ca44aa833d
App.py-only (ships over the one-click updater). APP_VERSION -> 0.0.3. - Run/stop is now a background tint (gray running / near-black stopped) instead of STOP text, reclaiming the space. - Running time + bar counter show "of total" when the track has a b<n> length: "1:23 of 2:00" and "bar N of 16" (bar cycles 1..N); total time derived from bars x master-beats-per-bar x 60/bpm. Parser now reads the b<n> token. - Practice log is filtered to the current track (drops the redundant track column). - Pads: squares for the main pulse, circles for subdivisions (was square + hollow outline); fewer vectorio shapes too. - Track number set apart from the title (small + dim, right) so it no longer reads as part of the title. On-device editing (tap instrument -> lane table; tap beat -> cycle state; dirty-name -> confirm save/revert) is deferred to Phase 2, where "save" has a correct destination (an edited built-in saves as a user copy). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
735 lines
38 KiB
Python
735 lines
38 KiB
Python
# VARASYS PolyMeter - PM_K-1 "Kit" firmware (CircuitPython edition)
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# Raspberry Pi Pico (Pico / Pico W / Pico 2) on the 52Pi EP-0172 "Pico Breadboard Kit Plus":
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# 3.5" ST7796 320x480 cap-touch (GT911), PSP joystick, WS2812 RGB, buzzer, 2 buttons.
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#
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# WHY CIRCUITPYTHON: the board then mounts as a USB drive (CIRCUITPY) carrying this code, your
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# tracks (programs.json) and a copy of the editor - edit on the web, "Save to device" writes
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# programs.json here, and CircuitPython auto-reloads with the new grooves. It also sends USB-MIDI
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# (a note per click) so the web editor can play it out the computer's speakers ("Device audio").
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# Runs the SAME program strings as metronome.varasys.io.
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#
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# INSTALL: flash CircuitPython (https://circuitpython.org/board/raspberry_pi_pico/), then copy
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# this file as code.py plus programs.json onto the CIRCUITPY drive. It runs on boot.
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#
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# Fallback: the simpler MicroPython firmware (pico/main.py) is always available - BOOTSEL +
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# drag a MicroPython .uf2 to go back. The Pico cannot be bricked.
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#
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# Untested-panel notes & calibration flags are in CONFIG + pico-cp/README.md.
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import board, busio, digitalio, analogio, pwmio, displayio, vectorio, time, json, gc, os, supervisor
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supervisor.runtime.autoreload = False # we write our own files (log + pushed programs); never self-restart
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APP_VERSION = "0.0.3" # firmware version (the A/B updater pushes/compares this)
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try:
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import rtc # set from the editor's clock SysEx so the log has real timestamps
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except ImportError:
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rtc = None
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try: # CircuitPython 9.x
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from fourwire import FourWire
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from busdisplay import BusDisplay
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except ImportError: # CircuitPython 8.x
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from displayio import FourWire
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from displayio import Display as BusDisplay
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try:
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import neopixel_write # core module on RP2040 - drives WS2812 with no external library
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except ImportError:
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neopixel_write = None
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try:
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import usb_midi # default-enabled on RP2040 - sends a MIDI note per click to the computer
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except ImportError:
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usb_midi = None
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# ============================== CONFIG (tweak if needed) ==============================
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SPI_BAUD = 62_500_000 # faster SPI = smaller tearing window; drop to 40_000_000 if unstable
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LED_BRIGHTNESS = 0.15 # WS2812 sits right next to you - keep it dim (0..1)
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MIDI_ENABLED = True # send a USB-MIDI note per click (play via the web editor's "Device audio")
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MUTE_BUZZER = False # silence the on-board buzzer (e.g. when using computer audio)
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WIDTH, HEIGHT = 320, 480
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MADCTL = 0x48 # portrait; 0x48 swaps R/B for this BGR panel (cyan reads cyan). Use 0x40 if reversed.
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INVERT_COLORS = True # most ST7796 modules need inversion ON; set False if colours look negative
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# Touch (GT911) - flip if taps land wrong:
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TOUCH_SWAP_XY = False
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TOUCH_INVERT_X = False
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TOUCH_INVERT_Y = False
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TOUCH_DEBUG = False
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# Joystick:
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JOY_INVERT_X = False
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JOY_INVERT_Y = False
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JOY_DEADZONE = 9000
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# ----- pins (fixed by the EP-0172 board) -----
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P_SCK, P_MOSI, P_CS, P_DC, P_RST = board.GP2, board.GP3, board.GP5, board.GP6, board.GP7
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P_SDA, P_SCL = board.GP8, board.GP9
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P_RGB, P_BUZ, P_BTNA, P_BTNB = board.GP12, board.GP13, board.GP15, board.GP14
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P_JOYX, P_JOYY = board.GP26, board.GP27
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# ----- baked default grooves (used only if programs.json is missing/bad) -----
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DEFAULT_PROGRAMS = [
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("Four on the floor", "t120;kick:4;snare:4=.x.x;hatClosed:4/2"),
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("Swing ride", "t150;ride:4/2s;kick:4=X..x;snare:4=.x.x"),
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("7/8 (2+2+3)", "t130;kick:2+2+3=x..x..x;hatClosed:2+2+3/2"),
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("5 over 4", "t100;kick:4;claves:5~"),
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("Straight click", "t120;beep:4"),
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]
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# ============================== COLOURS (0xRRGGBB; displayio handles 565) ==============================
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C_BG, C_PANEL, C_TXT, C_MUTE = 0x06090E, 0x1C222C, 0xC7D0DB, 0x788494
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C_CYAN, C_AMBER, C_GREEN, C_DIM = 0x0AB3F7, 0xFF9B2E, 0x2FE07A, 0x243240
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C_BTN = 0x1C222C
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LEVEL_RGB = {2: (255, 110, 0), 1: (0, 150, 255), 3: (130, 70, 255)}
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# voice -> General-MIDI note (USB-MIDI bridge), and level -> MIDI velocity
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SOUND_GM = {"kick":36,"kick808":36,"kick909":36, "snare":38,"snare808":38,"snare909":38,
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"clap":39,"clap808":39,"clap909":39, "rim":37, "hatClosed":42,"hat808":42,"hat909":42,
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"hatOpen":46,"openHat808":46, "ride":51,"ride909":51, "crash":49,"crash909":49,
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"tomLow":41,"tom808":45,"tomMid":45,"tomHigh":48, "tambourine":54,
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"cowbell":56,"cowbell808":56, "woodblock":76,"jamblock":76, "claves":75, "beep":37}
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GM_DEFAULT = 37
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MIDI_VEL = {2: 120, 1: 90, 3: 45} # accent / normal / ghost
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MAXLANES = 5 # lanes shown on the pad grid (extras still play)
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GRID_TOP = 150 # top of the pad grid (leaves room for stopwatch/bar)
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LOG_TOP, LOG_ROWH, LOG_ROWS = 302, 16, 9 # practice-history log area (below the pad grid)
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MIN_LOG_SEC = 5 # don't log plays shorter than this
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PAD_DIM = (0x10161E, 0x0A3A52, 0x4A3010, 0x2A1D4A) # idle pad: mute / normal / accent / ghost
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PAD_LIT = (0x39414D, 0x0AB3F7, 0xFF9B2E, 0x967BFF) # playhead pad: mute / normal / accent / ghost
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C_GRID = 0x1A2330 # faint vertical beat gridlines (beats line up across lanes)
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C_RUNBG = 0x161D28 # background tint while running (vs near-black when stopped)
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# WS2812 RGB LED - self-contained via the core neopixel_write module (no external library)
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class RGB:
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def __init__(self, pin):
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self.ok = neopixel_write is not None
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if self.ok:
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self.io = digitalio.DigitalInOut(pin); self.io.direction = digitalio.Direction.OUTPUT
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self.buf = bytearray(3)
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def set(self, r, g, b):
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if not self.ok: return
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# WS2812 wants GRB order; scale down so it isn't blinding
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self.buf[0] = int(g * LED_BRIGHTNESS); self.buf[1] = int(r * LED_BRIGHTNESS); self.buf[2] = int(b * LED_BRIGHTNESS)
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try: neopixel_write.neopixel_write(self.io, self.buf)
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except Exception: self.ok = False
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# ============================== ANTI-ALIASED FONTS (binary blobs on the drive; see pico/gen_font.py) ==============================
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def load_font(path):
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with open(path, "rb") as f:
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blob = f.read()
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count = blob[0]; p = 1; pixoff = 1 + count * 7; glyphs = {}
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for _ in range(count):
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cp = (blob[p] << 8) | blob[p+1]; w = blob[p+2]; h = blob[p+3]
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xoff = blob[p+4]; xoff = xoff - 256 if xoff > 127 else xoff
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top = blob[p+5]; adv = blob[p+6]; p += 7
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glyphs[cp] = (w, h, xoff, top, adv, pixoff); pixoff += (w * h + 1) // 2
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return (glyphs, blob)
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FONT_S = load_font("/font_s.bin") # small - pad-grid lane labels
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FONT_M = load_font("/font_m.bin") # labels / buttons
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FONT_L = load_font("/font_l.bin") # big BPM
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gc.collect()
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def _blend(bg, fg, i):
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t = i * 17
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r = (((bg >> 16) & 0xFF)*(255-t) + ((fg >> 16) & 0xFF)*t) // 255
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g = (((bg >> 8) & 0xFF)*(255-t) + ((fg >> 8) & 0xFF)*t) // 255
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b = ((bg & 0xFF)*(255-t) + (fg & 0xFF)*t) // 255
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return (r << 16) | (g << 8) | b
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def make_text(s, font, fg, bg):
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"""Render a string into a displayio TileGrid (anti-aliased via a 16-step blend palette)."""
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glyphs, blob = font
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w = 0; top0 = 999; bot = 0
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for c in s:
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g = glyphs.get(ord(c))
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if not g: continue
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w += g[4]
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if g[1]:
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if g[3] < top0: top0 = g[3]
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if g[3] + g[1] > bot: bot = g[3] + g[1]
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if top0 == 999: top0 = 0
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w = max(1, w); h = max(1, bot - top0)
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gc.collect()
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bmp = displayio.Bitmap(w, h, 16)
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pal = displayio.Palette(16)
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for i in range(16): pal[i] = _blend(bg, fg, i)
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pen = 0
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for c in s:
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g = glyphs.get(ord(c))
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if not g: continue
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gw, gh, xoff, gtop, adv, off = g
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for j in range(gh):
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row = (gtop - top0) + j
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for i in range(gw):
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k = j * gw + i
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byte = blob[off + (k >> 1)]
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nib = (byte >> 4) if (k & 1) == 0 else (byte & 0xF)
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if nib:
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x = pen + xoff + i
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if 0 <= x < w and 0 <= row < h: bmp[x, row] = nib
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pen += adv
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return displayio.TileGrid(bmp, pixel_shader=pal), w, h
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# ---- single-image alpha assets (logo, status icons) — blit like a one-off glyph; see gen_assets.py ----
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def load_alpha(path):
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try:
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with open(path, "rb") as f: blob = f.read()
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return (blob[0], blob[1], blob) # (w, h, bytes); pixels start at offset 2
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except Exception:
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return None # missing/corrupt -> caller falls back to text (no crash)
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def make_glyph(asset, fg, bg):
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w, h, blob = asset
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gc.collect()
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bmp = displayio.Bitmap(w, h, 16); pal = displayio.Palette(16)
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for i in range(16): pal[i] = _blend(bg, fg, i)
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for k in range(w * h):
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byte = blob[2 + (k >> 1)]
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nib = (byte >> 4) if (k & 1) == 0 else (byte & 0xF)
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if nib: bmp[k % w, k // w] = nib
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return displayio.TileGrid(bmp, pixel_shader=pal), pal, w, h
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def _recolor(pal, fg, bg): # re-tint a stored asset palette in place (tear-free)
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for i in range(16): pal[i] = _blend(bg, fg, i)
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LOGO = load_alpha("/logo.bin") # VARASYS wordmark (no tagline)
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ICON_MIDI = load_alpha("/midi.bin") # DIN-5: green when a MIDI host is listening
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ICON_USB = load_alpha("/usb.bin") # trident: lit when USB-connected to a computer
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gc.collect()
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# ============================== POLYMETER ENGINE (same semantics as the web/MicroPython) ==============================
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PAT = {'X': 2, 'x': 1, 'g': 3, '.': 0, '-': 0, '_': 0}
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PRIO = {2: 3, 1: 2, 3: 1}
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def parse_program(s):
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bpm = 120; lanes = []; bars = 0
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for tok in s.strip().split(';'):
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tok = tok.strip()
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if not tok: continue
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if tok[0] == 't' and tok[1:].isdigit():
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bpm = int(tok[1:]); continue
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if tok[0] == 'b' and tok[1:].isdigit(): # b<n> = segment length in bars (totals + Continue)
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bars = int(tok[1:]); continue # (lane sounds like "beep:4" have a ':' -> not matched here)
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if ':' not in tok: continue
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lane = _parse_lane(tok)
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if lane: lanes.append(lane)
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if not lanes: lanes = [_parse_lane("beep:4")]
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return max(30, min(300, bpm)), lanes, bars
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def _parse_lane(tok):
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poly = '~' in tok; mute = '!' in tok
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tok = tok.replace('~', '').replace('!', '')
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if '@' in tok: tok = tok.split('@')[0]
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sound, _, rest = tok.partition(':')
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pattern = None
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if '=' in rest: rest, _, pattern = rest.partition('=')
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sub = 1; swing = False
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if '/' in rest:
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rest, _, sd = rest.partition('/')
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swing = sd.endswith('s'); sd = sd.rstrip('s') # "/2s" = swung eighths
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sub = int(sd) if sd.isdigit() else 1
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groups = [int(g) for g in rest.split('+') if g.isdigit()] or [4]
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beats = sum(groups); starts = set(); acc = 0
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for gp in groups: starts.add(acc); acc += gp
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steps = beats * sub
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if pattern:
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levels = [PAT.get(ch, 0) for ch in pattern]
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if len(levels) < steps: levels += [0] * (steps - len(levels))
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steps = len(levels)
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else:
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levels = []
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for i in range(steps):
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if i % sub == 0: levels.append(2 if (i // sub) in starts else 1)
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else: levels.append(0)
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return {'sound': sound, 'sub': sub, 'swing': swing, 'steps': steps, 'levels': levels, 'poly': poly, 'mute': mute}
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def load_programs():
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try:
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with open("/programs.json") as f:
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d = json.load(f)
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progs = [(p["name"], p["prog"]) for p in d["programs"]]
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if progs: return progs
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except Exception as e:
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print("programs.json:", e)
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return DEFAULT_PROGRAMS
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# ============================== GT911 TOUCH ==============================
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class GT911:
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def __init__(self, i2c):
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self.i2c = i2c; self.addr = None
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while not i2c.try_lock(): pass
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try: found = i2c.scan()
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finally: i2c.unlock()
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for a in (0x5D, 0x14):
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if a in found: self.addr = a; break
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if self.addr is None and found: self.addr = found[0]
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def _rd(self, reg, n):
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b = bytearray(n)
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while not self.i2c.try_lock(): pass
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try:
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self.i2c.writeto(self.addr, bytes([reg >> 8, reg & 0xFF]))
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self.i2c.readfrom_into(self.addr, b)
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finally: self.i2c.unlock()
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return b
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def _wr(self, reg, val):
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while not self.i2c.try_lock(): pass
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try: self.i2c.writeto(self.addr, bytes([reg >> 8, reg & 0xFF, val]))
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finally: self.i2c.unlock()
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def read(self):
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if self.addr is None: return None
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try: st = self._rd(0x814E, 1)[0]
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except OSError: return None
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if not (st & 0x80): return None
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n = st & 0x0F; pt = None
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if n >= 1:
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b = self._rd(0x8150, 4); tx = b[0] | (b[1] << 8); ty = b[2] | (b[3] << 8)
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pt = self._map(tx, ty)
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try: self._wr(0x814E, 0)
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except OSError: pass
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return pt
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def _map(self, tx, ty):
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if TOUCH_DEBUG: print("touch raw", tx, ty)
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if TOUCH_SWAP_XY: tx, ty = ty, tx
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if TOUCH_INVERT_X: tx = WIDTH - 1 - tx
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if TOUCH_INVERT_Y: ty = HEIGHT - 1 - ty
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if 0 <= tx < WIDTH and 0 <= ty < HEIGHT: return (tx, ty)
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return None
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# ============================== DISPLAY SETUP ==============================
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def st7796_init():
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inv = b'\x21\x00' if INVERT_COLORS else b'\x20\x00'
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return (
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b'\x01\x80\x78' # SWRESET + 120ms
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b'\x11\x80\x78' # SLPOUT + 120ms
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b'\xF0\x01\xC3' b'\xF0\x01\x96' # command-set unlock
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+ bytes([0x36, 0x01, MADCTL]) +
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b'\x3A\x01\x55' # 16bpp
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b'\xB4\x01\x01'
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b'\xB6\x03\x80\x02\x3B'
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b'\xE8\x08\x40\x8A\x00\x00\x29\x19\xA5\x33'
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b'\xC1\x01\x06' b'\xC2\x01\xA7'
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b'\xC5\x81\x18\x78' # VCOM + 120ms
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b'\xE0\x0E\xF0\x09\x0B\x06\x04\x15\x2F\x54\x42\x3C\x17\x14\x18\x1B'
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b'\xE1\x0E\xE0\x09\x0B\x06\x04\x03\x2B\x43\x42\x3B\x16\x14\x17\x1B'
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b'\xF0\x01\x3C' b'\xF0\x81\x69\x78' # lock + 120ms
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+ inv +
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b'\x29\x80\x32' # DISPON + 50ms
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)
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def make_display():
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displayio.release_displays()
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spi = busio.SPI(clock=P_SCK, MOSI=P_MOSI)
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bus = FourWire(spi, command=P_DC, chip_select=P_CS, reset=P_RST, baudrate=SPI_BAUD)
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return BusDisplay(bus, st7796_init(), width=WIDTH, height=HEIGHT, auto_refresh=False)
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def solid(color):
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p = displayio.Palette(1); p[0] = color; return p
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def rect(x, y, w, h, color):
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return vectorio.Rectangle(pixel_shader=solid(color), width=w, height=h, x=x, y=y)
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# ============================== APP ==============================
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class App:
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def __init__(self):
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self.display = make_display()
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self.i2c = busio.I2C(scl=P_SCL, sda=P_SDA, frequency=400_000)
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self.touch = GT911(self.i2c)
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self.midi = usb_midi.ports[1] if (MIDI_ENABLED and usb_midi and len(usb_midi.ports) > 1) else None
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self.midi_in = usb_midi.ports[0] if (MIDI_ENABLED and usb_midi and len(usb_midi.ports) > 0) else None
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self._mbuf = bytearray(64); self.midi_host = False; self.last_midi_in = 0.0
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self._sx = bytearray(); self._sxon = False # USB-MIDI SysEx assembler (clock + pushed programs)
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self.led = RGB(P_RGB)
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self.buz = pwmio.PWMOut(P_BUZ, frequency=1600, variable_frequency=True, duty_cycle=0)
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self.buz_off = 0
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self.btnA = self._btn(P_BTNA); self.btnB = self._btn(P_BTNB)
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self._aPrev = True; self._bPrev = True
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self.jx = analogio.AnalogIn(P_JOYX); self.jy = analogio.AnalogIn(P_JOYY)
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self._joyNext = 0
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self._touchDown = False; self._touchSeen = 0
|
|
self.running = False; self.bpm = 120; self.idx = 0; self.lanes = []; self.bars = 0; self.rgb = (0, 0, 0)
|
|
self.programs = load_programs()
|
|
self.dirty = True
|
|
self.pad_pal = displayio.Palette(8) # 0-3 idle levels (mute/normal/accent/ghost), 4-7 the lit playhead
|
|
for i in range(4): self.pad_pal[i] = PAD_DIM[i]; self.pad_pal[i + 4] = PAD_LIT[i]
|
|
self.lane_pads = []; self.lane_lit = []
|
|
self.usb_conn = False; self._m_steps = 0 # USB-connected state; master-lane steps (for the bar counter)
|
|
self._uiNext = 0.0; self._lastTs = None; self._lastBs = None # throttle the stopwatch/bar redraw
|
|
self.ic_midi_pal = None; self.ic_usb_pal = None; self.bg_pal = None
|
|
# practice history - persisted to /history.json (next to programs.json) when we own the filesystem
|
|
self.can_write = self._probe_write()
|
|
self.log = self._load_log()
|
|
self.play_start = None; self.play_bpm = 0; self.play_name = ""
|
|
self._armed = None; self.log_rows = []
|
|
self._build_scene()
|
|
self.load(0) # load() also draws the (track-filtered) practice log
|
|
self.draw_icons(); self.draw_meters()
|
|
|
|
def _btn(self, pin):
|
|
d = digitalio.DigitalInOut(pin); d.direction = digitalio.Direction.INPUT; d.pull = digitalio.Pull.UP
|
|
return d
|
|
|
|
# ---------- scene graph ----------
|
|
def _build_scene(self):
|
|
root = displayio.Group(); self.display.root_group = root
|
|
self.bg_pal = solid(C_BG) # recolored on play/stop (black <-> running gray)
|
|
root.append(vectorio.Rectangle(pixel_shader=self.bg_pal, width=WIDTH, height=HEIGHT, x=0, y=0))
|
|
# header: VARASYS logo (left, no tagline) + MIDI / USB status icons (right)
|
|
if LOGO:
|
|
tg, _p, lw, lh = make_glyph(LOGO, C_CYAN, C_BG); tg.x = 10; tg.y = 9; root.append(tg)
|
|
else:
|
|
tg, w, h = make_text("VARASYS", FONT_M, C_CYAN, C_BG); tg.x = 10; tg.y = 8; root.append(tg)
|
|
x = WIDTH - 12
|
|
for asset, attr in ((ICON_USB, "ic_usb_pal"), (ICON_MIDI, "ic_midi_pal")):
|
|
if asset:
|
|
tg, pal, w, h = make_glyph(asset, C_DIM, C_BG); x -= w; tg.x = x; tg.y = 8; x -= 8
|
|
root.append(tg); setattr(self, attr, pal)
|
|
root.append(rect(0, 38, WIDTH, 2, C_PANEL))
|
|
# dynamic groups
|
|
self.g_bpm = displayio.Group(); root.append(self.g_bpm) # big tempo (right)
|
|
self.g_time = displayio.Group(); root.append(self.g_time) # elapsed [of total] (left)
|
|
self.g_bar = displayio.Group(); root.append(self.g_bar) # bar [of total] (left)
|
|
self.g_name = displayio.Group(); root.append(self.g_name) # track title
|
|
self.g_idx = displayio.Group(); root.append(self.g_idx) # track number (dim, right) - set apart from the title
|
|
self.g_grid = displayio.Group(); root.append(self.g_grid) # lanes x step pads
|
|
root.append(rect(0, LOG_TOP - 6, WIDTH, 2, C_PANEL)) # divider above the history log
|
|
self.g_log = displayio.Group(); root.append(self.g_log) # practice history (tap a row to delete)
|
|
# run/stop is shown by the background tint (black=stopped, gray=running); transport = joystick + buttons A/B
|
|
|
|
def _place(self, group, s, x, y, fg, bg, font, right_edge=None):
|
|
while len(group): group.pop()
|
|
self.dirty = True
|
|
if not s: return
|
|
tg, w, h = make_text(s, font, fg, bg)
|
|
tg.x = (right_edge - w) if right_edge is not None else x; tg.y = y; group.append(tg)
|
|
def _center(self, group, s, cx, cy, fg, bg, font):
|
|
while len(group): group.pop()
|
|
tg, w, h = make_text(s, font, fg, bg); tg.x = cx - w//2; tg.y = cy - h//2; group.append(tg)
|
|
self.dirty = True
|
|
|
|
# ---------- program ----------
|
|
def load(self, i):
|
|
n = len(self.programs); self.idx = i % n
|
|
self.name, prog = self.programs[self.idx]
|
|
self.bpm, self.lanes, self.bars = parse_program(prog)
|
|
self.master = self.lanes[0]
|
|
self._reset_clock(); self.draw_bpm(); self.draw_status(); self.build_grid(); self.draw_log()
|
|
def _step_dur(self, L, step):
|
|
beat = 60_000_000_000 / self.bpm
|
|
if L['poly']: # ~ polymeter: fit this lane's whole cycle into lane 1's bar
|
|
m = self.lanes[0]; master_bar = beat * (m['steps'] // m['sub'])
|
|
return int(master_bar / L['steps'])
|
|
sub = L['sub']
|
|
if L['swing'] and sub % 2 == 0: # swing even subdivisions: long-short (2:1) pairs
|
|
pair = beat / (sub // 2)
|
|
return int(pair * 2 / 3) if (step % sub) % 2 == 0 else int(pair / 3)
|
|
return int(beat / sub) # straight: a step = one beat / subdivision
|
|
def _reset_clock(self):
|
|
now = time.monotonic_ns()
|
|
for L in self.lanes:
|
|
L['next'] = now; L['step'] = -1
|
|
self._m_steps = 0 # restart the bar count
|
|
|
|
# ---------- audio + light ----------
|
|
def click(self, level):
|
|
self.buz.frequency = {2: 2300, 1: 1600, 3: 1050}.get(level, 1600)
|
|
self.buz.duty_cycle = {2: 42000, 1: 30000, 3: 14000}.get(level, 30000)
|
|
self.buz_off = time.monotonic_ns() + 22_000_000
|
|
def flash(self, level):
|
|
self.rgb = LEVEL_RGB.get(level, (0, 150, 255))
|
|
self.led.set(*self.rgb)
|
|
def led_off(self):
|
|
self.rgb = (0, 0, 0)
|
|
self.led.set(0, 0, 0)
|
|
def midi_send(self, note, vel): # device-as-conductor: a note per click to the computer
|
|
if self.midi is None: return
|
|
try: self.midi.write(bytes([0x90, note, vel])) # Note On (percussive - no Note Off needed)
|
|
except Exception: pass
|
|
|
|
# ---------- transport ----------
|
|
def toggle(self):
|
|
self.running = not self.running
|
|
if self.running: self._reset_clock(); self._start_play()
|
|
else: self.buz.duty_cycle = 0; self.led_off(); self.reset_playheads(); self._log_play()
|
|
self.draw_runbg(); self.draw_meters()
|
|
def set_bpm(self, v):
|
|
v = max(30, min(300, v))
|
|
if v != self.bpm:
|
|
self.bpm = v
|
|
self.draw_bpm(); self.draw_meters() # total time depends on bpm
|
|
def goto(self, i):
|
|
was = self.running
|
|
if was: self.running = False; self._log_play() # close out the track that was playing
|
|
self.load(i)
|
|
if was: self.running = True; self._reset_clock(); self._start_play()
|
|
self.draw_runbg(); self.draw_meters()
|
|
def tap(self):
|
|
now = time.monotonic()
|
|
if not hasattr(self, '_taps'): self._taps = []
|
|
self._taps = [t for t in self._taps if now - t < 2.4]
|
|
self._taps.append(now)
|
|
if len(self._taps) >= 2:
|
|
span = (self._taps[-1] - self._taps[0]) / (len(self._taps) - 1)
|
|
if span > 0: self.set_bpm(round(60 / span))
|
|
|
|
# ---------- scheduler ----------
|
|
def tick(self):
|
|
now = time.monotonic_ns()
|
|
if self.buz_off and now >= self.buz_off: self.buz.duty_cycle = 0; self.buz_off = 0
|
|
if self.running:
|
|
fired = []
|
|
for li, L in enumerate(self.lanes):
|
|
adv = False
|
|
while now >= L['next']:
|
|
L['step'] = (L['step'] + 1) % L['steps']
|
|
if li == 0: self._m_steps += 1 # count master-lane steps -> bars
|
|
lvl = 0 if L['mute'] else L['levels'][L['step']]
|
|
if lvl > 0:
|
|
fired.append(lvl)
|
|
self.midi_send(SOUND_GM.get(L['sound'], GM_DEFAULT), MIDI_VEL.get(lvl, 90)) # one note per lane
|
|
L['next'] += self._step_dur(L, L['step']); adv = True
|
|
if adv and li < len(self.lane_pads): self._move_playhead(li, L['step'])
|
|
if fired:
|
|
best = max(fired, key=lambda l: PRIO.get(l, 0))
|
|
if not MUTE_BUZZER and not self.midi_host: self.click(best) # computer plays it instead
|
|
self.flash(best)
|
|
if self.rgb != (0, 0, 0):
|
|
r, g, b = self.rgb; r = r*7//10; g = g*7//10; b = b*7//10
|
|
self.rgb = (r, g, b) if (r+g+b) > 12 else (0, 0, 0)
|
|
self.led.set(*self.rgb)
|
|
|
|
# ---------- inputs ----------
|
|
def poll(self):
|
|
a = self.btnA.value
|
|
if (not a) and self._aPrev: self.toggle()
|
|
self._aPrev = a
|
|
b = self.btnB.value
|
|
if (not b) and self._bPrev: self.tap()
|
|
self._bPrev = b
|
|
now = time.monotonic_ns()
|
|
if now >= self._joyNext:
|
|
x = self.jx.value - 32768; y = self.jy.value - 32768
|
|
if JOY_INVERT_X: x = -x
|
|
if JOY_INVERT_Y: y = -y
|
|
if abs(y) > JOY_DEADZONE:
|
|
self.set_bpm(self.bpm + (1 if y > 0 else -1) * (5 if abs(y) > 26000 else 1))
|
|
self._joyNext = now + 70_000_000
|
|
elif abs(x) > JOY_DEADZONE:
|
|
self.goto(self.idx + (1 if x > 0 else -1)); self._joyNext = now + 350_000_000; return
|
|
else:
|
|
self._joyNext = now + 20_000_000
|
|
pt = self.touch.read()
|
|
nowms = time.monotonic()
|
|
if pt:
|
|
self._touchSeen = nowms
|
|
if not self._touchDown:
|
|
self._touchDown = True; self._tap_log(pt[0], pt[1])
|
|
elif self._touchDown and (nowms - self._touchSeen) > 0.14:
|
|
self._touchDown = False
|
|
# USB-MIDI in: any byte = a host is listening (heartbeat); also assemble SysEx (clock / pushed programs)
|
|
if self.midi_in is not None:
|
|
try: n = self.midi_in.readinto(self._mbuf)
|
|
except Exception: n = 0
|
|
if n:
|
|
self.last_midi_in = nowms
|
|
self._feed_midi(self._mbuf, n)
|
|
host = bool(self.last_midi_in) and (nowms - self.last_midi_in) < 1.0
|
|
if host != self.midi_host:
|
|
self.midi_host = host
|
|
if host: self.buz.duty_cycle = 0 # silence the buzzer when the computer takes over
|
|
self.led_off(); self.draw_icons()
|
|
uc = bool(getattr(supervisor.runtime, "usb_connected", True)) # connected to a computer?
|
|
if uc != self.usb_conn:
|
|
self.usb_conn = uc; self.draw_icons()
|
|
|
|
# ---------- drawing ----------
|
|
def draw_bpm(self):
|
|
self._place(self.g_bpm, str(self.bpm), 0, 44, C_TXT, C_BG, FONT_L, right_edge=WIDTH-12)
|
|
def draw_status(self): # title (bright) + track number set apart (dim, right)
|
|
self._place(self.g_name, self.name[:22], 12, 116, C_TXT, C_BG, FONT_M)
|
|
self._place(self.g_idx, "%d/%d" % (self.idx + 1, len(self.programs)), 0, 120,
|
|
C_DIM, C_BG, FONT_S, right_edge=WIDTH - 12)
|
|
def draw_runbg(self): # run/stop indicator: tint the whole background
|
|
if self.bg_pal is not None: self.bg_pal[0] = C_RUNBG if self.running else C_BG
|
|
self.dirty = True
|
|
def draw_icons(self): # recolor the MIDI/USB icons by state (tear-free palette swap)
|
|
if self.ic_midi_pal is not None:
|
|
_recolor(self.ic_midi_pal, C_GREEN if self.midi_host else C_DIM, C_BG)
|
|
if self.ic_usb_pal is not None:
|
|
_recolor(self.ic_usb_pal, C_CYAN if self.usb_conn else C_DIM, C_BG)
|
|
self.dirty = True
|
|
def _fmt_t(self, s): # m:ss, or h:mm:ss past an hour
|
|
s = int(s)
|
|
return "%d:%02d:%02d" % (s // 3600, (s % 3600) // 60, s % 60) if s >= 3600 else "%d:%02d" % (s // 60, s % 60)
|
|
def draw_meters(self): # running time [of total] + bar [of total]; ~4x/s from run()
|
|
run = self.running and self.play_start is not None
|
|
mlen = self.lanes[0]['steps'] if self.lanes else 1
|
|
bpb = (self.lanes[0]['steps'] // max(1, self.lanes[0]['sub'])) if self.lanes else 4
|
|
el = (time.monotonic() - self.play_start) if run else 0
|
|
mbars = self._m_steps // max(1, mlen) # whole master bars elapsed
|
|
cur = ("%d" % ((mbars % self.bars + 1) if self.bars else (mbars + 1))) if run else "-" # cycle 1..N
|
|
if self.bars: # track has a length (b<n>): show "X of TOTAL"
|
|
ts = "%s of %s" % (self._fmt_t(el), self._fmt_t(self.bars * bpb * 60.0 / self.bpm))
|
|
bs = "bar %s of %d" % (cur, self.bars)
|
|
else:
|
|
ts = self._fmt_t(el); bs = "bar %s" % cur
|
|
if ts != self._lastTs:
|
|
self._place(self.g_time, ts, 12, 52, C_TXT, C_BG, FONT_M); self._lastTs = ts
|
|
if bs != self._lastBs:
|
|
self._place(self.g_bar, bs, 12, 84, C_MUTE, C_BG, FONT_M); self._lastBs = bs
|
|
|
|
# ---------- pad grid (each lane = a row of step pads; playhead lit as it plays) ----------
|
|
def _padbase(self, L, s):
|
|
return 0 if L['mute'] else L['levels'][s]
|
|
def build_grid(self):
|
|
while len(self.g_grid): self.g_grid.pop()
|
|
self.lane_pads = []; self.lane_lit = []
|
|
n = min(len(self.lanes), MAXLANES)
|
|
top = GRID_TOP; rowh = min(40, ((LOG_TOP - 10) - top) // max(1, n))
|
|
px0 = 60; usable = WIDTH - 8 - px0 - 12; gridh = n * rowh
|
|
# vertical gridlines at the master lane's beats, full height -> beats line up across lanes
|
|
m = self.lanes[0]; mbeats = max(1, m['steps'] // max(1, m['sub']))
|
|
for bcol in range(mbeats):
|
|
self.g_grid.append(rect(px0 + 6 + (bcol * usable) // mbeats, top, 1, gridh, C_GRID))
|
|
for li in range(n):
|
|
L = self.lanes[li]; y = top + li * rowh; cy = y + rowh // 2
|
|
tg, w, h = make_text((L.get('sound', '') or '?')[:7], FONT_S, C_MUTE, C_BG)
|
|
tg.x = 8; tg.y = cy - h // 2; self.g_grid.append(tg)
|
|
steps = L['steps']; sub = L['sub']; stepw = max(1, usable // steps)
|
|
side = max(5, min(15, stepw - 1, rowh - 6)) # square edge for the main pulse
|
|
rad = max(2, min(side // 2, stepw // 2 - 1)) # smaller circle for subdivisions
|
|
pads = []
|
|
for s in range(steps):
|
|
cxp = px0 + 6 + (s * usable) // steps # proportional -> beats line up across lanes
|
|
if s % sub == 0: # main beat -> square
|
|
p = vectorio.Rectangle(pixel_shader=self.pad_pal, width=side, height=side,
|
|
x=cxp - side // 2, y=cy - side // 2)
|
|
else: # subdivision -> circle
|
|
p = vectorio.Circle(pixel_shader=self.pad_pal, radius=rad, x=cxp, y=cy)
|
|
p.color_index = self._padbase(L, s); self.g_grid.append(p); pads.append(p)
|
|
self.lane_pads.append(pads); self.lane_lit.append(-1)
|
|
self.dirty = True
|
|
def _move_playhead(self, li, step):
|
|
pads = self.lane_pads[li]; prev = self.lane_lit[li]
|
|
if 0 <= prev < len(pads): pads[prev].color_index = self._padbase(self.lanes[li], prev)
|
|
if step < len(pads): pads[step].color_index = self._padbase(self.lanes[li], step) + 4
|
|
self.lane_lit[li] = step; self.dirty = True
|
|
def reset_playheads(self):
|
|
for li, pads in enumerate(self.lane_pads):
|
|
prev = self.lane_lit[li]
|
|
if 0 <= prev < len(pads): pads[prev].color_index = self._padbase(self.lanes[li], prev)
|
|
self.lane_lit[li] = -1
|
|
self.dirty = True
|
|
|
|
# ---------- practice history (saved to /history.json, next to programs.json) ----------
|
|
def _probe_write(self):
|
|
try:
|
|
with open("/.wtest", "w") as f: f.write("1")
|
|
try: os.remove("/.wtest")
|
|
except Exception: pass
|
|
return True
|
|
except OSError:
|
|
return False # editor mode: the computer owns the FS
|
|
def _load_log(self):
|
|
try:
|
|
with open("/history.json") as f: return json.load(f).get("log", [])
|
|
except Exception:
|
|
return []
|
|
def _save_log(self):
|
|
if not self.can_write: return
|
|
try:
|
|
with open("/history.json", "w") as f: json.dump({"log": self.log[:200]}, f)
|
|
except OSError:
|
|
self.can_write = False
|
|
def _start_play(self):
|
|
self.play_start = time.monotonic(); self.play_bpm = self.bpm; self.play_name = self.name
|
|
def _log_play(self):
|
|
if self.play_start is None: return
|
|
dur = int(time.monotonic() - self.play_start); self.play_start = None
|
|
if dur < MIN_LOG_SEC: return # skip plays under 5 seconds
|
|
t = time.localtime()
|
|
self.log.insert(0, {"t": "%02d:%02d" % (t.tm_hour, t.tm_min), "bpm": self.play_bpm,
|
|
"dur": dur, "name": self.play_name})
|
|
del self.log[200:]; self._armed = None
|
|
self._save_log(); self.draw_log()
|
|
def draw_log(self):
|
|
g = self.g_log
|
|
while len(g): g.pop()
|
|
self.log_rows = []
|
|
hdr, w, h = make_text("PRACTICE LOG - THIS TRACK", FONT_S, C_MUTE, C_BG); hdr.x = 10; hdr.y = LOG_TOP; g.append(hdr)
|
|
rows = [(i, e) for i, e in enumerate(self.log) if e.get("name") == self.name] # current track only
|
|
if not rows:
|
|
tg, w, h = make_text("no plays over 5s yet", FONT_S, C_DIM, C_BG); tg.x = 10; tg.y = LOG_TOP + LOG_ROWH; g.append(tg)
|
|
self.dirty = True; return
|
|
y = LOG_TOP + LOG_ROWH + 2
|
|
for k in range(min(LOG_ROWS, len(rows))):
|
|
oi, e = rows[k]; armed = (oi == self._armed) # oi = index into self.log (for delete)
|
|
dur = "%d:%02d" % (e["dur"] // 60, e["dur"] % 60)
|
|
line = "%s%s %3d bpm %s" % ("x " if armed else "", e.get("t", "--:--"), e["bpm"], dur)
|
|
tg, w, h = make_text(line, FONT_S, C_AMBER if armed else C_TXT, C_BG); tg.x = 10; tg.y = y; g.append(tg)
|
|
self.log_rows.append((y - 2, y + LOG_ROWH - 2, oi))
|
|
y += LOG_ROWH
|
|
self.dirty = True
|
|
def _tap_log(self, x, ty):
|
|
for y0, y1, idx in self.log_rows:
|
|
if y0 <= ty <= y1:
|
|
if self._armed == idx: del self.log[idx]; self._armed = None; self._save_log(); self.draw_log() # confirm delete
|
|
else: self._armed = idx; self.draw_log() # arm (tap again)
|
|
return
|
|
if self._armed is not None: self._armed = None; self.draw_log() # tapped elsewhere -> cancel
|
|
|
|
# ---------- USB-MIDI in: SysEx assembler (clock + editor-pushed programs) ----------
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def _feed_midi(self, buf, n):
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for i in range(n):
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b = buf[i]
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if b == 0xF0: self._sx = bytearray(); self._sxon = True
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elif b == 0xF7:
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if self._sxon: self._handle_sysex(self._sx)
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self._sxon = False
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elif b >= 0xF8: pass # real-time (e.g. Active Sensing 0xFE) - ignore
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elif self._sxon:
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if len(self._sx) < 60000: self._sx.append(b) # big enough for a pushed firmware (app.py)
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else: self._sxon = False # overflow guard
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def _handle_sysex(self, sx):
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if len(sx) < 2 or sx[0] != 0x7D: return # 0x7D = our (educational) manufacturer id
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cmd = sx[1]
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if cmd == 0x01 and len(sx) >= 8 and rtc is not None: # set clock: yr-2000, mo, dd, hh, mm, ss
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try: rtc.RTC().datetime = time.struct_time((2000 + sx[2], sx[3], sx[4], sx[5], sx[6], sx[7], 0, -1, -1))
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except Exception: pass
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elif cmd == 0x02: # version query -> reply 0x03 + APP_VERSION
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if self.midi: self.midi.write(bytes([0xF0, 0x7D, 0x03]) + APP_VERSION.encode() + bytes([0xF7]))
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elif cmd == 0x10: # write /programs.json pushed from the editor, then reload
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try:
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with open("/programs.json", "wb") as f: f.write(bytes(sx[2:]))
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self.programs = load_programs(); self.idx = min(self.idx, len(self.programs) - 1)
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self.load(self.idx)
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if self.midi: self.midi.write(bytes([0xF0, 0x7D, 0x7F, 0xF7])) # ACK ok
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except OSError:
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if self.midi: self.midi.write(bytes([0xF0, 0x7D, 0x7E, 0xF7])) # NAK: read-only (editor mode)
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elif cmd == 0x20: # A/B firmware update: install new app.py to the trial slot
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try:
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data = bytes(sx[2:])
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try: os.remove("/app.bak")
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except OSError: pass
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os.rename("/app.py", "/app.bak") # keep the current build as the rollback
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with open("/app.py", "wb") as f: f.write(data)
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open("/trial", "w").close() # arm the trial; the loader reverts if it won't boot
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if self.midi: self.midi.write(bytes([0xF0, 0x7D, 0x7F, 0xF7])) # ACK -> rebooting
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time.sleep(0.3); supervisor.reload()
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except OSError:
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if self.midi: self.midi.write(bytes([0xF0, 0x7D, 0x7E, 0xF7])) # NAK: read-only (editor mode)
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def run(self):
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if self.touch.addr is None:
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print("GT911 touch not found")
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boot = time.monotonic()
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try: os.stat("/trial"); committed = False # we're a freshly-pushed build on trial
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except OSError: committed = True
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while True:
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self.tick(); self.poll()
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tnow = time.monotonic()
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if tnow >= self._uiNext: # ~4x/s: tick the stopwatch + bar counter
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self._uiNext = tnow + 0.25; self.draw_meters()
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if not committed and tnow - boot > 5: # booted & ran fine for 5s -> confirm the update
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try: os.remove("/trial")
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except Exception: pass
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committed = True
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# push a complete frame only when something changed (no mid-update tearing);
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# capped at the display's refresh rate, so dirty regions stay small and quick
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if self.dirty and self.display.refresh():
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self.dirty = False
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time.sleep(0.0005)
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App().run()
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