|
| 1 | +-------------------------------------------- |
| 2 | +-- main: Main tick function for racecapture device. |
| 3 | +-- |
| 4 | +-- Uncomment calls in onTick() to run scripts. |
| 5 | + |
| 6 | +LOG_LEVEL = 'info' |
| 7 | +TICKS = 50 |
| 8 | + |
| 9 | +function info(str) |
| 10 | + if LOG_LEVEL == 'info' or LOG_LEVEL == 'verbose' then print(str) end |
| 11 | +end |
| 12 | + |
| 13 | +function verbose(str) |
| 14 | + if LOG_LEVEL == 'verbose' then print(str) end |
| 15 | +end |
| 16 | + |
| 17 | +setTickRate(TICKS) |
| 18 | +function onTick() |
| 19 | + tick_frequency() |
| 20 | + -- tick_mock() |
| 21 | + tick_vminmax_simple() |
| 22 | + -- tick_brakebias() |
| 23 | +end |
| 24 | +-------------------------------------------- |
| 25 | +-- frequency: A script to help run actions less frequently than |
| 26 | +-- the global TICK frequency. |
| 27 | + |
| 28 | +-- current tick |
| 29 | +local tick = 0 |
| 30 | + |
| 31 | +-- returns true if this is the tick to run an action. |
| 32 | +-- E.g., pass in 10 to have an action trigger 10 times a second. |
| 33 | +function should_run(hz) |
| 34 | + return tick % (TICKS/hz) == 0 |
| 35 | +end |
| 36 | + |
| 37 | +function tick_frequency() |
| 38 | + tick = tick + 1 |
| 39 | +end |
| 40 | + |
| 41 | + |
| 42 | +-------------------------------------------- |
| 43 | +-- vminmax_simple: simple window based VMin and VMax signal. |
| 44 | + |
| 45 | +-- window size in seconds to keep track of first and last value. |
| 46 | +local WINDOW_SIZE_SEC = 5 |
| 47 | +-- how many per seconds to record |
| 48 | +local FREQUENCY = 10 |
| 49 | +-- minimum difference between edges and mid value to be considered a local value. |
| 50 | +local MIN_DELTA_MPH = 10 |
| 51 | + |
| 52 | +-- name, Hz, precision, min, max, units |
| 53 | +local minId = addChannel('VMin', 5, 0, 0, 200, 'mph') |
| 54 | +local maxId = addChannel('VMax', 5, 0, 0, 200, 'mph') |
| 55 | + |
| 56 | +-- recorded values |
| 57 | +local vs = {} |
| 58 | +-- we record a value every TICKS/FREQUENCY counts. |
| 59 | +local tick_count = 0 |
| 60 | + |
| 61 | +-- local min/max calculation. |
| 62 | +-- Returns signalId and value to update it to. |
| 63 | +function __vminmax_signal() |
| 64 | + verbose('\n'..table.concat(vs, ',')) |
| 65 | + first, mid, last = vs[1], vs[math.ceil(#vs/2)], vs[#vs] |
| 66 | + info('\nfirst='..first..', mid='..mid..', last='..last..' @'..tick) |
| 67 | + -- too flat? |
| 68 | + if math.abs(mid-first) < MIN_DELTA_MPH or math.abs(mid-last) < MIN_DELTA_MPH then |
| 69 | + verbose('\n too similar.') |
| 70 | + return 0, nil |
| 71 | + end |
| 72 | + -- maxima? |
| 73 | + if first < mid and last < mid then |
| 74 | + info('\n new max='..mid) |
| 75 | + return maxId, mid |
| 76 | + end |
| 77 | + -- minima? |
| 78 | + if first > mid and last > mid then |
| 79 | + info('\n new min='..mid) |
| 80 | + return minId, mid |
| 81 | + end |
| 82 | + verbose('\n no hill.') |
| 83 | + return 0, nil |
| 84 | +end |
| 85 | + |
| 86 | +function tick_vminmax_simple() |
| 87 | + local speed = getChannel('Speed') |
| 88 | + if speed ~= nil and should_run(FREQUENCY) then |
| 89 | + -- append, resize, update. |
| 90 | + table.insert(vs, speed) |
| 91 | + if #vs > WINDOW_SIZE_SEC*FREQUENCY then table.remove(vs, 1) end |
| 92 | + if #vs == WINDOW_SIZE_SEC*FREQUENCY then |
| 93 | + local id, value = __vminmax_signal() |
| 94 | + if id ~= 0 then |
| 95 | + setChannel(id, value) |
| 96 | + end |
| 97 | + end |
| 98 | + end |
| 99 | +end |
| 100 | + |
| 101 | +-------------------------------------------- |
| 102 | +-- brakebias: Adds BrakeBias signal. |
| 103 | +local bbid = addChannel('BrakeBias', 5, 1, 0, 100, '%') |
| 104 | + |
| 105 | +function tick_brakebias() |
| 106 | + local f = getChannel('BrakeF') |
| 107 | + local b = getChannel('BrakeR') |
| 108 | + -- only update when brake applied |
| 109 | + if b ~= 0 then setChannel(bbid, f/(f+b)*100) end |
| 110 | +end |
| 111 | + |
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