UBLOX_EVK_ODIN_W2: network-wifi test crashes

[kimlep01]

Description

UBLOX_EVK_ODIN_W2 target crashes in our nightly CI when running network-wifi test. We have not seen this earlier as the test was running inside of a rf shielded box. Now the tests are running in a very noisy environment which most probably causes these crashes when the Odin tries to connect to the network. I can reproduce the crash from line 1826 when I re-run the test inside the test farm. Does not reproduce on my desk (not enough noise I guess).

More common crash:

[1560302096.85][CONN][RXD] >>> Running case #9: 'WIFI-CONNECT-PARAMS-VALID-UNSECURE'...
[1560302096.98][CONN][INF] found KV pair in stream: {{__testcase_start;WIFI-CONNECT-PARAMS-VALID-UNSECURE}}, queued...
[1560302134.33][CONN][RXD] 
[1560302134.33][CONN][RXD] 
[1560302134.33][CONN][RXD] ++ MbedOS Error Info ++
[1560302134.43][CONN][RXD] Error Status: 0x80FF0144 Code: 324 Module: 255
[1560302134.43][CONN][RXD] Error Message: Assertion failed: msg != NULL
[1560302134.53][CONN][RXD] Location: 0x0
[1560302134.63][CONN][RXD] File: ./targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F439xI/TARGET_MODULE_UBLOX_ODIN_W2/sdk/ublox-odin-w2-drivers/OdinWiFiInterface.cpp+1826
[1560302134.63][CONN][RXD] Error Value: 0x0
[1560302134.83][CONN][RXD] Current Thread: application_unnamed_thread  Id: 0x20010E08 Entry: 0x80E44C1 StackSize: 0x1000 StackMem: 0x20010E60 SP: 0x20011D08 
[1560302134.94][CONN][RXD] For more info, visit: https://mbed.com/s/error?error=0x80FF0144&osver=999999&core=0x410FC241&comp=3&ver=8032001&tgt=UBLOX_EVK_...
[1560302134.94][CONN][RXD] 
[1560302134.94][CONN][RXD] -- MbedOS Error Info --
[1560302134.94][CONN][RXD] 
[1560302135.03][CONN][RXD] = System will be rebooted due to a fatal error =

This crash has happened only in CI runs:

[1560301680.70][CONN][RXD] >>> Running case #9: 'WIFI-CONNECT-PARAMS-VALID-UNSECURE'...
[1560301680.70][CONN][INF] found KV pair in stream: {{__testcase_start;WIFI-CONNECT-PARAMS-VALID-UNSECURE}}, queued...
[1560301708.56][CONN][RXD] 
[1560301708.56][CONN][RXD] 
[1560301708.56][CONN][RXD] ++ MbedOS Error Info ++
[1560301708.66][CONN][RXD] Error Status: 0x80FF0144 Code: 324 Module: 255
[1560301708.66][CONN][RXD] Error Message: Assertion failed: msg != NULL
[1560301708.66][CONN][RXD] Location: 0x801A1A3
[1560301708.86][CONN][RXD] File: ./targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F439xI/TARGET_MODULE_UBLOX_ODIN_W2/sdk/ublox-odin-w2-drivers/OdinWiFiInterface.cpp+1596
[1560301708.86][CONN][RXD] Error Value: 0x0
[1560301708.96][CONN][RXD] Current Thread: application_unnamed_thread  Id: 0x20010890 Entry: 0x8010799 StackSize: 0x1000 StackMem: 0x200108E8 SP: 0x20011490 
[1560301709.16][CONN][RXD] For more info, visit: https://mbed.com/s/error?error=0x8003010F&osver=999999&core=0x410FC241&comp=1&ver=6110004&tgt=UBLOX_EVK_...
[1560301709.16][CONN][RXD] 
[1560301709.16][CONN][RXD] -- MbedOS Error Info --
[1560301709.16][CONN][RXD] 
[1560301709.16][CONN][RXD] = System will be rebooted due to a fatal error =

Edit - found one more crash:

[1560935800.92][CONN][RXD] >>> Running case #8: 'WIFI-GET-RSSI'...
[1560935801.02][CONN][INF] found KV pair in stream: {{__testcase_start;WIFI-GET-RSSI}}, queued...
[1560935823.68][CONN][RXD] 
[1560935823.68][CONN][RXD] 
[1560935823.76][CONN][RXD] ++ MbedOS Error Info ++
[1560935823.76][CONN][RXD] Error Status: 0x80FF0144 Code: 324 Module: 255
[1560935823.86][CONN][RXD] Error Message: Assertion failed: msg->type == ODIN_WIFI_MSG_USER_DISCONNECT
[1560935823.86][CONN][RXD] Location: 0x801A1A3
[1560935824.06][CONN][RXD] File: ./targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F439xI/TARGET_MODULE_UBLOX_ODIN_W2/sdk/ublox-odin-w2-drivers/OdinWiFiInterface.cpp+463
[1560935824.06][CONN][RXD] Error Value: 0x0
[1560935824.16][CONN][RXD] Current Thread: main  Id: 0x2000BA60 Entry: 0x801A791 StackSize: 0x1000 StackMem: 0x200071D8 SP: 0x20008088 
[1560935824.26][CONN][RXD] For more info, visit: https://mbed.com/s/error?error=0x80FF0144&osver=999999&core=0x410FC241&comp=1&ver=6110004&tgt=UBLOX_EVK_...
[1560935824.26][CONN][RXD] 
[1560935824.36][CONN][RXD] -- MbedOS Error Info --
[1560935824.36][CONN][RXD] 
[1560935824.36][CONN][RXD] = System will be rebooted due to a fatal error =

mbed-os version (master):

commit fc645bc3ed357743d4acf6714564b7f6291c6016 (HEAD -> master, origin/master, origin/HEAD)
Merge: ed69fc1 6df6dec
Author: Anna Bridge <Anna.Bridge@arm.com>
Date:   Tue Jun 11 15:07:43 2019 +0100

    Merge pull request #10805 from kjbracey-arm/armc5_blinky

    Fix ARMC5 compilation

The crashes don't seem to be compiler or test case specific. I have seen these crashes with several different wifi tests cases from this same test suite.

How to reproduce:
Use a VERY noisy test environment for Wifi
Edit tools/test_configs/WiFiInterface.json and give proper values for:
wifi-secure-ssid
wifi-unsecure-ssid
wifi-password
wifi-ch-secure
wifi-ch-unsecure

mbed test --compile -t GCC_ARM -m UBLOX_EVK_ODIN_W2 -n tests-network-wifi --app-config=tools/test_configs/WiFiInterface.json -DMBED_HEAP_STATS_ENABLED=1 -DMBED_STACK_STATS_ENABLED=1 -DMBED_TRAP_ERRORS_ENABLED=1 -DMBED_ALL_STATS_ENABLED -DSKIP_TIME_DRIFT_TESTS=1

mbedgt -m UBLOX_EVK_ODIN_W2 -n tests-network-wifi -V
(crashes 2/3 times in our environment)

Issue request type

[ ] Question
[ ] Enhancement
[X] Bug

[kimlep01]

cc @ARMmbed/team-ublox

[ciarmcom]

Internal Jira reference: https://jira.arm.com/browse/MBOCUSTRIA-1279

[aqib-ublox]

@kimlep01 wifi logs.txt

I am not able to reproduce above scnerio even removed two antennas of AP out of three no crash seen

[aqib-ublox]

@kimlep01 have you tried with ARM and IAR also?

I coundn't see it

[kimlep01]

Yes we run those tests with GCC, ARM and IAR binaries. I have seen crashes with all compilers. I was hoping that those line numbers would help tracking down why those assert failures happen. We have similar issues open with mtb ublox odin w2 also. My guess is that something goes wrong when the board tries to connect to a heavily utilised access point.

[kimlep01]

Hi @ARMmbed/team-ublox

This issue is still visible in our nightly tests. I have been able to reproduce this issue manually on my desk also:

• I set my phone (old Samsung S6) as an unsecure Wi-Fi hotspot
• Place the phone next to the board
• Comment out all other wifi tests except WIFI-CONNECT-DISCONNECT-REPEAT from /TESTS/network/wifi/main.cpp
• Compiled tests with IAR 8.32.1

I ran the test a few times and got these three different crashes:

[1566820165.73][CONN][RXD] >>> Running 1 test cases...
[1566820165.79][CONN][RXD]
[1566820165.79][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1566820165.85][CONN][RXD] >>> Running case #1: 'WIFI-CONNECT-DISCONNECT-REPEAT'...
[1566820165.90][CONN][INF] found KV pair in stream: {{__testcase_start;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1566820228.01][CONN][RXD]
[1566820228.01][CONN][RXD]
[1566820228.03][CONN][RXD] ++ MbedOS Error Info ++
[1566820228.08][CONN][RXD] Error Status: 0x80FF0144 Code: 324 Module: 255
[1566820228.15][CONN][RXD] Error Message: Assertion failed: error_code == cbSTATUS_OK
[1566820228.16][CONN][RXD] Location: 0x0
[1566820228.31][CONN][RXD] File: ./targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F439xI/TARGET_MODULE_UBLOX_ODIN_W2/sdk/ublox-odin-w2-drivers/OdinWiFiInterface.cpp+761
[1566820228.32][CONN][RXD] Error Value: 0x0
[1566820228.47][CONN][RXD] Current Thread: application_unnamed_thread  Id: 0x20008818 Entry: 0x80E3869 StackSize: 0x1000 StackMem: 0x20011990 SP: 0x200128F0
[1566820228.55][CONN][RXD] For more info, visit: https://mbed.com/s/error?error=0x80FF0144&tgt=UBLOX_EVK_ODIN_W2
[1566820228.58][CONN][RXD] -- MbedOS Error Info --
[1566820228.58][CONN][RXD]
[1566820228.63][CONN][RXD] = System will be rebooted due to a fatal error =

----

[1566821982.25][CONN][RXD] >>> Running 1 test cases...
[1566821982.30][CONN][RXD]
[1566821982.30][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1566821982.36][CONN][RXD] >>> Running case #1: 'WIFI-CONNECT-DISCONNECT-REPEAT'...
[1566821982.42][CONN][INF] found KV pair in stream: {{__testcase_start;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1566821994.93][CONN][RXD]
[1566821994.93][CONN][RXD]
[1566821994.96][CONN][RXD] ++ MbedOS Error Info ++
[1566821995.00][CONN][RXD] Error Status: 0x80FF0144 Code: 324 Module: 255
[1566821995.08][CONN][RXD] Error Message: Assertion failed: msg->type == ODIN_WIFI_MSG_USER_DISCONNECT
[1566821995.10][CONN][RXD] Location: 0x0
[1566821995.25][CONN][RXD] File: ./targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F439xI/TARGET_MODULE_UBLOX_ODIN_W2/sdk/ublox-odin-w2-drivers/OdinWiFiInterface.cpp+463
[1566821995.27][CONN][RXD] Error Value: 0x0
[1566821995.37][CONN][RXD] Current Thread: main  Id: 0x2000BA5C Entry: 0x80E91C9 StackSize: 0x1000 StackMem: 0x200052B0 SP: 0x200061B0
[1566821995.46][CONN][RXD] For more info, visit: https://mbed.com/s/error?error=0x80FF0144&tgt=UBLOX_EVK_ODIN_W2
[1566821995.49][CONN][RXD] -- MbedOS Error Info --
[1566821995.49][CONN][RXD]
[1566821995.55][CONN][RXD] = System will be rebooted due to a fatal error =

----

[1566822170.93][CONN][RXD] >>> Running 1 test cases...
[1566822170.99][CONN][RXD]
[1566822170.99][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1566822171.05][CONN][RXD] >>> Running case #1: 'WIFI-CONNECT-DISCONNECT-REPEAT'...
[1566822171.10][CONN][INF] found KV pair in stream: {{__testcase_start;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1566822187.21][CONN][RXD]
[1566822187.21][CONN][RXD]
[1566822187.24][CONN][RXD] ++ MbedOS Error Info ++
[1566822187.28][CONN][RXD] Error Status: 0x80FF0144 Code: 324 Module: 255
[1566822187.34][CONN][RXD] Error Message: Assertion failed: error_code == cbSTATUS_OK
[1566822187.36][CONN][RXD] Location: 0x0
[1566822187.51][CONN][RXD] File: ./targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F439xI/TARGET_MODULE_UBLOX_ODIN_W2/sdk/ublox-odin-w2-drivers/OdinWiFiInterface.cpp+782
[1566822187.53][CONN][RXD] Error Value: 0x0
[1566822187.66][CONN][RXD] Current Thread: application_unnamed_thread  Id: 0x20008818 Entry: 0x80E3869 StackSize: 0x1000 StackMem: 0x20011990 SP: 0x20012908
[1566822187.75][CONN][RXD] For more info, visit: https://mbed.com/s/error?error=0x80FF0144&tgt=UBLOX_EVK_ODIN_W2
[1566822187.78][CONN][RXD] -- MbedOS Error Info --
[1566822187.78][CONN][RXD]
[1566822187.83][CONN][RXD] = System will be rebooted due to a fatal error =

mbed-os commit:

commit 02d1873c06255220faa0c1cabfc3b14696181c89 (HEAD -> master, origin/master, origin/HEAD)
Merge: b005bf2 1ab75d3
Author: Martin Kojtal <martin.kojtal@arm.com>
Date:   Mon Aug 26 11:08:47 2019 +0200
    Merge pull request #11266 from u-blox/feature_adc_temp_conf
    ADC internal temperature support and EMAC header fix

Contents of my mbed_app.json used (just password and unsecure AP name changed from our CI mbed_app.json):

{
 "config": {
   "wifi-secure-ssid": {
     "help": "WiFi SSID for WPA2 secured network",
     "value": "\"4tousnet\""
   },
   "wifi-unsecure-ssid": {
     "help": "WiFi SSID for unsecure netwrok",
     "value": "\"qwerty123\""
   },
   "wifi-password": {
     "help": "WiFi Password",
     "value": "\"secret\""
   },
   "wifi-secure-protocol": {
     "help": "WiFi security protocol, valid values are WEP, WPA, WPA2, WPA/WPA2",
     "value": "\"WPA2\""
   },
   "wifi-ch-secure": {
     "help": "Channel number of secure SSID",
     "value": 10
   },
   "wifi-ch-unsecure": {
     "help": "Channel number of unsecure SSID",
     "value": 2
   },
   "ap-mac-secure": {
     "help": "BSSID of secure AP in form of AA:BB:CC:DD:EE:FF",
     "value": "\"80:2a:a8:8a:e9:13\""
   },
   "ap-mac-unsecure": {
     "help": "BSSID of unsecure AP in form of \"AA:BB:CC:DD:EE:FF\"",
     "value": "\"58:8b:f3:99:c2:08\""
   },
   "max-scan-size": {
     "help": "How many networks may appear in Wifi scan result",
     "value": 30
   },
   "echo-server-addr": {
     "help": "IP address of echo server",
     "value": "\"echo.mbedcloudtesting.com\""
   },
   "echo-server-port": {
     "help": "Port of echo server",
     "value": "7"
   },
   "echo-server-discard-port": {
     "help": "Discard port of echo server",
     "value": "9"
   },
   "echo-server-port-tls": {
     "help": "Port of echo server for TLS",
     "value": "2007"
   },
   "echo-server-discard-port-tls": {
     "help": "Discard port of echo server for TLS",
     "value": "2009"
   }
 },
 "target_overrides": {
   "*": {
     "lwip.ipv4-enabled": true,
     "lwip.ipv6-enabled": false,
     "nsapi.default-wifi-ssid": "MBED_CONF_APP_WIFI_SECURE_SSID",
     "nsapi.default-wifi-password": "MBED_CONF_APP_WIFI_PASSWORD",
     "nsapi.default-wifi-security": "WPA_WPA2",
     "target.components_add": ["FPGA_CI_TEST_SHIELD"]
   },
   "K66F": {
     "events.shared-stacksize": 2048,
     "esp8266.provide-default": true,
     "target.network-default-interface-type": "WIFI",
     "esp8266.tx": "PTC4",
     "esp8266.rx": "PTC3",
     "esp8266.rts": "PTC1",
     "esp8266.cts": "PTC2",
     "esp8266.rst": "D8"
   },
   "NUCLEO_F401RE": {
     "idw0xx1.provide-default": true,
     "idw0xx1.tx": "D8",
     "idw0xx1.rx": "D2",
     "drivers.uart-serial-txbuf-size": 512,
     "drivers.uart-serial-rxbuf-size": 512
   },
   "DISCO_L475VG_IOT01A": {
     "ism43362.provide-default": true,
     "target.network-default-interface-type": "WIFI"
   },
   "SDT64B": {
     "target.components_add": ["SD"],
     "sd.SPI_MOSI": "PTB16",
     "sd.SPI_MISO": "PTB17",
     "sd.SPI_CLK": "PTB11",
     "sd.SPI_CS": "PTB10"
   },
   "UBLOX_EVK_ODIN_W2": {
     "target.network-default-interface-type": "WIFI"
   },
   "GR_LYCHEE": {
     "target.network-default-interface-type": "WIFI"
   }
 }
}

[aqib-ublox]

@kimlep01 Ok we will generate fix in next PR

[michalpasztamobica]

The error codes identical as in #9621 . The code line has changed. Perhaps that will help?

[aqib-ublox]

@kimlep01 #11370 generate please verify

[kimlep01]

Still managed to reproduce the crash. Same mbed_app.json used as above, edited main.cpp to run CONNECT-DISCONNECT-REPEAT 20 times in a row, compiled with IAR 8.32.1 and ran on my desk with my phone as a Wi-Fi hotspot. Crash happened on the third time.

Logs:

[1567072488.16][HTST][INF] CALLBACKs updated
[1567072488.16][HTST][INF] host test detected: default_auto
[1567072488.19][CONN][RXD] >>> Running 20 test cases...
[1567072488.25][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072488.30][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072488.36][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072488.41][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072488.46][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072488.52][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072488.58][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072488.63][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072488.68][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072488.73][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072488.79][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072488.85][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072488.90][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072488.95][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072489.00][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072489.06][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072489.12][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072489.17][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072489.22][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072489.28][CONN][RXD]
[1567072489.28][CONN][INF] found KV pair in stream: {{__testcase_name;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072489.33][CONN][RXD] >>> Running case #1: 'WIFI-CONNECT-DISCONNECT-REPEAT'...
[1567072489.40][CONN][INF] found KV pair in stream: {{__testcase_start;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072509.63][CONN][INF] found KV pair in stream: {{__testcase_finish;WIFI-CONNECT-DISCONNECT-REPEAT;1;0}}, queued...
[1567072509.68][CONN][RXD] >>> 'WIFI-CONNECT-DISCONNECT-REPEAT': 1 passed, 0 failed
[1567072509.68][CONN][RXD]
[1567072509.75][CONN][RXD] >>> Running case #2: 'WIFI-CONNECT-DISCONNECT-REPEAT'...
[1567072509.81][CONN][INF] found KV pair in stream: {{__testcase_start;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072525.13][CONN][INF] found KV pair in stream: {{__testcase_finish;WIFI-CONNECT-DISCONNECT-REPEAT;1;0}}, queued...
[1567072525.19][CONN][RXD] >>> 'WIFI-CONNECT-DISCONNECT-REPEAT': 1 passed, 0 failed
[1567072525.19][CONN][RXD]
[1567072525.25][CONN][RXD] >>> Running case #3: 'WIFI-CONNECT-DISCONNECT-REPEAT'...
[1567072525.30][CONN][INF] found KV pair in stream: {{__testcase_start;WIFI-CONNECT-DISCONNECT-REPEAT}}, queued...
[1567072594.28][CONN][RXD]
[1567072594.28][CONN][RXD]
[1567072594.32][CONN][RXD] ++ MbedOS Error Info ++
[1567072594.36][CONN][RXD] Error Status: 0x80FF0144 Code: 324 Module: 255
[1567072594.42][CONN][RXD] Error Message: Assertion failed: error_code == cbSTATUS_OK
[1567072594.44][CONN][RXD] Location: 0x0
[1567072594.58][CONN][RXD] File: ./targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F439xI/TARGET_MODULE_UBLOX_ODIN_W2/sdk/ublox-odin-w2-drivers/OdinWiFiInterface.cpp+761
[1567072594.59][CONN][RXD] Error Value: 0x0
[1567072594.74][CONN][RXD] Current Thread: application_unnamed_thread  Id: 0x20008A5C Entry: 0x80DFAD5 StackSize: 0x1000 StackMem: 0x20012300 SP: 0x20013260
[1567072594.82][CONN][RXD] For more info, visit: https://mbed.com/s/error?error=0x80FF0144&tgt=UBLOX_EVK_ODIN_W2
[1567072594.85][CONN][RXD] -- MbedOS Error Info --
[1567072594.85][CONN][RXD]
[1567072594.90][CONN][RXD] = System will be rebooted due to a fatal error =
^Cmbedgt: ctrl+c keyboard interrupt!
kimlep01@e109827-lin:~/dev/git_repos/mbed-os$ git log -1
commit 7f36fbc86ee54ddcd3e37e7a55681b89409d7533 (HEAD -> ublox-pr-29-08)
Author: aqib-ublox <aqib.nasim@u-blox.com>
Date:   Thu Aug 29 11:33:29 2019 +0500

    Driver Updates + ARMC6 driver support + wifi fixes
kimlep01@e109827-lin:~/dev/git_repos/mbed-os$