Debugging I 2 C Devices; Debugging Spi And Adc; Debugging Gpio; Debugging Pwm - Keysight Technologies U3810A Getting Started Manual

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
Starting kernel ...
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handle
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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
1 i2cdetect -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.
Keysight U3810 Series Getting Started Guide
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
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
1.334985] omap_voltage_late_init: Voltage driver support not added
2 C Devices
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