Add some notes

docs/readmeCanOpenSocket.md

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+
+
+git clone https://github.com/linux-can/can-utils
+cd can-utils
+make
+sudo make install
+
+
+git clone git https://github.com/CANopenNode/CANopenSocket.git
+cd CANopenSocket
+git submodule init
+git submodule update
+cd tools
+./get_tools.sh
+
+
+cd CANopenNode
+make
+
+update gcc if needed (if error at __has_include):
+sudo yum install centos-release-scl
+sudo yum install devtoolset-7-gcc*
+scl enable devtoolset-7 bash
+which gcc
+gcc --version
+
+fatal error: bits/getopt_core.h:
+Modify CO_main_basic.c:
+//#include <bits/getopt_core.h>
+#include <getopt.h>
+
+
+Follow this to test:
+https://github.com/CANopenNode/CANopenNode/blob/master/doc/gettingStarted.md
+sudo modprobe vcan
+sudo ip link add dev vcan0 type vcan
+sudo ip link set up vcan0
+
+
+candump vcan0
+./canopend --help
+./canopend vcan0 -i 4 -s od4_storage -a od4_storage_auto
+Seems not suppoer "-a" option so remove that:
+./canopend vcan0 -i 4 -s od4_storage
+
+update 
+
+
+Checkout master of CanopenNode to make it work like in gettingStarted.md
+
+needed to use this as the canid 1 device:
+echo "-" > od1_storage
+echo "-" > od1_storage_auto
+./canopend vcan0 -i 1 -c "stdio" -s od1_storage -a od1_storage_auto
+