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„scenarios/scripts/p300-tactile-stimulator.lua“ ändern

master
Tobias Baumann 1 year ago
parent
f198fd7a69
commit
d1b78e738e
1 changed files with 138 additions and 129 deletions
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  1. 138
    129
      scenarios/scripts/p300-tactile-stimulator.lua

+ 138
- 129
scenarios/scripts/p300-tactile-stimulator.lua View File

@@ -1,136 +1,138 @@
--
--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
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)]
n_tactilos = box:get_setting(3)
n_repetitions = box:get_setting(4)
n_trials = box:get_setting(5)
flash_duration = box:get_setting(6)
noflash_duration = box:get_setting(7)
inter_repetition_delay = box:get_setting(8)
inter_trial_delay = box:get_setting(9)
send_toggle = _G[box:get_setting(10)]
free_spelling = box:get_setting(11)
time_to_send = box:get_setting(12)
--Set number of trials to 1 in free spelling mode
if free_spelling == 'true' then
n_trials = 1
end
--Lua variables
send = false
experiment_end = false
tactilo_stimcodes = {}
for x = 1, n_tactilos do
tactilo_stimcodes[x] = row_base + x - 1
end
end
function uninitialize(box)
end
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 free_spelling == 'false' 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
-- 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)
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)
--randomseed
math.randomseed(os.time())
--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)]
n_tactilos = box:get_setting(3)
n_repetitions = box:get_setting(4)
n_trials = box:get_setting(5)
flash_duration = box:get_setting(6)
noflash_duration = box:get_setting(7)
inter_repetition_delay = box:get_setting(8)
inter_trial_delay = box:get_setting(9)
send_toggle = _G[box:get_setting(10)]
free_spelling = box:get_setting(11)
time_to_send = box:get_setting(12)
--Set number of trials to 1 in free spelling mode
if free_spelling == 'true' then
n_trials = 1
end
--Lua variables
send = false
experiment_end = false
tactilo_stimcodes = {}
for x = 1, n_tactilos 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 free_spelling == 'false' 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

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