root@freescale /$ dd if=/dev/zero of=/mnt/ramdrive/vfat-file bs=1M count=500
root@freescale /$ mke2fs -F /mnt/ramdrive/vfat-file
root@freescale /$ insmod configfs.ko
root@freescale /$ insmod libcomposite.ko
root@freescale /$ insmod usb_f_mass_storage.ko
root@freescale /$ insmod g_mass_storage.ko file=/mnt/ramdrive/vfat-file stall=n
We will get below messages
[ 39.987594] g_mass_storage gadget: Mass Storage Function, version: 2009/09/11
[ 39.994822] g_mass_storage gadget: Number of LUNs=1
[ 39.989240] lun0: LUN: file: /home/backing_file_20mb
[ 39.994367] g_mass_storage gadget: Mass Storage Gadget, version: 2009/09/11
[ 39.990902] g_mass_storage gadget: userspace failed to provide iSerialNumber
[ 39.987547] g_mass_storage gadget: g_mass_storage ready
Attached ***USB3.0 only*** gadget cable to host and you will get below message. Now Storage is ready to use.
g_mass_storage gadget: super-speed config #1: Linux File-Backed Storage
Speaker and Microphone
1. Aplay utility can be used to list the available sound cards e.g. Here Jabra 410 USB speaker is detected as a second sound
card and can be addressed as
–D hw:1,0 OR –c1:
[root@freescale ~]$ aplay –l**** List of PLAYBACK Hardware Devices ****
card 0: FSLVF610TWRBOAR [FSL-VF610-TWR-BOARD], device 0: HiFi sgtl5000-0 [ ]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: USB [Jabra SPEAK 410 USB], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0:
subdevice #0
2. Sample wav file can be played using the below command:
[root@freescale ~]$ aplay -D hw:1,0 LYNC_fsringing.wav
Playing WAVE 'LYNC_fsringing.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
3. Sample wav file can be recorded using the below command:
[root@freescale ~]$ arecord -f S16_LE -t wav -Dhw:1,0 -r 16000 foobar.wav -d 5
Recording WAVE 'foobar.wav' : Signed 16 bit Little Endian, Rate 16000 Hz, Mono
NOTE: If recorded audio is not played, try to use "-D plughw:1,0" in above command.
4. Audio controls can be checked using the below command, control details and name of the controls can be checked from
output of “amixer –c1” as below:
[root@freescale ~]$ amixer –c1 controls
numid=3,iface=MIXER,name='PCM Playback Switch'
numid=4,iface=MIXER,name='PCM Playback Volume'
numid=5,iface=MIXER,name='Headset Capture Switch'
numid=6,iface=MIXER,name='Headset Capture Volume'
numid=2,iface=PCM,name='Capture Channel Map'
numid=1,iface=PCM,name='Playback Channel Map'
[root@freescale ~]$ amixer –c1
Simple mixer control 'PCM',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
Device Drivers
Layerscape LS1028A BSP User Guide, Rev. 0.3, 04/2019
NXP Semiconductors
83
Summary of Contents for Layerscape LS1028A BSP
Page 135: ......
