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diff --git a/docs/3-Usage.md b/docs/3-Usage.md new file mode 100644 index 0000000..bee088e --- /dev/null +++ b/docs/3-Usage.md @@ -0,0 +1,234 @@ +# Install AFB Websocket CLI client to test the binding. + +You can test it using afb-client-demo CLI tool provided by the RPM package *libafbwsc-dev*. + +You can find this package in your build environment, using docker SDK recommended setup the file is `/xdt/build/tmp/deploy/rpm/<your-target-arch>/`. + +After a successful bitbake build and using Renesas RCar Gen2, Porter, you have to copy the file if your board is connected to your network and you know its IP address: + +```bash +$ scp /xdt/build/tmp/deploy/rpm/cortex15hf_neon/libafbwsc-dev-1.0-r0.cortexa15hf_neon.rpm root@<target_IP>:~ +``` + +Else, you have to copy into the SDcard with the AGL image installed on it. + +From the docker image copy RPM to the shared directory between docker image and your host: + +```bash +$ cp /xdt/build/tmp/deploy/rpm/cortex15hf_neon/libafbwsc-dev-1.0-r0.cortexa15hf_neon.rpm ~/share +``` + +Then plugin you SDcard in your Linux host (Windows can't read ext4 filesystem AGL runs on) and copy RPM file on it. + +From your host, identify SDcard block device node here it is **sdc** with the correct capacity automounted by the desktop manager: + +```bash +$ lsblk +loop1 7:1 0 2G 0 loop +└─docker-253:0-3146365-pool 253:3 0 100G 0 dm + └─docker-253:0-3146365-e9f80849a2681e18549d3a4238cbf031e44052e36cd88a0abf041804b799b61c + 253:4 0 10G 0 dm /var/lib/docker/devicemapper/mnt/e9f80849a2681e18549d3a4238cbf031e44052e36cd88a0abf041804b799b61c +sdb 8:16 0 238.5G 0 disk +├─sdb2 8:18 0 238G 0 part +│ └─Shamash-agl 253:1 0 238G 0 lvm /home/claneys/Workspace/agl-docker +└─sdb1 8:17 0 500M 0 part /boot +sr0 11:0 1 1024M 0 rom +loop0 7:0 0 100G 0 loop +└─docker-253:0-3146365-pool 253:3 0 100G 0 dm + └─docker-253:0-3146365-e9f80849a2681e18549d3a4238cbf031e44052e36cd88a0abf041804b799b61c + 253:4 0 10G 0 dm /var/lib/docker/devicemapper/mnt/e9f80849a2681e18549d3a4238cbf031e44052e36cd88a0abf041804b799b61c +sdc 8:32 1 14.9G 0 disk +└─sdc1 8:33 1 2G 0 part /run/media/claneys/97f418a5-612f-44e9-b968-a19505695151 +sda 8:0 0 931.5G 0 disk +├─sda2 8:2 0 500G 0 part +│ ├─Shamash-home 253:2 0 150G 0 lvm /home +│ └─Shamash-root 253:0 0 50G 0 lvm / +└─sda1 8:1 0 16G 0 part [SWAP] +``` + +Copy, still from your host: + +> **CAUTION** Make sure to sync IO with sync command before unplug your SDcard. It could be corrupted if removed before all pending IO aren't done. + +```bash +$ sudo cp ~/devel/docker/share/libafbwsc-dev-1.0-r0.cortexa15hf_neon.rpm /run/media/claneys/97f418a5-612f-44e9-b968-a19505695151/home/root +$ sync +``` + +Insert the modified SDcard in your Porter board and boot from it. You are ready to go. + +## Configure the AGL system + +### Virtual CAN device + + Connected to the target, here is how to load the virtual CAN device driver and set up a new vcan device : + +```bash +# modprobe vcan +# ip link add vcan0 type vcan +# ip link set vcan0 up + ``` + +### CAN device using the USB CAN adapter + +Using real connection to CAN bus of your car using the USB CAN adapter connected to the OBD2 connector. + +Once connected, launch ```dmesg``` command and search which device to use : + +```bash +# dmesg +[...] +[ 131.871441] usb 1-3: new full-speed USB device number 4 using ohci-pci +[ 161.860504] can: controller area network core (rev 20120528 abi 9) +[ 161.860522] NET: Registered protocol family 29 +[ 177.561620] usb 1-3: USB disconnect, device number 4 +[ 191.061423] usb 1-2: USB disconnect, device number 3 +[ 196.095325] usb 1-2: new full-speed USB device number 5 using ohci-pci +[ 327.568882] usb 1-2: USB disconnect, device number 5 +[ 428.594177] CAN device driver interface +[ 1872.551543] usb 1-2: new full-speed USB device number 6 using ohci-pci +[ 1872.809302] usb_8dev 1-2:1.0 can0: firmware: 1.7, hardware: 1.0 +[ 1872.809356] usbcore: registered new interface driver usb_8dev +``` + +Here device is named **can0**. + +This instruction assuming a speed of 500000kbps for your CAN bus, you can try others supported bitrate like 125000, 250000 if 500000 doesn't work: + +```bash +# ip link set can0 type can bitrate 500000 +# ip link set can0 up +# ip link show can0 + can0: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UNKNOWN qlen 10 + link/can + can state ERROR-ACTIVE (berr-counter tx 0 rx 0) restart-ms 0 + bitrate 500000 sample-point 0.875 + tq 125 prop-seg 6 phase-seg1 7 phase-seg2 2 sjw 1 + sja1000: tseg1 1..16 tseg2 1..8 sjw 1..4 brp 1..64 brp-inc 1 + clock 16000000 +``` + +## Configure the binding + +Configure the binding specifying in the JSON configuration file the CAN device(s) that it will to connect to. Edit file */var/lib/afm/applications/low-can-binding/0.1/can_buses.json* and change the CAN device name to the one you have : + +```json +{ + "canbus": "can0" +} +``` + +If you have several specify CAN bus devices use an array: + +```json +{ + "canbus": [ "vcan0", "can0" ] +} +``` + +> **WARNING** Make sure the CAN bus(es) you specify in your configuration file match those specified in your generated source file with the [can-config-generator](http://github.com/iotbzh/can-config-generator). + +## Run it, test it, use it ! + +You can run the binding using **afm-util** tool, here is the classic way to go : + +```bash +# afm-util run low-can-binding@0.1 +1 +``` + +You can find instructions to use afm-util tool [here](http://docs.iot.bzh/docs/apis_services/en/dev/reference/af-main/afm-daemons.html#using-afm-util), as well as documentation about Application Framework. + +But you can't control nor interact with it because you don't know security token that **Application Framework** gaves it at launch. + +So, to test it, it is better to launch the binding manually. In the following example, we will use port **1234** and left empty security token for testing purpose: + +```bash +# afb-daemon --ldpaths=/usr/lib/afb:/var/lib/afm/applications/low-can-binding/0.1/libs/ --rootdir=/var/lib/afm/applications/low-can-binding/0.1/ --port=1234 --token= +NOTICE: binding [/usr/lib/afb/afb-dbus-binding.so] calling registering function afbBindingV1Register +NOTICE: binding /usr/lib/afb/afb-dbus-binding.so loaded with API prefix dbus +NOTICE: binding [/usr/lib/afb/authLogin.so] calling registering function afbBindingV1Register +NOTICE: binding /usr/lib/afb/authLogin.so loaded with API prefix auth +NOTICE: binding [/var/lib/afm/applications/low-can-binding/0.1/libs//low-can-binding.so] calling registering function afbBindingV1Register +NOTICE: binding /var/lib/afm/applications/low-can-binding/0.1/libs//low-can-binding.so loaded with API prefix low-can +NOTICE: Waiting port=1234 rootdir=/var/lib/afm/applications/low-can-binding/0.1/ +NOTICE: Browser URL= http:/*localhost:1234 +NOTICE: vcan0 device opened and reading {binding low-can} +NOTICE: Initialized 1/1 can bus device(s) {binding low-can} +``` + +Then connect to the binding using previously installed ***AFB Websocket CLI*** tool : + +```bash +# afb-client-demo ws://localhost:1234/api?token= +``` + +You will be on an interactive session where you can communicate directly with the binding API. + +The binding provides at this moment 2 verbs, *subscribe* and *unsubscribe*, which can take argument by a JSON **event** object. + +The argument value is the CAN message **generic_name** as described in the JSON file used to generate cpp file for the binding. + +To use the ***AFB Websocket CLI*** tool, a command line will be like the following : + +``` +<api> <verb> <arguments> +``` + +Where: + +- API : ***low-can***. +- Verb : ***subscribe*** or ***unsubscribe*** +- Arguments : ***{ "event": "driver.doors.open" }*** + +### Subscription and unsubscription + +You can ask to subscribe to chosen CAN event with a call to *subscribe* API verb with the CAN messages name as JSON argument. + +> **Note** If no argument is provided, then you'll subscribe to all signals at once. + +For example from a websocket session: + +```json +low-can subscribe { "event": "doors.driver.open" } +ON-REPLY 1:low-can/subscribe: {"jtype":"afb-reply","request":{"status":"success","uuid":"a18fd375-b6fa-4c0e-a1d4-9d3955975ae8"}} +``` + +Subscription and unsubscription can take wildcard in their *event* value. + +To reveive all doors events : + +```json +low-can subscribe { "event" : "doors*" } +ON-REPLY 1:low-can/subscribe: {"jtype":"afb-reply","request":{"status":"success","uuid":"511c872e-d7f3-4f3b-89c2-aa9a3e9fbbdb"}} +``` + +Then you will receive an event each time a CAN message is decoded for the event named *doors.driver.open* + +```json +ON-EVENT low-can/messages.doors.driver.open({"event":"low-can\/messages.doors.driver.open","data":{"name":"messages.doors.driver.open","value":true},"jtype":"afb-event"}) +``` + +Notice that event shows you that the CAN event is named *messages.doors.driver.open* but you ask for event about *doors.driver.open*. + +This is because all CAN messages or diagnostic messages are prefixed by the JSON parent node name, **messages** for CAN messages and **diagnostic_messages** for diagnostic messages like OBD2. + +This will let you subscribe or unsubcribe to all signals at once, not recommended, and better make filter on subscribe operation based upon their type. Examples: + +```json +low-can subscribe { "event" : "*speed*" } --> will subscribe to all messages with speed in their name. Search will be make without prefix for it. +low-can subscribe { "event" : "speed*" } --> will subscribe to all messages begin by speed in their name. Search will be make without prefix for it. +low-can subscribe { "event" : "messages*speed*" } --> will subscribe to all CAN messages with speed in their name. Search will be on prefixed messages here. +low-can subscribe { "event" : "messages*speed" } --> will subscribe to all CAN messages ending with speed in their name. Search will be on prefixed messages here. +low-can subscribe { "event" : "diagnostic*speed*" } --> will subscribe to all diagnostic messages with speed in their name. Search will be on prefixed messages here. +low-can subscribe { "event" : "diagnostic*speed" } --> will subscribe to all diagnostic messages ending with speed in their name. Search will be on prefixed messages here. +``` + +You can stop receiving event from it by unsubscribe the signal the same way you did for subscribe + +```json +low-can unsubscribe { "event": "doors.driver.open" } +ON-REPLY 2:low-can/unsubscribe: {"jtype":"afb-reply","request":{"status":"success"}} +low-can unsubscribe { "event" : "doors*" } +ON-REPLY 3:low-can/unsubscribe: {"jtype":"afb-reply","request":{"status":"success"}} +``` |