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ThomasFarstrikeThomasFarstrike
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Update Fri3d 2026
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‎internal_filesystem/lib/mpos/board/fri3d_2026.py‎

Lines changed: 23 additions & 89 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,18 @@
1-
# Hardware initialization for Fri3d Camp 2024 Badge
1+
# Hardware initialization for Fri3d Camp 2026 Badge
2+
3+
# TODO:
4+
# - touch screen / touch pad
5+
# - IMU is different from fri3d_2024 (also address 0x6A instead of 0x6B)
6+
# - I2S audio (communicator) is the same
7+
# - headphone jack audio?
8+
# - headphone jack microphone?
9+
# - CH32X035GxUx over I2C:
10+
# - battery voltage measurement
11+
# - analog joystick
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# - digital buttons (X,Y,A,B, MENU)
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# - buzzer
14+
# - audio DAC emulation using buzzer might be slow or need specific buffered protocol
15+
216
from machine import Pin, SPI, SDCard
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import st7789
418
import lcd_bus
@@ -262,34 +276,16 @@ def keypad_read_cb(indev, data):
262276
indev.set_display(disp) # different from display
263277
indev.enable(True) # NOQA
264278

265-
# Battery voltage ADC measuring
266-
# NOTE: GPIO13 is on ADC2, which requires WiFi to be disabled during reading on ESP32-S3.
267-
# battery_voltage.py handles this automatically: disables WiFi, reads ADC, reconnects WiFi.
279+
# Battery voltage ADC measuring: sits on PC0 of CH32X035GxUx
268280
import mpos.battery_voltage
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"""
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best fit on battery power:
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2482 is 4.180
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2470 is 4.170
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2457 is 4.147
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# 2444 is 4.12
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2433 is 4.109
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2429 is 4.102
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2393 is 4.044
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2369 is 4.000
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2343 is 3.957
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2319 is 3.916
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2269 is 3.831
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2227 is 3.769
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"""
284281
def adc_to_voltage(adc_value):
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"""
286283
Convert raw ADC value to battery voltage using calibrated linear function.
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Calibration data shows linear relationship: voltage = -0.0016237 * adc + 8.2035
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This is ~10x more accurate than simple scaling (error ~0.01V vs ~0.1V).
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"""
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return (0.001651* adc_value + 0.08709)
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mpos.battery_voltage.init_adc(13, adc_to_voltage)
288+
#mpos.battery_voltage.init_adc(13, adc_to_voltage) # TODO
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294290
import mpos.sdcard
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mpos.sdcard.init(spi_bus, cs_pin=14)
@@ -298,8 +294,8 @@ def adc_to_voltage(adc_value):
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from machine import PWM, Pin
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from mpos import AudioFlinger
300296

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# Initialize buzzer (GPIO 46)
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buzzer = PWM(Pin(46), freq=550, duty=0)
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# Initialize buzzer: sits on PC14/CC1 of the CH32X035GxUx
298+
#buzzer = PWM(Pin(46), freq=550, duty=0)
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304300
# I2S pin configuration for audio output (DAC) and input (microphone)
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# Note: I2S is created per-stream, not at boot (only one instance can exist)
@@ -316,7 +312,7 @@ def adc_to_voltage(adc_value):
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}
317313

318314
# Initialize AudioFlinger with I2S and buzzer
319-
AudioFlinger(i2s_pins=i2s_pins, buzzer_instance=buzzer)
315+
#AudioFlinger(i2s_pins=i2s_pins, buzzer_instance=buzzer)
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# === LED HARDWARE ===
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import mpos.lights as LightsManager
@@ -327,71 +323,9 @@ def adc_to_voltage(adc_value):
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# === SENSOR HARDWARE ===
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import mpos.sensor_manager as SensorManager
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330-
# Create I2C bus for IMU (different pins from display)
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# Create I2C bus for IMU
331327
from machine import I2C
332328
imu_i2c = I2C(0, sda=Pin(9), scl=Pin(18))
333-
SensorManager.init(imu_i2c, address=0x6B, mounted_position=SensorManager.FACING_EARTH)
329+
SensorManager.init(imu_i2c, address=0x6A, mounted_position=SensorManager.FACING_EARTH)
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print("Fri3d hardware: Audio, LEDs, and sensors initialized")
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# === STARTUP "WOW" EFFECT ===
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import time
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import _thread
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341-
def startup_wow_effect():
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"""
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Epic startup effect with rainbow LED chase and upbeat startup jingle.
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Runs in background thread to avoid blocking boot.
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"""
346-
try:
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# Startup jingle: Happy upbeat sequence (ascending scale with flourish)
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startup_jingle = "Startup:d=8,o=6,b=200:c,d,e,g,4c7,4e,4c7"
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#startup_jingle = "ShortBeeps:d=32,o=5,b=320:c6,c7"
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351-
# Start the jingle
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AudioFlinger.play_rtttl(
353-
startup_jingle,
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stream_type=AudioFlinger.STREAM_NOTIFICATION,
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volume=60
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)
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358-
# Rainbow colors for the 5 LEDs
359-
rainbow = [
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(255, 0, 0), # Red
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(255, 128, 0), # Orange
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(255, 255, 0), # Yellow
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(0, 255, 0), # Green
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(0, 0, 255), # Blue
365-
]
366-
367-
# Rainbow sweep effect (3 passes, getting faster)
368-
for pass_num in range(3):
369-
for i in range(5):
370-
# Light up LEDs progressively
371-
for j in range(i + 1):
372-
LightsManager.set_led(j, *rainbow[j])
373-
LightsManager.write()
374-
time.sleep_ms(80 - pass_num * 20) # Speed up each pass
375-
376-
# Flash all LEDs bright white
377-
LightsManager.set_all(255, 255, 255)
378-
LightsManager.write()
379-
time.sleep_ms(150)
380-
381-
# Rainbow finale
382-
for i in range(5):
383-
LightsManager.set_led(i, *rainbow[i])
384-
LightsManager.write()
385-
time.sleep_ms(300)
386-
387-
# Fade out
388-
LightsManager.clear()
389-
LightsManager.write()
390-
391-
except Exception as e:
392-
print(f"Startup effect error: {e}")
393-
394-
_thread.stack_size(mpos.apps.good_stack_size()) # default stack size won't work, crashes!
395-
_thread.start_new_thread(startup_wow_effect, ())
396-
397-
print("fri3d_2024.py finished")
331+
print("fri3d_2026.py finished")

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