case runs together with Linux and the Linux release version should be not lower than 5.10.72-2.2.0.
Prepare the Demo
Connect 12V power supply and J-Link Debug Probe to the board, switch SW3 to power on the board
Connect a USB cable between the host PC and the J23 USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Launch the debugger in your IDE to begin running the demo.
NOTE
The 16/24/32bits for PCM Music stream are supported.
Since the music files are typically large, users could create a new large size patition in the SD card to place the music files.
After M core running, please boot the linux kernel to create the rpmsg channel between A core and M core. Make sure the FDT file is correctly set before booting the linux kernel. The following command can be used to set FDT file in uboot console: u-boot=>setenv fdtfile imx8mp-evk-rpmsg.dtb u-boot=>saveenv For RevB4 board, use different dtb u-boot=>setenv fdtfile imx8mp-evk-revb4-rpmsg.dtb u-boot=>saveenv Set the “snd_pcm.max_alloc_per_card” in bootargs, use the following command to print default mmcargs and add “snd_pcm.max_alloc_per_card=134217728” to the end. u-boot=>printenv mmcargs For example, “mmcargs=setenv bootargs ${jh_clk} ${mcore_clk} console=${console} root=${mmcroot}” is printed, then set the mmcargs using the following command. u-boot=>setenv mmcargs ‘setenv bootargs ${jh_clk} ${mcore_clk} console=${console} root=${mmcroot} snd_pcm.max_alloc_per_card=134217728’ u-boot=>saveenv u-boot=>run prepare_mcore
Please make sure there exists xxx.wav file in the SD card. If the music file is placed at the Windows FAT32 paritions, after the linux kernel boots up and logs on as root, using the “mount /dev/mmcblk1p1 /mnt” and then go to “/mnt” folder to playabck the music using the playback command. If the music file is placed at the Linux paritions, eg “/home”, could playback the music directly using the playback command.
Playback/record command
Note:
Please use the command “cat /proc/asound/cards” to check the wm8960 sound card number. E.g: Type command: ~# cat /proc/asound/cards The available sound cards can be shown:
0 [imxaudiomicfil ]: imx-audio-micfi - imx-audio-micfil imx-audio-micfil 1 [imxaudioxcvr ]: imx-audio-xcvr - imx-audio-xcvr imx-audio-xcvr 2 [btscoaudio ]: bt-sco-audio - bt-sco-audio bt-sco-audio 3 [wm8960audio ]: wm8960-audio - wm8960-audio wm8960-audio 4 [audiohdmi ]: audio-hdmi - audio-hdmi audio-hdmi
Then the wm8960 sound card number is 3, the MICFIL sound card number is 0.
When playback the .wav file:
If want to playabck with pause/resume command, could use command: “aplay -Dhw:3 -i xxx.wav -N”; press space key on the keyboard to pause, and press the space key again to resume.
If want to playback with low power mode and specified period-size, could use command: “aplay -Dhw:3 –buffer-size=xxx –period-size=xxx xxx.wav -N &” or “aplay -Dhw:3 –buffer-time=xxx –period-time=xxx xxx.wav -N &”. E.g: “aplay -Dhw:3 –period-time=500000 –buffer-time=10000000 xxx.wav -N &” Now please use “echo mem > /sys/power/state” command to make A core enter suspend mode and the playabck work normally. Note, make sure the A core has enough time to fill the audio buffer before going into suspend mode.
When recording sound, could use command: “arecord -Dhw:0,0 -r44100 -fS32_LE -c2 test.wav &” fS32_LE and 1-8 channels are supported.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
#################### LOW POWER AUDIO TASK ####################
Build Time: Aug 20 2020--08:56:27
********************************
Wait the Linux kernel boot up to create the link between M core and A core.
********************************
M core is running now, please boot the linux kernel and use the command to playback music.
EVK-MIMX8ULP
Hardware requirements
Micro USB cable
MIMX8ULP-EVK/EVK9 board
J-Link Debug Probe
5V power supply
Personal Computer
Headphone
Board settings
No special settings are required.
Note!
This case does not support ddr and flash target.
This case runs together with Linux and the Linux release version should not be lower than 5.15.32-2.0.0.
Prepare the Demo
Connect 5V power supply and J-Link Debug Probe to the board, switch SW10 to power on the board.
Connect a micro USB cable between the host PC and the J17 USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Turn on the power switch on your board to begin running the demo.
NOTE
The 16/24/32bits for PCM Music stream are supported.
Since the music files are typically large, users could create a new large size partition in the SD card to place the music files.
After M core running, please boot the linux kernel to create the rpmsg channel between A core and M core. Make sure the FDT file and key bootargs are correctly set before booting the linux kernel. Following is the example commands on A core U-Boot console: =>setenv fdtfile imx8ulp-evk-lpa.dtb =>setenv mmcargs ‘setenv bootargs ${jh_clk} console=${console} root=${mmcroot} no_console_suspend snd_pcm.max_alloc_per_card=134217728’ =>saveenv
Please make sure audio file (such as xxx.wav) in any filesystem that Linux can access. One of the way to send audio file to Linux filesystem: Under A core U-Boot console, execute below command to enable 8ULP board’s USB device mode (USB Mass Storage) function: u-boot->ums 0 mmc 0 Connect TYPE-C USB cable between 8ULP board and PC. You will see a drive show on PC to allow copy any file to board. After A core boot to Linux console, the audio file is located at /run/media/boot-mmcblk0p1/
Playback command
Note:
Please use the command “cat /proc/asound/cards” to check the wm8960 sound card number (on A core Linux console). E.g: Type command: ~# cat /proc/asound/cards The available sound cards can be shown:
0 [btscoaudio ]: simple-card - bt-sco-audio bt-sco-audio 1 [imxspdif ]: imx-spdif - imx-spdif imx-spdif 2 [wm8960audio ]: wm8960-audio - wm8960-audio wm8960-audio
Then the wm8960 sound card number is 3.
When playback the .wav file (on A Core Linux console):
If you want to playback with pause/resume command, below command can be used: “aplay -Dhw:2 -i xxx.wav -N”; press space key on the keyboard to pause, and press the space key again to resume.
8ULP supports audio format of S16_LE, and sample rates could be 8kHz, 16kHz and 48kHz, NOT including 44.1kHz.
Current demo should NOT be run with argument ‘plug’, otherwise LPA mode will NOT take effect: “aplay -Dplughw:2 -i xxx.wav -N”
If you want to playback with APD low power mode and specified period-size, below command can be used: “aplay -Dhw:2 –buffer-size=xxx –period-size=xxx xxx.wav -N &” or “aplay -Dhw:2 –buffer-time=xxx –period-time=xxx xxx.wav -N &”. E.g: “aplay -Dhw:2 –period-time=500000 –buffer-time=10000000 xxx.wav -N &” Now please use “echo mem > /sys/power/state” command to make APD enter suspend mode and the playback work normally. Note:
For APD into power down mode, this demo support dual boot mode only.
Please enable the A core has enough time to fill the audio buffer before going into suspend mode.
Running the demo
When the demo runs successfully, the M core log would be seen on the terminal like:
#################### LOW POWER AUDIO TASK ####################
Build Time: Aug 30 2022--12:56:26
Start SRTM communication
********************************
Wait the Linux kernel boot up to create the link between M core and A core.
********************************
BOARD_ReleaseTRDC: 75 start release trdc
BOARD_ReleaseTRDC: 78 finished release trdc, status = 0xd6
BOARD_SetTrdcGlobalConfig: 93 start setup trdc
BOARD_SetTrdcGlobalConfig: 411 finished setup trdc
Handle Peer Core Linkup
The rpmsg channel between M core and A core created!
********************************
Task A is working now.