Dateien hochladen nach „scenarios/scripts“

scenarios/scripts/p300-tactile-accumulator.lua

+
+function arrayMax(a)
+    if #a == 0 then return nil, nil end
+    local maxIdx, maxValue = 0, a[0]
+    for i = 1, (#a -1 ) do
+        if maxValue < a[i] then
+            maxIdx, maxValue = i, a[i]
+        end
+    end
+    return maxIdx, maxValue
+end
+
+-- For handling target fifo
+
+List = {}
+function List.new ()
+	return {first = 0, last = -1}
+end
+
+function List.pushright (list, value)
+	local last = list.last + 1
+	list.last = last
+	list[last] = value
+end
+
+function List.popleft (list)
+	local first = list.first
+	if first > list.last then
+		error("list is empty") 
+	end
+	local value = list[first]
+	list[first] = nil        -- to allow garbage collection
+	list.first = first + 1
+	return value
+end
+
+function List.isempty (list)
+	if list.first > list.last  then
+		return true
+	else
+		return false
+	end
+end
+
+-- this function is called when the box is initialized
+function initialize(box)
+
+	dofile(box:get_config("${Path_Data}") .. "/plugins/stimulation/lua-stimulator-stim-codes.lua")
+
+	row_base = _G[box:get_setting(2)]
+	col_base = _G[box:get_setting(3)]
+	segment_start = _G[box:get_setting(4)]
+	segment_stop = _G[box:get_setting(5)]
+	
+	-- 0 inactive, 1 segment started, 2 segment stopped (can vote)
+	segment_status = 0
+
+	-- the idea is to push the flash states to the fifo, and when predictions arrive (with some delay), they are matched in oldest-first fashion.
+	target_fifo = List.new()
+	
+	-- box:log("Info", string.format("pop %d %d", id[1], id[2]))
+					
+	row_votes = {}
+	col_votes = {}
+	
+	do_debug = false
+	
+end
+
+-- this function is called when the box is uninitialized
+function uninitialize(box)
+       
+end
+		
+function process(box)
+	-- loops until box is stopped
+	while box:keep_processing() do
+		
+		-- first, parse the timeline stream
+		for stimulation = 1, box:get_stimulation_count(2) do
+			-- gets the received stimulation
+			local identifier, date, duration = box:get_stimulation(2, 1)
+			-- discards it
+			box:remove_stimulation(2, 1)			
+
+			if identifier == segment_start then
+				if do_debug then
+					box:log("Info", string.format("Trial start"))	
+					box:log("Info", string.format("Clear votes"))
+				end
+				-- zero the votes
+				col_votes = {}
+				row_votes = {}
+				target_fifo = List.new()
+				-- fixme fixed 20
+				for i = 0,20 do
+					col_votes[i] = 0
+					row_votes[i] = 0
+				end
+				segment_status = 1
+			end
+
+			-- Does the identifier code a flash? if so, put into fifo
+			if segment_status == 1 and identifier >= row_base and identifier <= OVTK_StimulationId_LabelEnd then
+			
+				-- assume rows before cols
+				if identifier < col_base then
+					local t = {"row", identifier - row_base}
+					List.pushright(target_fifo,t)
+					if do_debug then	
+						box:log("Info", string.format("Push row target %d", identifier - row_base ))		
+					end
+				else
+					local t = {"col", identifier - col_base}
+					List.pushright(target_fifo,t)	
+					if do_debug then	
+						box:log("Info", string.format("Push col target %d", identifier - col_base ))		
+					end
+				end
+				
+						
+			end
+
+			if identifier == segment_stop then
+				if do_debug then
+					box:log("Info", string.format("Trial stop"))
+				end
+				segment_status = 2
+			end
+
+		end
+		
+		-- then parse the classifications
+		for stimulation = 1, box:get_stimulation_count(1) do
+
+			-- gets the received stimulation
+			local identifier, date, duration = box:get_stimulation(1, 1)
+			-- discards it
+			box:remove_stimulation(1, 1)
+
+			-- Is it an in-class prediction?
+			if identifier == OVTK_StimulationId_Target then
+				local t = List.popleft(target_fifo)
+				if do_debug then
+					box:log("Info", string.format("Pred fifo %s %d is target", t[1], t[2]))
+				end
+				if t[1]=="row" then
+					row_votes[t[2]] = row_votes[t[2]] + 1
+				else
+					col_votes[t[2]] = col_votes[t[2]] + 1				
+				end
+			end
+			
+			if identifier == OVTK_StimulationId_NonTarget then
+				local t = List.popleft(target_fifo)
+				if do_debug then
+					box:log("Info", string.format("Pred fifo %s %d is nontarget", t[1], t[2]))			
+				end
+			end
+			
+		end
+		
+		if segment_status == 2 and List.isempty(target_fifo) then
+			-- output the vote after the segment end when we've matched all predictions
+			
+			local maxRowIdx, maxRowValue = arrayMax(row_votes)
+			local maxColIdx, maxColValue = arrayMax(col_votes)
+
+			if maxRowValue == 0 and maxColValue == 0 then
+				box:log("Warning", string.format("Classifier predicted 'no p300' for all flashes of the trial"));
+			end
+			
+			if do_debug then
+				local rowVotes = 0
+				local colVotes = 0
+				for ir, val in pairs(row_votes) do
+					rowVotes = rowVotes + val
+				end
+				for ir, val in pairs(col_votes) do
+					colVotes = colVotes + val
+				end
+			
+				box:log("Info", string.format("Vote [%d %d] wt [%d,%d]", maxRowIdx+row_base, maxColIdx+col_base, maxRowValue, maxColValue))	
+				box:log("Info", string.format("  Total [%d %d]", rowVotes, colVotes))
+			end
+			
+
+			
+			local now = box:get_current_time()
+			
+			box:send_stimulation(1, maxRowIdx + row_base, now, 0)
+			box:send_stimulation(2, maxColIdx + col_base, now, 0)
+					
+			segment_status = 0
+		end		
+
+		box:sleep()
+	end
+end
+

scenarios/scripts/p300-tactile-filter-flash.lua

+
+-- Picks out 'flashes' from a stimulation stream
+
+-- this function is called when the box is initialized
+function initialize(box)
+
+	dofile(box:get_config("${Path_Data}") .. "/plugins/stimulation/lua-stimulator-stim-codes.lua")
+	
+	box:set_filter_mode(1);
+	
+	state = 0
+	
+	do_debug = false
+end
+
+-- this function is called when the box is uninitialized
+function uninitialize(box)
+end
+
+-- this function is called once by the box
+function process(box)
+
+	-- loop until box:keep_processing() returns zero
+	-- cpu will be released with a call to sleep
+	-- at the end of the loop
+	while box:keep_processing() do
+
+		-- gets current simulated time
+		t = box:get_current_time()
+
+		-- loops on every received stimulation for a given input
+		for stimulation = 1, box:get_stimulation_count(1) do
+
+			-- gets stimulation
+			stimulation_id, stimulation_time, stimulation_duration = box:get_stimulation(1, 1)
+
+			if stimulation_id == OVTK_StimulationId_SegmentStart then
+				state = 1
+			elseif stimulation_id == OVTK_StimulationId_SegmentStop then
+				state = 0
+			end
+
+			-- If we're between 'rest start' and 'rest_stop', this specifies a target
+			if state == 1 and stimulation_id >= OVTK_StimulationId_LabelStart and stimulation_id <= OVTK_StimulationId_LabelEnd then
+			
+				box:send_stimulation(1, stimulation_id, stimulation_time, 0)
+
+				if do_debug then	
+					box:log("Info", string.format("Push a target %d at %f (now %f)", stimulation_id, stimulation_time, t))		
+				end						
+			end
+			
+			-- discards it
+			box:remove_stimulation(1, 1)
+
+		end
+
+		-- releases cpu
+		box:sleep()
+	end
+end

scenarios/scripts/p300-tactile-filter-target.lua

+
+-- Picks out 'targets' from a stimulation stream
+
+-- this function is called when the box is initialized
+function initialize(box)
+
+	dofile(box:get_config("${Path_Data}") .. "/plugins/stimulation/lua-stimulator-stim-codes.lua")
+	
+	state = 0
+	
+	box:set_filter_mode(1);
+	
+	do_debug = false
+end
+
+-- this function is called when the box is uninitialized
+function uninitialize(box)
+end
+
+-- this function is called once by the box
+function process(box)
+
+	-- loop until box:keep_processing() returns zero
+	-- cpu will be released with a call to sleep
+	-- at the end of the loop
+	while box:keep_processing() do
+
+		-- gets current simulated time
+		t = box:get_current_time()
+
+		-- loops on every received stimulation for a given input
+		for stimulation = 1, box:get_stimulation_count(1) do
+
+			-- gets stimulation
+			stimulation_id, stimulation_time, stimulation_duration = box:get_stimulation(1, 1)
+
+			if stimulation_id == OVTK_StimulationId_RestStart then
+				state = 1
+			elseif stimulation_id == OVTK_StimulationId_RestStop then
+				state = 0
+			end
+
+			-- If we're between 'rest start' and 'rest_stop', this specifies a target
+			if state == 1 and stimulation_id >= OVTK_StimulationId_LabelStart and stimulation_id <= OVTK_StimulationId_LabelEnd then
+				
+				box:send_stimulation(1, stimulation_id, stimulation_time, 0)				
+
+				if do_debug then	
+					box:log("Info", string.format("Push a target %d at %f (now = %f)", stimulation_id, stimulation_time, t))		
+				end						
+			end
+			
+			-- discards it
+			box:remove_stimulation(1, 1)
+
+		end
+
+		-- releases cpu
+		box:sleep()
+	end
+end

scenarios/scripts/p300-tactile-launch.lua

+
+-- this function is called when the box is initialized
+function initialize(box)
+
+	dofile(box:get_config("${Path_Data}") .. "/plugins/stimulation/lua-stimulator-stim-codes.lua")
+
+	stim = _G[box:get_setting(2)]
+	launchTime = box:get_setting(3)
+	
+end
+
+-- this function is called when the box is uninitialized
+function uninitialize(box)
+end
+
+-- this function is called once by the box
+function process(box)
+
+	box:send_stimulation(1, stim, launchTime, 0)
+
+end

scenarios/scripts/p300-tactile-stimulator.lua

+-- This Lua script sends Stimulations to the speller visualization box for a tactile p300-System with 6 stimulators
+--
+-- Author : Tobias Baumann
+-- Date   : 2021-12-06
+-- Revised: 2021-19-11
+
+--This function lets the box sleep until a fixed moment
+function wait_until(box, time)
+	while box:get_current_time() < time do
+		box:sleep()
+	end
+end
+
+--This function lets the box wait for a fixed duration
+function wait_for(box, duration)
+	wait_until(box, box:get_current_time() + duration)
+end
+
+--this function checks, wether value already is an element of the given stim_matrix
+function is_element(matrix, value)
+	for i = 1, #matrix do
+		if #matrix == 0 then
+			return(false)
+		elseif value == matrix[i] then
+			return(true)
+		end
+	end
+	return(false)
+end
+--this function creates a sequence of stimulations by shuffeling the values of the given stim_matrix
+function create_sequence(matrix)
+	math.randomseed(os.time())
+	local stim_matrix = {}
+	local stim_code = 0
+	local i = 1
+	while i <= #matrix do
+		stim_code = matrix[math.random(1,#matrix)]	
+		if is_element(stim_matrix, stim_code) == false then
+			stim_matrix[i] = stim_code
+			i = i + 1
+		end
+	end
+	return(stim_matrix)
+end
+
+-- this function is called when the box is initialized
+function initialize(box)
+	--load stimulation codes
+	dofile(box:get_config("${Path_Data}") .. "/plugins/stimulation/lua-stimulator-stim-codes.lua")
+	
+	--load box settings
+	row_base = _G[box:get_setting(2)]
+	col_base = _G[box:get_setting(3)] 
+	n_rows = box:get_setting(4)
+	n_repetitions = box:get_setting(5)
+	flash_duration = box:get_setting(7)
+	noflash_duration = box:get_setting(8)
+	inter_repetition_delay = box:get_setting(9)
+	inter_trial_delay = box:get_setting(10)
+	send_toggle = _G[box:get_setting(11)]
+	time_to_send = box:get_setting(13)
+	
+	if box:get_setting(12) == 'true' then
+		free_spelling = true
+		n_trials = 1
+	else
+		free_spelling = false
+		n_trials = box:get_setting(6)
+	end
+	
+	--Lua variables
+	send = false
+	experiment_end = false
+	tactilo_stimcodes = {}
+	for x = 1, n_rows do
+		tactilo_stimcodes[x] = row_base + x - 1
+	end
+end
+
+-- this function is called when the box is uninitialized
+function uninitialize(box)
+
+end
+
+-- this function is called once by the box
+function process(box)
+	while box:keep_processing() do
+	
+		if send and not experiment_end then
+			-- iterate over the number of trials
+			for trial = 1, n_trials do
+				box:send_stimulation(1, OVTK_StimulationId_RestStart, box:get_current_time() , 0)
+				wait_for(box, inter_trial_delay)
+				box:send_stimulation(1, OVTK_StimulationId_RestStop, box:get_current_time() , 0)
+				box:send_stimulation(1, OVTK_StimulationId_TrialStart ,box:get_current_time() , 0)
+				
+				-- iterate over the number of repetitions
+				for segment = 1, n_repetitions do
+					tactilo_stimcodes = create_sequence(tactilo_stimcodes)
+					box:send_stimulation(1, OVTK_StimulationId_SegmentStart ,box:get_current_time() , 0)
+					
+					-- iterate over the number of tactilos
+					for i = 1, #tactilo_stimcodes do
+						box:send_stimulation(1, tactilo_stimcodes[i] ,box:get_current_time() , 0)
+						box:send_stimulation(1, OVTK_StimulationId_VisualStimulationStart ,box:get_current_time() , 0)
+						wait_for(box, flash_duration)
+						box:send_stimulation(1, OVTK_StimulationId_VisualStimulationStop ,box:get_current_time() , 0)
+						wait_for(box, noflash_duration)
+					end
+					
+					box:send_stimulation(1, OVTK_StimulationId_SegmentStop ,box:get_current_time() , 0)
+					wait_for(box, inter_repetition_delay)
+				end
+				
+				box:send_stimulation(1, OVTK_StimulationId_TrialStop ,box:get_current_time() , 0)
+			
+			end
+			
+			if not free_spelling then
+				-- end experiment if set to copy spelling
+				box:send_stimulation(1, OVTK_StimulationId_ExperimentStop ,box:get_current_time() , 0)
+				send = false
+				experiment_end = true
+			end
+			
+		else if not send and not experiment_end then
+			-- delay the start of the experiment by t = time_to_send
+			wait_for(box, time_to_send)
+			send = true
+			box:send_stimulation(1, OVTK_StimulationId_ExperimentStart ,box:get_current_time() , 0)
+		end
+		
+		end
+		-- releases cpu
+		box:sleep()
+	end
+	
+end