Separation Generator to a dedicated repo

Change-Id: Id94831651c3266861435272a6e36c7884bef2c45
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

1 files changed, 0 insertions, 435 deletions

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-# OpenXC JSON Message Format
-
-Each JSON message published by a VI is delimited with a `\0 ` character.
-
-## Table of Contents
-1. [Vehicle Messages](#vehicle-messages)
-2. [CAN Message](#can-message)
-3. [Diagnostic Message](#diagnostic-message)
-4. [Commands](#commands)
-5. [Extra Values](#extra-values)
-
-## Vehicle Messages
-
-### Simple Vehicle Message
-
-There may not be a 1:1 relationship between input and output signals - i.e.
-engine timing CAN signals may be summarized in an "engine performance" metric on
-the abstract side of the interface.
-
-The expected format of a single valued message is:
-
-    {"name": "steering_wheel_angle", "value": 45}
-
-### Evented Simple Vehicle Message
-
-The expected format of an event message is:
-
-    {"name": "button_event", "value": "up", "event": "pressed"}
-
-This format is good for something like a button event, where there are two
-discrete pieces of information in the measurement.
-
-## CAN Message
-
-The format for a plain CAN message:
-
-    {"bus": 1, "id": 1234, "data": "0x12345678"}
-
-**bus** - the numerical identifier of the CAN bus where this message originated,
-  most likely 1 or 2 (for a vehicle interface with 2 CAN controllers).
-
-**id** - the CAN message ID
-
-**data** - up to 8 bytes of data from the CAN message's payload, represented as
-  a hexidecimal number in a string. Many JSON parser cannot handle 64-bit
-  integers, which is why we are not using a numerical data type. Each byte in
-  the string *must* be represented with 2 characters, e.g. `0x1` is `0x01` - the
-  complete string must have an even number of characters. The `0x` prefix is
-  optional.
-
-**format** - (optional) explicitly set the frame format for the CAN message, one
-  of `standard` or `extended`. If the `id` is greater than `0x7ff`, the extended
-  frame format will be selected automatically.
-
-## Diagnostic Message
-
-### Requests
-
-A diagnostic request is added or cancelled with a JSON object like this example:
-
-    { "command": "diagnostic_request",
-      "action": "add",
-      "diagnostic_request": {
-          "bus": 1,
-          "message_id": 1234,
-          "mode": 1,
-          "pid": 5,
-          "payload": "0x1234",
-          "multiple_responses": false,
-          "frequency": 1,
-          "name": "my_pid"
-        }
-      }
-    }
-
-* The `command` must be `diagnostic_request.`
-* The `action` must be included, and must be one of:
-    * `add` - create a new one-off or recurring diagnostic request.
-    * `cancel` - cancel an existing request.
-* The details of the request must be included in the `request` field, using
-  the sub-fields defined below.
-
-A diagnostic request's `bus`, `id`, `mode` and `pid` (or lack of a `pid`)
-combine to create a unique key to identify a request. These four fields will be
-referred to as the key of the diagnostic request. For example, to create a
-simple one-time diagnostic request:
-
-    { "command": "diagnostic_request",
-      "action": "add",
-      "diagnostic_request": {
-          "bus": 1,
-          "message_id": 1234,
-          "mode": 1,
-          "pid": 5
-        }
-      }
-    }
-
-Requests are completed after any responses are received (unless
-`multiple_responses` is set), or the request has timed out after a certain
-number of seconds. After a request is completed, you can re-`create` the same
-key to make another request.
-
-Requests with a `frequency` are added as *recurring* requests, e.g. to add the
-previous example as a recurring request at 1Hz:
-
-    { "command": "diagnostic_request",
-      "action": "add",
-      "diagnostic_request": {
-          "bus": 1,
-          "message_id": 1234,
-          "mode": 1,
-          "pid": 5,
-          "frequency": 1
-        }
-      }
-    }
-
-To cancel a recurring request, send a `cancel` action with the same key, e.g.:
-
-    { "command": "diagnostic_request",
-      "action": "cancel",
-      "diagnostic_request": {
-          "bus": 1,
-          "message_id": 1234,
-          "mode": 1,
-          "pid": 5
-        }
-      }
-    }
-
-Simultaneous recurring requests for the same key at different rates (e.g. 1Hz
-*and* 2Hz) is not supported. However, non-recurring ("one-off") requests may
-exist in parallel with a recurring request for the same key.
-
-**bus** - the numerical identifier of the CAN bus where this request should be
-    sent, most likely 1 or 2 (for a vehicle interface with 2 CAN controllers).
-
-**message_id** - the CAN message ID for the request.
-
-**mode** - the OBD-II mode of the request - 0x1 through 0xff (1 through 9 are the
-    standardized modes and 0x22 is a common proprietary mode).
-
-**pid** - (optional) the PID for the request, if applicable.
-
-**payload** - (optional) up to 7 bytes of data for the request's payload
-    represented as a hexadecimal number in a string. Many JSON parser cannot
-    handle 64-bit integers, which is why we are not using a numerical data type.
-    Each byte in the string *must* be represented with 2 characters, e.g. `0x1`
-    is `0x01` - the complete string must have an even number of characters. The
-    `0x` prefix is optional.
-
-**name** - (optional, defaults to nothing) A human readable, string name for
-  this request. If provided, the response will have a `name` field (much like a
-  simple vehicle message) with this value in place of `bus`, `id`, `mode` and
-  `pid`.
-
-**multiple_responses** - (optional, false by default) if true, request will stay
-  active for a full 100ms, even after receiving a diagnostic response message.
-  This is useful for requests to the functional broadcast message ID
-  (`0x7df`) when you need to get responses from multiple modules. It's possible
-  to set this to `true` for non-broadcast requests, but in practice you won't
-  see any additional responses after the first and it will just take up memory
-  in the VI for longer.
-
-**frequency** - (optional) Make this request a recurring request, at a this
-  frequency in Hz. To send a single non-recurring request, leave this field out.
-
-**decoded_type** - (optional, defaults to "obd2" if the request is a recognized
-OBD-II mode 1 request, otherwise "none") If specified, the valid values are
-`"none"` and `"obd2"`. If `obd2`, the payload will be decoded according to the
-OBD-II specification and returned in the `value` field. Set this to `none` to
-manually override the OBD-II decoding feature for a known PID.
-
-### Responses
-
-Requests to add or cancel a diagnostic request are first acknowledged by the VI,
-before any responses to the request are returned. The response uses the standard
-command response format:
-
-    { "command_response": "diagnostic_request", "status": true}
-
-**status** - true if the request was successfully created or cancelled.
-
-When a node on the network response to the request and the result is published
-by the VI, the result looks like:
-
-    {"bus": 1,
-      "message_id": 1234,
-      "mode": 1,
-      "pid": 5,
-      "success": true,
-      "payload": "0x1234",
-      "value": 4660}
-
-and to an unsuccessful request, with the `negative_response_code` and no `pid`
-echo:
-
-    {"bus": 1,
-      "message_id": 1234,
-      "mode": 1,
-      "success": false,
-      "negative_response_code": 17}
-
-**bus** - the numerical identifier of the CAN bus where this response was
-    received.
-
-**message_id** - the CAN message ID for this response.
-
-**mode** - the OBD-II mode of the original diagnostic request.
-
-**pid** - (optional) the PID for the request, if applicable.
-
-**success** -  true if the response received was a positive response. If this
-  field is false, the remote node returned an error and the
-  `negative_response_code` field should be populated.
-
-**negative_response_code** - (optional)  If requested node returned an error,
-    `success` will be `false` and this field will contain the negative response
-    code (NRC).
-
-Finally, the `payload` and `value` fields are mutually exclusive:
-
-**payload** - (optional) up to 7 bytes of data returned in the response,
-    represented as a hexadecimal number in a string. Many JSON parser cannot
-    handle 64-bit integers, which is why we are not using a numerical data type.
-
-**value** - (optional) if the response had a payload, this may be the
-    payload interpreted as an integer.
-
-The response to a simple PID request would look like this:
-
-    {"success": true, "bus": 1, "message_id": 1234, "mode": 1, "pid": 5, "payload": "0x2"}
-
-## Commands
-
-In addition to the `diagnostic_request` command described earlier, there are
-other possible values for the `command` field.
-
-All commands immediately return a `command_response`, e.g.:
-
-    { "command_response": "version", "message": "v6.0-dev (default)", "status": true}
-
-**command_response** - an echo of the command this is a ACKing.
-
-**status** - true if the command was understood and performed succesfully.
-
-**message** - (optional) a string message from the VI, e.g. to return a version
-    descriptor or error message.
-
-### Version Query
-
-The `version` command triggers the VI to inject a firmware version identifier
-response into the outgoing data stream.
-
-**Request**
-
-    { "command": "version"}
-
-**Response**
-
-    { "command_response": "version", "message": "v6.0-dev (default)", "status": true}
-
-### Device ID Query
-
-The `device_id` command triggers the VI to inject a unique device ID (e.g. the
-MAC address of an included Bluetooth module) into into the outgoing data stream.
-
-If no device ID is available, the response message will be "Unknown".
-
-**Request**
-
-    { "command": "device_id"}
-
-**Response**
-
-    { "command_response": "device_id", "message": "0012345678", "status": true}
-
-### Passthrough CAN Mode
-
-The `passthrough` command controls whether low-level CAN messages are passed
-through from the CAN bus through the VI to the output stream. If the CAN
-acceptance filter is in bypass mode and passthrough is enabled, the output
-stream will include all received CAN messages. If the bypass filter is enabled,
-only those CAN messages that have been pre-defined in the firmware are
-forwarded.
-
-**Request**
-
-    { "command": "passthrough",
-      "bus": 1,
-      "enabled": true
-    }
-
-**Response**
-
-If the bus in the request was valid and the passthrough mode was changed, the
-`status` field in the response will be `true`. If `false`, the passthrough mode
-was not changed.
-
-    { "command_response": "passthrough", "status": true}
-
-### Acceptance Filter Bypass
-
-The `af_bypass` command controls whether the CAN message acceptance filter is
-bypassed for each CAN controller. By default, hardware acceptance filter (AF) is
-enabled in the VI - only previously defined CAN message IDs will be received.
-Send this command with `bypass: true` to force the filters to bypassed.
-
-If `passthrough` mode is also enabled, when the AF is bypassed, the output will
-include all CAN messages received.
-
-**Request**
-
-    { "command": "af_bypass",
-      "bus": 1,
-      "bypass": true
-    }
-
-**Response**
-
-If the bus in the request was valid and the AF mode was changed, the `status`
-field in the response will be `true`. If `false`, the passthrough mode was not
-changed.
-
-    { "command_response": "af_bypass", "status": true}
-
-### Payload Format Control
-
-The `payload_format` command determines the format for output data from the VI
-and the expected format of commands sent to the VI.
-
-Valid formats are `json` and `protobuf`.
-
-**Request**
-
-    { "command": "payload_format",
-      "format": "json"
-    }
-
-**Response**
-
-If the format was changed successfully, the `status` in the response will be
-`true`. The response will be in the original message format, and all subsequent
-messages will be in the new format.
-
-    { "command_response": "payload_format", "status": true}
-
-### Automatic Pre-Defined OBD-II PID Requests
-
-The `predefined_obd2` command enables and disables the querying for and
-translating of a set of pre-defined OBD-II PIDs from the attached vehicle. When
-enabled, the VI will query the vehicle to see if these PIDs are claimed to be
-supported and for those that are, it will set up recurring requests. The
-responses will be output as simple vehicle messages, with the names defined in
-the "Signals Defined from Diagnostic Messages" section below.
-
-**Request**
-
-    { "command": "predefined_obd2",
-      "enabled": true
-    }
-
-**Response**
-
-If the predefined requests were enabled or disabled successfully, the `status` in
-the response will be `true`.
-
-    { "command_response": "predefined_obd2", "status": true}
-
-### C5 Cellular Configuration
-
-The ModemConfigurationCommand message allows users to change certain aspects of modem operation on-the-fly (at runtime). The modem configuration settings are stored in flash memory and are untouched by the bootloader during a software update (assuming the correct cellular_c5 linker file is used during compilation of vi-firmware). Thus, new modem settings persistent across power cycles.
-
-The ModemConfigurationCommand message provides three sub-messages for particular groups of modem settings. These are NetworkOperatorSettings, NetworkDataSettings, and ServerConnectSettings. These configuration messages are described in great detail within the [c5_cellular_config](https://github.com/openxc/vi-firmware/docs/advanced/c5_cell_config.html) documentation. 
-
-Currently, only the ServerConnectSettings sub-message is supported in the vi-firmware's command interpreter. All other settings are currently compile-time only.
-
-The ServerConnectSettings part of ModemConfigurationCommand allows the user to set the host server name and port that the device will use when opening a TCP socket to upload data. This destination must be running an HTTP server similar to [OpenXCWebServer](https://github.com/openxc/openxc-azure-webserver), which defines a set of supported HTTP transactions where the body is comprised of data in the familiar OpenXC Message Format.
-
-**Request**
-
-    { "command": "modem_configuration",
-      "server": {
-		"host": "www.myhost.com",
-		"port": 10000
-	  }
-    }
-
-**Response**
-
-	{ "command_response": "modem_configuration", "status": true}
-
-## C5 SD Card Status
-
-In order to check the status of the SD card, the following command is available:
-
-    { "command": "sd_mount_status"}
-    
-Command response if the SD card is mounted correctly:
-
-    { "command_response": "sd_mount_status", "status": true}
-    
-If the SD card is full, not enabled, or connected as a MSD, the device will respond with:
-
-    { "command_response": "sd_mount_status", "status": false}
-    
-For more info see [c5_msd](https://github.com/openxc/vi-firmware/docs/advanced/msd.html).
-
-## C5 RTC Configuration
-
-To set the current time of the RTC, the following
-
-    { "command": "rtc_configuration", "unix_time": "1448551563"}
-    
-The response is
-
-    { "command_response": "rtc_configuration", "status": true}
-
-For more info see [c5_rtc](https://github.com/openxc/vi-firmware/docs/advanced/rtc.html).
-
-## Extra Values
-
-Any of the following JSON objects may optionally include an `extras`
-field. The value may be any valid JSON object or array. The client libraries
-will do their best to parse this information into a generic format and pass it
-to your application. For example:
-
-    {"name": "steering_wheel_angle",
-        "value": 45,
-        "extras": {
-            "calibrated": false
-        }
-    }
-