Keysight Technologies U3810A, Getting Started Manual

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Keysight U3810 Series Getting Started Guide 94
loading /boot/initrd.img-4.14.49-ti-r54 ...
4034122 bytes read in 271 ms (14.2 MiB/s)
debug: [console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1
root=/dev/mmcblk1p1 ro rootfstype=ext4 rootwait coherent_pool=1M
net.ifnames=0 quiet] ...
debug: [bootz 0x82000000 0x88080000:3d8e4a 88000000] ...
## Flattened Device Tree blob at 88000000
Booting using the fdt blob at 0x88000000
Loading Ramdisk to 8fc27000, end 8ffffe4a ... OK
reserving fdt memory region: addr=88000000 size=70000
Loading Device Tree to 8fbb4000, end 8fc26fff ... OK
Starting kernel ...
[ 0.000814] timer_probe: no matching timers found
[ 0.546264] dmi: Firmware registration failed.
[ 1.035757] wkup_m3_ipc 44e11324.wkup_m3_ipc: could not get rproc
handle
[ 1.334985] omap_voltage_late_init: Voltage driver support not added
Debian GNU/Linux 9 beaglebone ttyS0
BeagleBoard.org Debian Image 2018-06-17
U3810A Version 2.50
Support/FAQ: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian
default username:password is [debian:temppwd]
beaglebone login:
Debugging I 2 C Devices
1 i 2cdetect -r -y 1
Debugging SPI and ADC
1
Measure and verify VSENSOR and +5SYS supplies.
Debugging GPIO
1 mraa-gpio list
2
look in
/sys/class/gpio
3 Mention 1 second turnaround for status change.
Debugging PWM
1
/sys/class/pwm. See if there is pwmchip0 and pwmchip2.
2 $ echo ‘0’ > /sys/class/pwm/pwmchip0 should result in seeing the
/sys/class/pwm/pwm-0:0 directory
.
3 In that directory echoing various values will affect PWM output on GP5.