README.md

Please note: This project is not yet operational !!!!!!!!

EcuDiagSimLuaDynamization

Project Overview

This project is in its early stages, focusing on adjusting LUA scripts for the EcuDiagSim project, specifically to enable dynamic interaction with Data Identifiers (DIDs) for both reading and writing. This means that after the LUA rework, you could modify DIDs with a diagnostic tester as if interacting with a real ECU.

Current State

Exploration of the Loretta library for LUA code manipulation is ongoing, i believe it is the right tool for my goals. I've never worked with syntax parsing before and find it quite challenging, so any help is welcome.

Lua Code Transformation Example

Before:

YourEcuName = {
	RequestId = 0x7A6,
	ResponseId = 0x7A7,
	Raw = {
		["10 03"] = "50 03 00 28 00 C8",
		["3E 00"] = "7E 00",
		["22 22 35"] = "62 22 35 47 11",
		["2E 22 35 47 11"] = "6E 22 35",
        -- Additional entries here
    }
}

After:

YourEcuName = {
	RequestId = 0x7A6,
	ResponseId = 0x7A7,
	DIDs = {
		["22 35"] = "47 11",
	},
	Raw = {
		["10 03"] = "50 03 00 28 00 C8",
		["3E 00"] = "7E 00",
		["22 22 35"] =  function(request) return getDidData(YourEcuName,request) end,
		["2E 22 35 *"] = function(request) return updateDidData(YourEcuName,request ) end,
        -- Additional entries here
    }
}

-- Function to update DIDs
function updateDidData(ecu, request)
    local key = request:sub(4,8)  -- Extract the DID key from the request
    local value = request:sub(10)  -- Extract the value to be assigned to the DID key
    ecu.DIDs[key] = value  -- Update the value in the DIDs container
    return "6E " .. key  -- Return Response
end

-- Function to retrieve a value from DIDs
function getDidData(ecu, request)
    local key = request:sub(4)  -- Extract the key from the request starting from the 4th character
    local value = ecu.DIDs[key]  -- Retrieve the value associated with the key in the DIDs table
    if value then
        return "62 " .. key .. " " .. value  -- Return the Response with the retrieved value
    else
        return "7F 22 11"  -- Return a default error message if the key is not found
    end
end