Keysight Technologies U3810A, Getting Started Manual

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Keysight U3810 Series Getting Started Guide 127
#cmdline=coherent_pool=1M net.ifnames=0 rng_core.default_quality=100
quiet video=HDMI-A-1:1024x768@60e
#Use an overlayfs on top of a read-only root filesystem:
#cmdline=coherent_pool=1M net.ifnames=0 rng_core.default_quality=100
quiet overlayroot=tmpfs
##enable Generic eMMC Flasher:
##make sure, these tools are installed: dosfstools rsync
#cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh
17 A reboot is required to test the overlays. If there is an older version of the operating system, the
USR button as describe in the
Uninitialized BeagleBone devices procedure.
18 On reboot examine the devices in /dev. There should be three I
2
C devices, a pwm device, ttyS0,
ttyS1, ttyS2 and no spi devices.
debian@beaglebone:~$ ls /dev
apm_bios kmem snapshot tty27 tty50 ttyS3
autofs kmsg snd tty28 tty51 ttyS4
bc_example log stderr tty29 tty52 ttyS5
block loop-control stdin tty3 tty53 ubi_ctrl
btrfs-control mapper stdout tty30 tty54 uhid
bus mem tty tty31 tty55 uinput
char memory_bandwidth tty0 tty32 tty56 urandom
console mmcblk1 tty1 tty33 tty57 vcs
cpu_dma_latency mmcblk1boot0 tty10 tty34 tty58 vcs1
cuse mmcblk1boot1 tty11 tty35 tty59 vcs2
disk mmcblk1p1 tty12 tty36 tty6 vcs3
dri mmcblk1rpmb tty13 tty37 tty60 vcs4
fd mqueue tty14 tty38 tty61 vcs5
full net tty15 tty39 tty62 vcs6
fuse network_latency tty16 tty4 tty63 vcsa
gpiochip0 network_throughput tty17 tty40 tty7 vcsa1
gpiochip1 null tty18 tty41 tty8 vcsa2
gpiochip2 ppp tty19 tty42 tty9 vcsa3
gpiochip3 ptmx tty2 tty43 ttyGS0 vcsa4
hwrng pts tty20 tty44 ttyO0 vcsa5
i2c-0 pwm tty21 tty45 ttyO1 vcsa6
i2c-1 random tty22 tty46 ttyO2 vhci
i2c-2 rfkill tty23 tty47 ttyO3 watchdog
iio:device0 rtc tty24 tty48 ttyS0 watchdog0
initctl rtc0 tty25 tty49 ttyS1 watchdog1
input shm tty26 tty5 ttyS2 zero
In /sys/class/pwm, there should be pwmchip0 and pwmchip2.
debian@beaglebone:~$ ls /sys/class/pwm
pwm-0:0 pwm-0:1 pwm-2:0 pwm-2:1 pwmchip0 pwmchip2