# EMF Camp Tilda Mk 3 Metronome # Copy file to board from Windows Command line: # e.g. >copy main.py e:\main.py /Y # To run without reboot connect to com port of card at 115200 BAUD # and run command: # exec(open("main.py").read()) # Keys: # - A/B : Move up and down through the number of steps in the bar and the strong/weak steps pattern # - Menu: Change the number of steps in each beat (shown by the grey lines) # - Joy Centre: Start/stop # - Joy up/down: change BPM # - Joy left: change light flash on start of bar/strong beats # - Joy right: step forward one step import ugfx import buttons import pyb from pyb import UART #modeNames = ["2","3","4","4 (2+2)","6","6 (3+3)", "6 (2+2+2)","8","8 (4+4)"] bpmNames = [ [0, "Larghissimo"], [25,"Grave"], [41,"Largo"], [61,"Larghetto"], [67,"Adagio"], [73,"Adagietto"], [77,"Andante"], [81,"Andantino"], [93,"Andante moderato"], [109,"Moderato"], [113,"Allegretto"], [121,"Allegro"], [169,"Vivace"], [173,"Vivacissimo"], [177,"Presto"], [200,"Prestissimo"], [1000,"Blah"] ] modeLens = [ 2, 3, 4, 4, 6, 6, 6, 8, 8, 8] # Number of steps modeMods = [ 2, 3, 4, 2, 6, 3, 2, 8, 4, 2] # Where the strong beats fall modeClks = [24,24,24,24,24,24,24,12,12, 12] # Number of midi clocks per step bpmLens = [[],[1,2],[1,3],[1,2,4],[],[1,2,3,6],[],[1,2,4,8]] # Allowed values of steps per beat bpms = list(range(20,40))+[40,42,44,46,48,50,52,54,56,58,60,63,66,69,72,76,80,84,88,92,96,100,104,108,112,116,120,126,132,138,144,152,160,168,176,184,192,200,208] numModes = len(modeLens) numBpms = len(bpms) def resetSleep(): global sleepStart sleepStart = pyb.millis() ugfx.backlight(100) def getBpmName(bpm): for i in range(1,len(bpmNames)): if bpm < bpmNames[i][0]: return bpmNames[i-1][1] def showBpm(): ugfx.area(0,0,276,45,ugfx.BLACK) ugfx.set_default_font(ugfx.FONT_TITLE) ugfx.text(0,10,str(bpms[bpmp]) +" "+getBpmName(bpms[bpmp]) ,ugfx.WHITE) def showPlay(): ugfx.area(276,0,44,45,ugfx.BLACK) if playOn: ugfx.fill_circle(298,22,15, ugfx.GREEN) else: ugfx.circle(298,22,15, ugfx.RED) def getCol(n): if (n%modeMods[metMode])==0: return ugfx.WHITE else: return ugfx.RED def fillRect(i,c): ugfx.area(40*i+3,101,34,98,c) def showG(): ugfx.area(0,46,320,240-45,ugfx.BLACK) for i in range(modeLens[metMode]): ugfx.box(40*i+2,100,36,100,getCol(i)) fillRect(pos,getCol(pos)) for i in range(modeLens[metMode]/stepsPerBpmUnit): ugfx.area(40*i*stepsPerBpmUnit+6,206,stepsPerBpmUnit*40-12, 4, ugfx.WHITE) def updateMode(c): global metMode, pos, stepsPerBpmUnit oldLen = modeLens[metMode] metMode = metMode + c if metMode < 0: metMode = 0 if metMode >= numModes: metMode = numModes-1 pos = modeLens[metMode]-1 if (oldLen != modeLens[metMode]): stepsPerBpmUnit = 1 showBpm() showG() def playBeat(b): uart.writechar(0x99) if b == 0 : uart.writechar(0x24) elif (b % modeMods[metMode]) == 0: uart.writechar(0x26) else: uart.writechar(0x2a) uart.writechar(0x7f) beatStart = pyb.millis() for i in range(modeClks[metMode]): uart.writechar(0xf8) def nextBeat(): global beatStart, pos, ledStart beatStart = pyb.millis() fillRect(pos,ugfx.BLACK) pos = (pos + 1) % modeLens[metMode] playBeat(pos) if flashMode > 0: if pos == 0: ledStart = pyb.millis() pyb.LED(1).on() pyb.LED(2).on() elif flashMode == 2 and (pos % modeMods[metMode]) == 0: ledStart = pyb.millis() pyb.LED(1).on() fillRect(pos,getCol(pos)) def nextBpmStep(): global stepsPerBpmUnit s = bpmLens[modeLens[metMode]-1] # Find the list of possible stepsperBPM p = s.index(stepsPerBpmUnit) p = p+1 if p == len(s): p = 0 stepsPerBpmUnit = s[p] showG() metMode=2 bpmp=int(numBpms/2)+1 pos = modeLens[metMode]-1 zeroInterval = 50 firstInterval = 400 secondInterval = 60 sleepInterval = 1000*60*30 # 30 minutes preSleepInterval = int(sleepInterval*3/4) pedalInterval = 50 pedalBounceFlag = False pedalGoneUp = True upStart = pyb.millis() downStart = pyb.millis() upInterval = zeroInterval upCount = 0 downInterval = zeroInterval downCount = 0 beatStart = pyb.millis() playOn = False ledStart = pyb.millis() flashMode = 0 pedalStart = pyb.millis() stepsPerBpmUnit = 1 ugfx.init() buttons.init() pedalPin = pyb.Pin("X1", pyb.Pin.IN, pyb.Pin.PULL_UP) ugfx.clear(ugfx.WHITE) resetSleep() showBpm() showPlay() showG() uart = UART(3, 31250) uart.init(31250, bits=8, parity=None, stop=1) while True: if buttons.is_triggered("BTN_B"): updateMode(+1) resetSleep() if buttons.is_triggered("BTN_A"): updateMode(-1) resetSleep() if buttons.is_triggered("JOY_RIGHT") : nextBeat() resetSleep() if pedalGoneUp and pedalPin.value() == 0: pedalGoneUp = False pedalBounceFlag = False nextBeat() resetSleep() if not pedalGoneUp: if not pedalBounceFlag: if pedalPin.value() == 1: # Gone up pedalBounceFlag = True pedalStart = pyb.millis() else: # Started debounce if pedalPin.value() == 1: # Still up if pyb.elapsed_millis(pedalStart) > pedalInterval: pedalGoneUp = True else: # bouncing pedalBounceFlag = False if buttons.is_triggered("BTN_MENU") : nextBpmStep() resetSleep() if pyb.elapsed_millis(beatStart)>=(60000/bpms[bpmp])/stepsPerBpmUnit and playOn: nextBeat() resetSleep() if buttons.is_triggered("JOY_CENTER"): playOn = not playOn showPlay() resetSleep() if pyb.elapsed_millis(ledStart)>100: pyb.LED(1).off() pyb.LED(2).off() if buttons.is_triggered("JOY_LEFT"): flashMode = (flashMode + 1) % 3 if flashMode == 1: ledStart = pyb.millis() pyb.LED(2).on() if flashMode == 2: ledStart = pyb.millis() pyb.LED(1).on() resetSleep() if buttons.is_pressed("JOY_UP"): resetSleep() if pyb.elapsed_millis(upStart) > upInterval: if bpmp < numBpms-1: bpmp=bpmp+1 showBpm() upStart = pyb.millis() upCount = upCount + 1 if upCount <2: upInterval = firstInterval else: upInterval = secondInterval else: upInterval = zeroInterval upCount = 0 if buttons.is_pressed("JOY_DOWN"): resetSleep() if pyb.elapsed_millis(downStart) > downInterval: if bpmp > 0: bpmp = bpmp - 1 showBpm() downStart = pyb.millis() downCount = downCount + 1 if downCount <2: downInterval = firstInterval else: downInterval = secondInterval else: downInterval = zeroInterval downCount = 0 if buttons.is_pressed("BTN_A") and buttons.is_pressed("BTN_B"): ugfx.backlight(0) if pyb.elapsed_millis(sleepStart) > sleepInterval: ugfx.backlight(0) elif pyb.elapsed_millis(sleepStart) > preSleepInterval: ugfx.backlight(20)