# MangOH yellow CAN Iot Bus not working **URL:** \ **Category:** mangOH Yellow\ **Created:** [September 18, 2020, 1:47pm UTC](https://mangoh.discourse.group/t/mangoh-yellow-can-iot-bus-not-working/5245 "2020-09-18T13:47:27Z")\ **Posts on this page:** 10\ **Page:** 2
**Author:** ![Antoine](https://avatars.discourse-cdn.com/v4/letter/a/7ab992/32.png) [@Antoine](https://mangoh.discourse.group/u/Antoine)\ **Post date:** [September 24, 2020, 12:11pm UTC](https://mangoh.discourse.group/t/mangoh-yellow-can-iot-bus-not-working/5245/21 "2020-09-24T12:11:57Z")
Thanks ! I’m gonna try this out. ---
**Author:** ![Antoine](https://avatars.discourse-cdn.com/v4/letter/a/7ab992/32.png) [@Antoine](https://mangoh.discourse.group/u/Antoine)\ **Post date:** [September 24, 2020, 12:29pm UTC](https://mangoh.discourse.group/t/mangoh-yellow-can-iot-bus-not-working/5245/22 "2020-09-24T12:29:35Z")
When i follow the step on github i get the following error : > Poky (Yocto Project Reference Distro) SDK installer version 2.5.3 > ================================================================= > Enter target directory for SDK (default: /opt/swi/SWI9X06Y\_02.35.02.00): > The directory “/opt/swi/SWI9X06Y\_02.35.02.00” already contains a SDK for this architecture. > If you continue, existing files will be overwritten! Proceed[y/N]? y > [sudo] password for antoine: > Sorry, try again. > [sudo] password for antoine: > Extracting SDK…done > Setting it up…done > HOSTLD scripts/dtc/dtc > /usr/bin/ld: scripts/dtc/dtc-parser.tab.o:(.bss+0x50): multiple definition of `yylloc’; scripts/dtc/dtc-lexer.lex.o:(.bss+0x0): first defined here > collect2: error: ld returned 1 exit status > make[2]: \*\*\* [scripts/Makefile.host:100: scripts/dtc/dtc] Error 1 > make[1]: \*\*\* [scripts/Makefile.build:402: scripts/dtc] Error 2 > make: \*\*\* [Makefile:559: scripts] Error 2 > “Failed to install driver build environment.” By the way i didn’t see the line : > // Uncomment to include support for the CAN IoT card > #include “sinc/can\_iot\_card.sinc” in the yellow.sdef file ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [September 25, 2020, 1:33am UTC](https://mangoh.discourse.group/t/mangoh-yellow-can-iot-bus-not-working/5245/23 "2020-09-25T01:33:53Z")
you can try to add that line in yellow.sdef. BTW, I don’t see problem to install toolchain in ubuntu 16, maybe you can try without the sudo: * * * # owner@owner-ThinkPad-X220:~/Downloads$ sh poky-swi-ext-glibc-x86\_64-meta-toolchain-swi-armv7a-neon-toolchain-swi-SWI9X06Y\_02.35.02.00.sh Poky (Yocto Project Reference Distro) SDK installer version 2.5.3 Enter target directory for SDK (default: /opt/swi/SWI9X06Y\_02.35.02.00): You are about to install the SDK to “/opt/swi/SWI9X06Y\_02.35.02.00”. Proceed[Y/n]? Extracting SDK…done Setting it up…done HOSTCC scripts/basic/fixdep HOSTCC scripts/basic/bin2c HOSTCC scripts/dtc/dtc.o HOSTCC scripts/dtc/flattree.o HOSTCC scripts/dtc/fstree.o HOSTCC scripts/dtc/data.o HOSTCC scripts/dtc/livetree.o HOSTCC scripts/dtc/treesource.o HOSTCC scripts/dtc/srcpos.o HOSTCC scripts/dtc/checks.o HOSTCC scripts/dtc/util.o SHIPPED scripts/dtc/dtc-lexer.lex.c SHIPPED scripts/dtc/dtc-parser.tab.h HOSTCC scripts/dtc/dtc-lexer.lex.o SHIPPED scripts/dtc/dtc-parser.tab.c HOSTCC scripts/dtc/dtc-parser.tab.o HOSTLD scripts/dtc/dtc CC scripts/mod/empty.o HOSTCC scripts/mod/mk\_elfconfig MKELF scripts/mod/elfconfig.h HOSTCC scripts/mod/modpost.o CC scripts/mod/devicetable-offsets.s GEN scripts/mod/devicetable-offsets.h HOSTCC scripts/mod/file2alias.o HOSTCC scripts/mod/sumversion.o HOSTLD scripts/mod/modpost HOSTCC scripts/kallsyms HOSTCC scripts/conmakehash HOSTCC scripts/sortextable HOSTCC scripts/asn1\_compiler SDK has been successfully set up and is ready to be used. Each time you wish to use the SDK in a new shell session, you need to source the environment setup script e.g. . /opt/swi/SWI9X06Y\_02.35.02.00/environment-setup-armv7a-neon-poky-linux-gnueabi owner@owner-ThinkPad-X220:~/Downloads lsb\_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 16.04.7 LTS Release: 16.04 Codename: xenial ---
**Author:** ![Antoine](https://avatars.discourse-cdn.com/v4/letter/a/7ab992/32.png) [@Antoine](https://mangoh.discourse.group/u/Antoine)\ **Post date:** [September 25, 2020, 7:52am UTC](https://mangoh.discourse.group/t/mangoh-yellow-can-iot-bus-not-working/5245/24 "2020-09-25T07:52:39Z")
Ok i will do that. I’m on Manjaro (Arch) with kernel version 5.8.6-1. Apparently the error was patched on April 1st 2020 according to this site : > **[LKML: Greg Kroah-Hartman: \[PATCH 4.4 57/91\] scripts/dtc: Remove redundant...](https://lkml.org/lkml/2020/4/1/1206)** Do you think i need to downgrade my kernel version ? ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [September 25, 2020, 7:58am UTC](https://mangoh.discourse.group/t/mangoh-yellow-can-iot-bus-not-working/5245/25 "2020-09-25T07:58:08Z")
No idea, never used that platform, the easiest way is to use vmware to install ubuntu 16 ---
**Author:** ![Antoine](https://avatars.discourse-cdn.com/v4/letter/a/7ab992/32.png) [@Antoine](https://mangoh.discourse.group/u/Antoine)\ **Post date:** [September 25, 2020, 2:10pm UTC](https://mangoh.discourse.group/t/mangoh-yellow-can-iot-bus-not-working/5245/26 "2020-09-25T14:10:48Z")
Sorry to bother you again but after making an Ubuntu 16.04 VM and perform a > make wp77xx On the legato folder i run in this error : > FAILED: /opt/swi/SWI9X06Y\_02.35.02.00/sysroots/x86\_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-gcc --sysroot=/opt/swi/SWI9X06Y\_02.35.02.00/sysroots/armv7a-neon-poky-linux-gnueabi -Wl,–build-id -g -fPIE -pie -o /home/antoine/workspace/legato/build/wp77xx/system/app/tools/obj/uartMode/uartMode /home/antoine/workspace/legato/build/wp77xx/system/app/tools/obj/uartMode/\_main.c.o -rdynamic -Wl,–enable-new-dtags,-rpath=“$ORIGIN/…/lib” -L “-L/home/antoine/workspace/legato/build/wp77xx/system/component/b9207a259d5769887eee535ca45fc7be/obj” -lComponent\_uartMode -L/home/antoine/workspace/legato/platformAdaptor/qmi/bin/wp77xx/components/le\_pa\_uartMode -lComponent\_le\_pa\_uartMode -L/home/antoine/workspace/legato/platformAdaptor/qmi/bin/wp77xx/components/swiQmi -lComponent\_swiQmi “-L/home/antoine/workspace/legato/build/wp77xx/system/component/e559a2fbca3749281735b4701b26b9fd/obj” -lComponent\_le\_pa\_uartMode\_default “-L/home/antoine/workspace/legato/build/wp77xx/system/component/b9207a259d5769887eee535ca45fc7be/obj” -lComponent\_uartMode -L/home/antoine/workspace/legato/platformAdaptor/qmi/bin/wp77xx/components/le\_pa\_uartMode -lComponent\_le\_pa\_uartMode -L/home/antoine/workspace/legato/platformAdaptor/qmi/bin/wp77xx/components/swiQmi -lComponent\_swiQmi “-L/home/antoine/workspace/legato/build/wp77xx/system/component/e559a2fbca3749281735b4701b26b9fd/obj” -lComponent\_le\_pa\_uartMode\_default “-L$LEGATO\_BUILD/framework/lib” -llegato -lpthread -lrt -ldl -lm -g && splitdebug -d /home/antoine/workspace/legato/build/wp77xx/debug /home/antoine/workspace/legato/build/wp77xx/system/app/tools/obj/uartMode/uartMode > /home/antoine/workspace/legato/platformAdaptor/qmi/bin/wp77xx/components/swiQmi/libComponent\_swiQmi.so: undefined reference to `fcntl@GLIBC\_2.28’ > collect2: error: ld returned 1 exit status > [843/1070] Compiling C source > ninja: build stopped: subcommand failed. > Makefile:551: recipe for target ‘system’ failed > make: \*\*\* [system] Error 1 Do you have any idea ? ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [September 26, 2020, 7:36am UTC](https://mangoh.discourse.group/t/mangoh-yellow-can-iot-bus-not-working/5245/27 "2020-09-26T07:36:51Z")
no, i don’t see such problem, i can compile the legato.cwe: owner@owner-ThinkPad-X220:~/Downloads/legato-19.11.2$ ls ./build/wp77xx/legato.cwe -l lrwxrwxrwx 1 owner owner 23 Sep 26 15:58 ./build/wp77xx/legato.cwe -\> legato-squashfs.ubi.cwe owner@owner-ThinkPad-X220:~/Downloads/legato-19.11.2$ export | grep “WP77” declare -x WP77XX\_KERNELROOT="/opt/swi/SWI9X06Y\_02.35.02.00/sysroots/armv7a-neon-poky-linux-gnueabi/usr/src/kernel" declare -x WP77XX\_SYSROOT="/opt/swi/SWI9X06Y\_02.35.02.00/sysroots/armv7a-neon-poky-linux-gnueabi" declare -x WP77XX\_TOOLCHAIN\_DIR="/opt/swi/SWI9X06Y\_02.35.02.00/sysroots/x86\_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi" declare -x WP77XX\_TOOLCHAIN\_PREFIX=“arm-poky-linux-gnueabi-” owner@owner-ThinkPad-X220:~/Downloads/legato-19.11.2$ ---
**Author:** ![Antoine](https://avatars.discourse-cdn.com/v4/letter/a/7ab992/32.png) [@Antoine](https://mangoh.discourse.group/u/Antoine)\ **Post date:** [October 1, 2020, 9:17am UTC](https://mangoh.discourse.group/t/mangoh-yellow-can-iot-bus-not-working/5245/28 "2020-10-01T09:17:20Z")
I tried to clone 19.11.2 version (yours) but i got the same problem. in addition i have some questions about the tutorial you gived me (this one [https://github.com/mangOH/mangOH](https://github.com/mangOH/mangOH)) : In the I.iv part it says you have to install the toolchain in a specific dir, do i have to sepcify the same of not ? Does this care ? And if it cares, which yocto version is used in legato framework ? When i’m trying to build to legato framework after cloning the repo (according to this tutorial [https://github.com/legatoproject/legato-af/blob/master/README.md](https://github.com/legatoproject/legato-af/blob/master/README.md) in the " Install the Legato framework on your development PC") i encountered an error while it builds the doc. Is there any important build stage after the documentation build step or can i stop it there and continue the tutorial ? Sorry if my questions are stupids i’m a complete rookie 😕 I checked the environment variables with the same command, i have the same results but i’m keep getting the same error. Btw i try this with the latest version of legato not with the 19.11.2 and my toolchain version is SWI9X06Y\_02.35.02.00. ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [October 1, 2020, 10:42am UTC](https://mangoh.discourse.group/t/mangoh-yellow-can-iot-bus-not-working/5245/29 "2020-10-01T10:42:59Z")
Normally i install the toolchain to /opt/swi folder ---
**Author:** ![Antoine](https://avatars.discourse-cdn.com/v4/letter/a/7ab992/32.png) [@Antoine](https://mangoh.discourse.group/u/Antoine)\ **Post date:** [October 1, 2020, 11:57am UTC](https://mangoh.discourse.group/t/mangoh-yellow-can-iot-bus-not-working/5245/30 "2020-10-01T11:57:15Z")
Yes i did that. I try the 19.11.2 version of legato and it seems to work. Thanks for your help ! [Previous page](https://mangoh.discourse.group/t/mangoh-yellow-can-iot-bus-not-working/5245.md?page=1)