Working with EVOK API for the first time



  • Continuing... here is dmesg after the crash

    After

    [    0.000000] Booting Linux on physical CPU 0x0
    [    0.000000] Linux version 4.14.34-v7+ (dc4@dc4-XPS13-9333) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611)) #1110 SMP Mon Apr 16 15:18:51 BST 2018
    [    0.000000] CPU: ARMv7 Processor [410fd034] revision 4 (ARMv7), cr=10c5383d
    [    0.000000] CPU: div instructions available: patching division code
    [    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
    [    0.000000] OF: fdt: Machine model: Raspberry Pi 3 Model B Rev 1.2
    [    0.000000] Memory policy: Data cache writealloc
    [    0.000000] cma: Reserved 8 MiB at 0x3ac00000
    [    0.000000] On node 0 totalpages: 242688
    [    0.000000] free_area_init_node: node 0, pgdat 80c84e40, node_mem_map ba3a1000
    [    0.000000]   Normal zone: 2133 pages used for memmap
    [    0.000000]   Normal zone: 0 pages reserved
    [    0.000000]   Normal zone: 242688 pages, LIFO batch:31
    [    0.000000] random: fast init done
    [    0.000000] percpu: Embedded 17 pages/cpu @ba349000 s38720 r8192 d22720 u69632
    [    0.000000] pcpu-alloc: s38720 r8192 d22720 u69632 alloc=17*4096
    [    0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
    [    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 240555
    [    0.000000] Kernel command line: 8250.nr_uarts=0 bcm2708_fb.fbwidth=656 bcm2708_fb.fbheight=416 bcm2708_fb.fbswap=1 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000  dwc_otg.lpm_enable=0 console=ttyS0,115200 console=tty1 root=PARTUUID=52bc33f2-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
    [    0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
    [    0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
    [    0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
    [    0.000000] Memory: 936296K/970752K available (7168K kernel code, 575K rwdata, 2072K rodata, 1024K init, 706K bss, 26264K reserved, 8192K cma-reserved)
    [    0.000000] Virtual kernel memory layout:
                       vector  : 0xffff0000 - 0xffff1000   (   4 kB)
                       fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
                       vmalloc : 0xbb800000 - 0xff800000   (1088 MB)
                       lowmem  : 0x80000000 - 0xbb400000   ( 948 MB)
                       modules : 0x7f000000 - 0x80000000   (  16 MB)
                         .text : 0x80008000 - 0x80800000   (8160 kB)
                         .init : 0x80b00000 - 0x80c00000   (1024 kB)
                         .data : 0x80c00000 - 0x80c8fd4c   ( 576 kB)
                          .bss : 0x80c96f4c - 0x80d478b4   ( 707 kB)
    [    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
    [    0.000000] ftrace: allocating 25231 entries in 74 pages
    [    0.000000] Hierarchical RCU implementation.
    [    0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
    [    0.000000] arch_timer: cp15 timer(s) running at 19.20MHz (phys).
    [    0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x46d987e47, max_idle_ns: 440795202767 ns
    [    0.000007] sched_clock: 56 bits at 19MHz, resolution 52ns, wraps every 4398046511078ns
    [    0.000023] Switching to timer-based delay loop, resolution 52ns
    [    0.000274] Console: colour dummy device 80x30
    [    0.000819] console [tty1] enabled
    [    0.000856] Calibrating delay loop (skipped), value calculated using timer frequency.. 38.40 BogoMIPS (lpj=192000)
    [    0.000895] pid_max: default: 32768 minimum: 301
    [    0.001221] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)
    [    0.001255] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes)
    [    0.002212] Disabling memory control group subsystem
    [    0.002310] CPU: Testing write buffer coherency: ok
    [    0.002725] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
    [    0.003116] Setting up static identity map for 0x100000 - 0x10003c
    [    0.003251] Hierarchical SRCU implementation.
    [    0.003901] smp: Bringing up secondary CPUs ...
    [    0.004609] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
    [    0.005366] CPU2: thread -1, cpu 2, socket 0, mpidr 80000002
    [    0.006104] CPU3: thread -1, cpu 3, socket 0, mpidr 80000003
    [    0.006208] smp: Brought up 1 node, 4 CPUs
    [    0.006279] SMP: Total of 4 processors activated (153.60 BogoMIPS).
    [    0.006300] CPU: All CPU(s) started in HYP mode.
    [    0.006318] CPU: Virtualization extensions available.
    [    0.007188] devtmpfs: initialized
    [    0.018104] VFP support v0.3: implementor 41 architecture 3 part 40 variant 3 rev 4
    [    0.018356] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
    [    0.018401] futex hash table entries: 1024 (order: 4, 65536 bytes)
    [    0.018977] pinctrl core: initialized pinctrl subsystem
    [    0.019732] NET: Registered protocol family 16
    [    0.022352] DMA: preallocated 1024 KiB pool for atomic coherent allocations
    [    0.027049] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.
    [    0.027082] hw-breakpoint: maximum watchpoint size is 8 bytes.
    [    0.027302] Serial: AMBA PL011 UART driver
    [    0.028936] bcm2835-mbox 3f00b880.mailbox: mailbox enabled
    [    0.029410] uart-pl011 3f201000.serial: could not find pctldev for node /soc/gpio@7e200000/uart0_pins, deferring probe
    [    0.060894] bcm2835-dma 3f007000.dma: DMA legacy API manager at bb813000, dmachans=0x1
    [    0.062328] SCSI subsystem initialized
    [    0.062564] usbcore: registered new interface driver usbfs
    [    0.062632] usbcore: registered new interface driver hub
    [    0.062731] usbcore: registered new device driver usb
    [    0.070069] raspberrypi-firmware soc:firmware: Attached to firmware from 2018-04-16 18:16
    [    0.071387] clocksource: Switched to clocksource arch_sys_counter
    [    0.148794] VFS: Disk quotas dquot_6.6.0
    [    0.148906] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
    [    0.149109] FS-Cache: Loaded
    [    0.149320] CacheFiles: Loaded
    [    0.158119] NET: Registered protocol family 2
    [    0.158860] TCP established hash table entries: 8192 (order: 3, 32768 bytes)
    [    0.158990] TCP bind hash table entries: 8192 (order: 4, 65536 bytes)
    [    0.159193] TCP: Hash tables configured (established 8192 bind 8192)
    [    0.159338] UDP hash table entries: 512 (order: 2, 16384 bytes)
    [    0.159399] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
    [    0.159644] NET: Registered protocol family 1
    [    0.160103] RPC: Registered named UNIX socket transport module.
    [    0.160128] RPC: Registered udp transport module.
    [    0.160147] RPC: Registered tcp transport module.
    [    0.160166] RPC: Registered tcp NFSv4.1 backchannel transport module.
    [    0.160380] Trying to unpack rootfs image as initramfs...
    [    0.497099] Freeing initrd memory: 3936K
    [    0.502792] hw perfevents: enabled with armv7_cortex_a7 PMU driver, 7 counters available
    [    0.505597] workingset: timestamp_bits=14 max_order=18 bucket_order=4
    [    0.513598] FS-Cache: Netfs 'nfs' registered for caching
    [    0.514206] NFS: Registering the id_resolver key type
    [    0.514253] Key type id_resolver registered
    [    0.514272] Key type id_legacy registered
    [    0.514301] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
    [    0.516149] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)
    [    0.516295] io scheduler noop registered
    [    0.516317] io scheduler deadline registered (default)
    [    0.516605] io scheduler cfq registered
    [    0.516627] io scheduler mq-deadline registered
    [    0.516647] io scheduler kyber registered
    [    0.519489] BCM2708FB: allocated DMA memory fad10000
    [    0.519535] BCM2708FB: allocated DMA channel 0 @ bb813000
    [    0.528062] Console: switching to colour frame buffer device 82x26
    [    0.536532] bcm2835-rng 3f104000.rng: hwrng registered
    [    0.538989] vc-mem: phys_addr:0x00000000 mem_base=0x3ec00000 mem_size:0x40000000(1024 MiB)
    [    0.544128] vc-sm: Videocore shared memory driver
    [    0.546711] gpiomem-bcm2835 3f200000.gpiomem: Initialised: Registers at 0x3f200000
    [    0.560861] brd: module loaded
    [    0.571794] loop: module loaded
    [    0.574080] Loading iSCSI transport class v2.0-870.
    [    0.577024] libphy: Fixed MDIO Bus: probed
    [    0.579388] usbcore: registered new interface driver lan78xx
    [    0.581742] usbcore: registered new interface driver smsc95xx
    [    0.583906] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
    [    0.814153] Core Release: 2.80a
    [    0.816322] Setting default values for core params
    [    0.818560] Finished setting default values for core params
    [    1.021097] Using Buffer DMA mode
    [    1.023408] Periodic Transfer Interrupt Enhancement - disabled
    [    1.025784] Multiprocessor Interrupt Enhancement - disabled
    [    1.028214] OTG VER PARAM: 0, OTG VER FLAG: 0
    [    1.030599] Dedicated Tx FIFOs mode
    [    1.033254] WARN::dwc_otg_hcd_init:1046: FIQ DMA bounce buffers: virt = 0xbad04000 dma = 0xfad04000 len=9024
    [    1.037963] FIQ FSM acceleration enabled for :
                   Non-periodic Split Transactions
                   Periodic Split Transactions
                   High-Speed Isochronous Endpoints
                   Interrupt/Control Split Transaction hack enabled
    [    1.049032] dwc_otg: Microframe scheduler enabled
    [    1.049087] WARN::hcd_init_fiq:459: FIQ on core 1 at 0x805e6a40
    [    1.051375] WARN::hcd_init_fiq:460: FIQ ASM at 0x805e6da8 length 36
    [    1.053644] WARN::hcd_init_fiq:486: MPHI regs_base at 0xbb87e000
    [    1.055922] dwc_otg 3f980000.usb: DWC OTG Controller
    [    1.058246] dwc_otg 3f980000.usb: new USB bus registered, assigned bus number 1
    [    1.060627] dwc_otg 3f980000.usb: irq 62, io mem 0x00000000
    [    1.062974] Init: Port Power? op_state=1
    [    1.065235] Init: Power Port (0)
    [    1.067625] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
    [    1.069937] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    [    1.072267] usb usb1: Product: DWC OTG Controller
    [    1.074517] usb usb1: Manufacturer: Linux 4.14.34-v7+ dwc_otg_hcd
    [    1.076792] usb usb1: SerialNumber: 3f980000.usb
    [    1.079624] hub 1-0:1.0: USB hub found
    [    1.081855] hub 1-0:1.0: 1 port detected
    [    1.084440] dwc_otg: FIQ enabled
    [    1.084445] dwc_otg: NAK holdoff enabled
    [    1.084450] dwc_otg: FIQ split-transaction FSM enabled
    [    1.084459] Module dwc_common_port init
    [    1.084688] usbcore: registered new interface driver usb-storage
    [    1.086974] mousedev: PS/2 mouse device common for all mice
    [    1.089193] IR NEC protocol handler initialized
    [    1.091360] IR RC5(x/sz) protocol handler initialized
    [    1.093584] IR RC6 protocol handler initialized
    [    1.095761] IR JVC protocol handler initialized
    [    1.097839] IR Sony protocol handler initialized
    [    1.099923] IR SANYO protocol handler initialized
    [    1.102025] IR Sharp protocol handler initialized
    [    1.104021] IR MCE Keyboard/mouse protocol handler initialized
    [    1.106048] IR XMP protocol handler initialized
    [    1.108720] bcm2835-wdt 3f100000.watchdog: Broadcom BCM2835 watchdog timer
    [    1.111062] bcm2835-cpufreq: min=600000 max=1200000
    [    1.113596] sdhci: Secure Digital Host Controller Interface driver
    [    1.115726] sdhci: Copyright(c) Pierre Ossman
    [    1.118167] mmc-bcm2835 3f300000.mmc: could not get clk, deferring probe
    [    1.120637] sdhost-bcm2835 3f202000.mmc: could not get clk, deferring probe
    [    1.122956] sdhci-pltfm: SDHCI platform and OF driver helper
    [    1.126569] ledtrig-cpu: registered to indicate activity on CPUs
    [    1.128994] hidraw: raw HID events driver (C) Jiri Kosina
    [    1.131471] usbcore: registered new interface driver usbhid
    [    1.133778] usbhid: USB HID core driver
    [    1.136614] vchiq: vchiq_init_state: slot_zero = bad80000, is_master = 0
    [    1.140321] [vc_sm_connected_init]: start
    [    1.149779] [vc_sm_connected_init]: end - returning 0
    [    1.152653] Initializing XFRM netlink socket
    [    1.155034] NET: Registered protocol family 17
    [    1.157500] Key type dns_resolver registered
    [    1.160266] Registering SWP/SWPB emulation handler
    [    1.163371] registered taskstats version 1
    [    1.171647] uart-pl011 3f201000.serial: cts_event_workaround enabled
    [    1.174215] 3f201000.serial: ttyAMA0 at MMIO 0x3f201000 (irq = 87, base_baud = 0) is a PL011 rev2
    [    1.180970] mmc-bcm2835 3f300000.mmc: mmc_debug:0 mmc_debug2:0
    [    1.183544] mmc-bcm2835 3f300000.mmc: DMA channel allocated
    [    1.242038] sdhost: log_buf @ bad07000 (fad07000)
    [    1.280710] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
    [    1.284701] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
    [    1.288551] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
    [    1.293557] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
    [    1.301490] Indeed it is in host mode hprt0 = 00021501
    [    1.321405] mmc0: sdhost-bcm2835 loaded - DMA enabled (>1)
    [    1.362374] of_cfs_init
    [    1.364470] of_cfs_init: OK
    [    1.369708] Freeing unused kernel memory: 1024K
    [    1.388856] mmc0: host does not support reading read-only switch, assuming write-enable
    [    1.396486] mmc0: new high speed SDHC card at address b368
    [    1.399727] mmcblk0: mmc0:b368 SDU16 14.9 GiB
    [    1.403634]  mmcblk0: p1 p2
    [    1.428753] mmc1: new high speed SDIO card at address 0001
    [    1.521484] usb 1-1: new high-speed USB device number 2 using dwc_otg
    [    1.523775] Indeed it is in host mode hprt0 = 00001101
    [    1.761762] usb 1-1: New USB device found, idVendor=0424, idProduct=9514
    [    1.764079] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
    [    1.767102] hub 1-1:1.0: USB hub found
    [    1.769571] hub 1-1:1.0: 5 ports detected
    [    1.816259] rtc-ds1307 1-006f: registered as rtc0
    [    1.853824] at24 1-0057: 128 byte 24c01 EEPROM, writable, 1 bytes/write
    [    1.899674] i2c /dev entries driver
    [    2.091430] usb 1-1.1: new high-speed USB device number 3 using dwc_otg
    [    2.197832] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
    [    2.221821] usb 1-1.1: New USB device found, idVendor=0424, idProduct=ec00
    [    2.227133] usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
    [    2.234589] smsc95xx v1.0.6
    [    2.325136] smsc95xx 1-1.1:1.0 eth0: register 'smsc95xx' at usb-3f980000.usb-1.1, smsc95xx USB 2.0 Ethernet, b8:27:eb:bf:f5:2a
    [    2.891203] NET: Registered protocol family 10
    [    2.895334] Segment Routing with IPv6
    [    2.906940] ip_tables: (C) 2000-2006 Netfilter Core Team
    [    2.939852] systemd[1]: systemd 232 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN)
    [    2.948768] systemd[1]: Detected architecture arm.
    [    2.953296] systemd[1]: Set hostname to <unipi>.
    [    2.960410] systemd[1]: Hardware watchdog 'Broadcom BCM2835 Watchdog timer', version 0
    [    2.960446] systemd[1]: Set hardware watchdog to 10s.
    [    3.342703] systemd[1]: [/etc/systemd/system/evok.service:9] Unknown lvalue 'StartLimitIntervalSec' in section 'Service'
    [    3.388229] systemd[1]: Listening on fsck to fsckd communication Socket.
    [    3.391927] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.
    [    3.412053] systemd[1]: Listening on Syslog Socket.
    [    3.415855] systemd[1]: Created slice User and Session Slice.
    [    3.777925] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
    [    3.885148] systemd-journald[207]: Received request to flush runtime journal from PID 1
    [    4.452917] snd_bcm2835: module is from the staging directory, the quality is unknown, you have been warned.
    [    4.460742] bcm2835_alsa bcm2835_alsa: card created with 8 channels
    [    4.595879] brcmfmac: F1 signature read @0x18000000=0x1541a9a6
    [    4.609315] brcmfmac: brcmf_fw_map_chip_to_name: using brcm/brcmfmac43430-sdio.bin for chip 0x00a9a6(43430) rev 0x000001
    [    4.609563] usbcore: registered new interface driver brcmfmac
    [    4.829735] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Oct 23 2017 03:55:53 version 7.45.98.38 (r674442 CY) FWID 01-e58d219f
    [    4.830625] brcmfmac: brcmf_c_preinit_dcmds: CLM version = API: 12.2 Data: 7.11.15 Compiler: 1.24.2 ClmImport: 1.24.1 Creation: 2014-05-26 10:53:55 Inc Data: 9.10.39 Inc Compiler: 1.29.4 Inc ClmImport: 1.36.3 Creation: 2017-10-23 03:47:14
    [    4.889624] unipi: loading out-of-tree module taints kernel.
    [    4.889628] unipi: loading out-of-tree module taints kernel.
    [    4.892249] NEURONSPI: Neuronspi Probe Started
    [    4.895507] NEURONSPI: Probe did not detect a valid Neuron device on CS 3
    [    4.895959] NEURONSPI: Neuronspi Probe Started
    [    4.899222] NEURONSPI: Probe detected Neuron Board E_4Ai4Ao_U_6Di5Ro (L:f U:5 C:f) Index: 1 Fw: v5.18 on CS 2, Uart count: 1 - reg1000: 512, reg1001: 605, reg1002: 41, reg1003: f10, reg1004: b10
    [    4.899237] NEURONSPI: Neuron device E_4Ai4Ao_U_6Di5Ro on CS 2 uses SPI communication freq. 7500000 Hz
    [    4.910066] NEURONSPI: Added UART port 0
    [    4.916302] NEURONSPI: Neuronspi Probe Started
    [    4.918290] NEURONSPI: Probe detected Neuron Board B_1000 (L:0 U:0 C:0) Index: 0 Fw: v5.18 on CS 1, Uart count: 1 - reg1000: 512, reg1001: 404, reg1002: 311, reg1003: 10, reg1004: 10
    [    4.918302] NEURONSPI: Neuron device B_1000 on CS 1 uses SPI communication freq. 12000000 Hz
    [    4.918426] NEURONSPI: LED model B_1000 with 4 LEDs detected at CS: 1
    [    4.918442] NEURONSPI: Detected Neuron board combination corresponding to Neuron M503
    [    4.924209] NEURONSPI: Added UART port 1
    [    4.926066] NEURONSPI: SPI Driver Registered, Major Version: Development Beta Version 0.11:06:06:2018
    [    4.927369] NEURONSPI TTYInit
    [    5.765470] uart-pl011 3f201000.serial: no DMA platform data
    [    6.309841] EXT4-fs (mmcblk0p2): resizing filesystem from 442368 to 3897088 blocks
    [    6.365946] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
    [    6.365958] brcmfmac: power management disabled
    [    7.211363] random: crng init done
    [    7.972551] smsc95xx 1-1.1:1.0 eth0: hardware isn't capable of remote wakeup
    [    9.631534] smsc95xx 1-1.1:1.0 eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1
    [   12.838396] Bluetooth: Core ver 2.22
    [   12.838475] NET: Registered protocol family 31
    [   12.838484] Bluetooth: HCI device and connection manager initialized
    [   12.838506] Bluetooth: HCI socket layer initialized
    [   12.838518] Bluetooth: L2CAP socket layer initialized
    [   12.838553] Bluetooth: SCO socket layer initialized
    [   13.688340] Bluetooth: HCI UART driver ver 2.3
    [   13.688355] Bluetooth: HCI UART protocol H4 registered
    [   13.688361] Bluetooth: HCI UART protocol Three-wire (H5) registered
    [   13.688589] Bluetooth: HCI UART protocol Broadcom registered
    [   18.863561] systemd[1]: apt-daily.timer: Adding 6h 56min 19.812726s random time.
    [   18.865315] systemd[1]: apt-daily-upgrade.timer: Adding 57min 19.609548s random time.
    [   19.114003] EXT4-fs (mmcblk0p2): resized to 1572864 blocks
    [   19.802250] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
    [   19.802261] Bluetooth: BNEP filters: protocol multicast
    [   19.802284] Bluetooth: BNEP socket layer initialized
    [   19.863425] Adding 102396k swap on /var/swap.  Priority:-2 extents:1 across:102396k SSFS
    [   43.322776] EXT4-fs (mmcblk0p2): resized to 3145728 blocks
    [   51.652015] EXT4-fs (mmcblk0p2): resized filesystem to 3897088
    [   60.959601] systemd[1]: apt-daily.timer: Adding 6h 35min 27.035347s random time.
    [   60.961564] systemd[1]: apt-daily-upgrade.timer: Adding 40min 52.921030s random time.
    [   62.394188] nf_conntrack version 0.5.0 (15360 buckets, 61440 max)
    [  249.928194] Unable to handle kernel NULL pointer dereference at virtual address 00000000
    [  249.932292] pgd = b93d0000
    [  249.934319] [00000000] *pgd=38b75835, *pte=00000000, *ppte=00000000
    [  249.936514] Internal error: Oops: 80000007 [#1] SMP ARM
    [  249.938698] Modules linked in: iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack cmac bnep hci_uart btbcm serdev bluetooth ecdh_generic unipi(O) industrialio spidev brcmfmac brcmutil cfg80211 rfkill snd_bcm2835(C) snd_pcm snd_timer snd spi_bcm2835 uio_pdrv_genirq uio fixed ip_tables x_tables ipv6 i2c_dev rtc_ds1307 at24 hwmon i2c_bcm2835
    [  249.950981] CPU: 1 PID: 1091 Comm: cat Tainted: G         C O    4.14.34-v7+ #1110
    [  249.956125] Hardware name: BCM2835
    [  249.958723] task: b8cfbc00 task.stack: b6dbe000
    [  249.961396] PC is at 0x0
    [  249.964074] LR is at iio_read_channel_info+0xa8/0xb0 [industrialio]
    [  249.966810] pc : [<00000000>]    lr : [<7f416858>]    psr: 60000013
    [  249.969569] sp : b6dbfdc8  ip : 00000000  fp : b6dbfe04
    [  249.972339] r10: b6dbfe68  r9 : b90c7e00  r8 : b928d818
    [  249.975080] r7 : b9dab000  r6 : 8083bd4c  r5 : b9dab000  r4 : b6dbfdd8
    [  249.977879] r3 : b6dbfddc  r2 : b6dbfdd8  r1 : 7f48b934  r0 : b928d800
    [  249.980601] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
    [  249.983321] Control: 10c5383d  Table: 393d006a  DAC: 00000055
    [  249.986084] Process cat (pid: 1091, stack limit = 0xb6dbe210)
    [  249.988834] Stack: (0xb6dbfdc8 to 0xb6dc0000)
    [  249.991537] fdc0:                   00000000 00000001 00000001 00000002 014000c0 80276984
    [  249.996852] fde0: b6dbfe34 b6dbfdf0 80276984 b90c7500 b8bd24c0 8083bd4c b6dbfe1c b6dbfe08
    [  250.002114] fe00: 8053d6f8 7f4167bc b90c7500 00001000 b6dbfe44 b6dbfe20 80309218 8053d6d8
    [  250.007386] fe20: b90c7500 00000001 00000000 00000001 b881b540 b6dbff80 b6dbfe54 b6dbfe48
    [  250.012809] fe40: 80307a6c 8030918c b6dbfea4 b6dbfe58 802b15ec 80307a44 00000000 b90c7530
    [  250.018567] fe60: 76c92000 00020000 00000000 00000000 bab5bd68 00000000 b6dbfea4 00020000
    [  250.024554] fe80: b6dbff80 76c92000 b6dbff80 00020000 b90c7e00 00000000 b6dbfedc b6dbfea8
    [  250.030768] fea0: 80308884 802b1414 00000000 00100073 00000000 b881b540 b6dbff80 76c92000
    [  250.037291] fec0: b6dbff80 00020000 b6dbe000 00000000 b6dbff4c b6dbfee0 8028a624 8030875c
    [  250.043951] fee0: 76c91000 b6dbffb0 00001000 000001ff b6dbffac b6dbff00 801011e4 807a0468
    [  250.050798] ff00: b6dbff48 00000003 00022000 00000000 00000000 80242100 b6dbff74 8028a790
    [  250.057783] ff20: 80242100 8016cd34 00020000 b881b540 76c92000 b6dbff80 80108204 b6dbe000
    [  250.064012] ff40: b6dbff7c b6dbff50 8028a7b8 8028a5f8 00000022 802aadf8 b6dbff7c b881b540
    [  250.067522] ff60: b881b540 00020000 76c92000 80108204 b6dbffa4 b6dbff80 8028ad68 8028a728
    [  250.071040] ff80: 00000000 00000000 00020000 7fffe000 00020000 00000003 00000000 b6dbffa8
    [  250.074557] ffa0: 80108060 8028ad20 00020000 7fffe000 00000003 76c92000 00020000 00027184
    [  250.078074] ffc0: 00020000 7fffe000 00020000 00000003 00000003 00020000 ffffffff 00000000
    [  250.081582] ffe0: 00000000 7ec10594 000141cc 76f0f0cc 60000010 00000003 00000000 00000000
    [  250.085138] [<7f416858>] (iio_read_channel_info [industrialio]) from [<8053d6f8>] (dev_attr_show+0x2c/0x58)
    [  250.088690] [<8053d6f8>] (dev_attr_show) from [<80309218>] (sysfs_kf_seq_show+0x98/0x108)
    [  250.092226] [<80309218>] (sysfs_kf_seq_show) from [<80307a6c>] (kernfs_seq_show+0x34/0x38)
    [  250.095765] [<80307a6c>] (kernfs_seq_show) from [<802b15ec>] (seq_read+0x1e4/0x504)
    [  250.099294] [<802b15ec>] (seq_read) from [<80308884>] (kernfs_fop_read+0x134/0x1a4)
    [  250.102845] [<80308884>] (kernfs_fop_read) from [<8028a624>] (__vfs_read+0x38/0x130)
    [  250.106407] [<8028a624>] (__vfs_read) from [<8028a7b8>] (vfs_read+0x9c/0x168)
    [  250.108236] [<8028a7b8>] (vfs_read) from [<8028ad68>] (SyS_read+0x54/0xb0)
    [  250.110040] [<8028ad68>] (SyS_read) from [<80108060>] (ret_fast_syscall+0x0/0x28)
    [  250.113482] Code: bad PC value
    [  250.115194] ---[ end trace e9215518fd25ea5f ]---
    


  • And here is my fwspi report:

    pi@M503-sn22:/opt/neuron-bin $ sudo ./fwspi -i 1
    Boardset:    15 E-4Ai4Ao_U-6Di5Ro              (v1.0)
    Baseboard:   11 E-4Ai4Ao                       (v1.0)
    Firmware: v5.18
    

  • administrators

    Hi @thiagoralves!

    The software version you have (both for firmware and kernel) is relatively old. I cannot guarantee it will fix the issue, but you should be able to update it easily by running:

    sudo su
    mount -o rw,remount /
    echo "deb https://repo.unipi.technology/debian stretch main" >> /etc/apt/sources.list.d/unipi.list
    wget https://repo.unipi.technology/debian/unipi_pub.gpg -O - | apt-key add
    apt-get update
    sync
    reboot
    ----reboot occurs here----
    sudo su
    mount -o rw,remount /
    apt-get install neuron-kernel
    sync
    reboot
    ----second reboot occurs here----
    sudo su
    mount -o rw,remount /
    apt-get install unipi-modbus-tools
    apt-get install unipi-firmware
    sync
    reboot
    

    This should install the latest firmware, kernel and modbus server. Though unfortunately I really cannot say if that will fix the issue right at this very moment. I'll have a look into the code in the meanwhile, but please do see if the commands can fix the issue.

    I will check the image on our download server to see if I can get it updated. If you do encounter any errors in the installation process then please do post here; the packages are tuned for a standard raspbian image, and may possibly not work properly with the older image from our server.


  • administrators

    Hi @thiagoralves!

    I believe I have now identified the problem. Unfortunately the update above will likely not work (though it should not cause any harm either) - I will have to generate a new version of our kernel driver. This will take approximately 2 days; apologies for any difficulties caused.

    The issue is that the secondary analog output is missing a correct error code for reading, which the primary analog outputs do have. This causes a null pointer dereference and a subsequent crash. That said - the crash occurs because the IIO kernel subsystem does not check for a null pointer value where it is permitted, which it should, so it is possible that a general kernel update (which the commands above will try to perform) may help. However a definitive fix will be creating a dummy method to pass to the subsystem, which is something we should do regardless.

    Thank you for the debugging, and apologies for any problems caused. I should say that aside from reading the particular file there doesn't appear to be anything else wrong with the unit, and it should otherwise perform as expected.



  • Hi Tomas,

    Thank you for the replies. As you said, the procedure actually failed on my UniPian image with an error saying that the neuron-kernel depends on raspberrypi-kernel of a more recent version. In any case, I will try the steps on a clean Raspbian image and check how it behaves.

    In the mean time, are you guys planning to keep that UniPian image up to date? I'm asking this because I instructed OpenPLC users to download that image to install OpenPLC on their Neurons. If that image won't be getting updated regularly, I rather change the installation instructions to be based on a regular Raspbian image.

    Thanks!



  • I've tried the steps on a blank new Raspbian image and encountered the same error while trying to install neuron-kernel:

    root@raspberrypi:/home/pi# apt-get install neuron-kernel
    Reading package lists... Done
    Building dependency tree
    Reading state information... Done
    Some packages could not be installed. This may mean that you have
    requested an impossible situation or if you are using the unstable
    distribution that some required packages have not yet been created
    or been moved out of Incoming.
    The following information may help to resolve the situation:
    
    The following packages have unmet dependencies:
     neuron-kernel : Depends: raspberrypi-kernel (= 1.20180919-1) but 1.20180924-1 is to be installed
    E: Unable to correct problems, you have held broken packages.```

  • administrators

    Apologies, it looks like you will have to use

    apt-get install unipi-kernel-modules-dkms
    

    instead of

    apt-get install neuron-kernel
    

    this will install the module from source, rather than using a precompiled binary.

    The rest of the instructions should work fine. At any rate - we should release a new version tomorrow which should have the bug fixed.



  • Hi Tomas, did you guys released the new UniPian image with the driver fix? If yes, I would like to test it with the OpenPLC driver.

    Thanks!


  • administrators

    Hi @thiagoralves,

    Apologies for the late reply, I was on sick leave for a while.

    It looks like we still haven't released the image, but I'll try poking the people who take care of it a bit. The package installation should now work, however.



  • Alright, thanks! I'll try the package installation on Raspbian and report back if I have any issues.