TTs whisper

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2026-06-18 13:45:32 +02:00
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"""
gesture.py — Lectura del sensor de gestos PAJ7620U2 via I2C raw (smbus2).
Equivalent a gesture.cpp del codi Arduino/ESP32.
No hi ha pin INT disponible al PCB → polling cada 50ms en un thread.
Bus I2C 3 (GPIO2=SDA, GPIO1=SCL, compartit amb VL53L0X i ADS1115).
Llibreria C++ equivalent: RevEng_PAJ7620 (Aaron S. Crandall)
"""
import time
import threading
import smbus2
# ==================
# IDs de gest
# ==================
GS_NONE = 0
GS_FORWARD = 1
GS_LEFT = 2
GS_RIGHT = 3
GS_UP = 4
GS_DOWN = 5
GS_CLOCKWISE = 6
GS_ANTICLOCKWISE = 7
GS_WAVE = 8
# Àlies per al quibot.py
GS_CW = GS_CLOCKWISE
GS_CCW = GS_ANTICLOCKWISE
# ==================
# Registres PAJ7620U2
# ==================
_PAJ7620_ADDR = 0x73
_REG_BANK_SEL = 0xEF # Registre de selecció de banc (0x00=banc0, 0x01=banc1)
_REG_PART_ID_LSB = 0x00 # Ha de retornar 0x20
_REG_PART_ID_MSB = 0x01 # Ha de retornar 0x76
_REG_GESTURE_0 = 0x43 # Bits 07: Right, Left, Up, Down, Forward, Backward, CW, CCW
_REG_GESTURE_1 = 0x44 # Bit 0: Wave
# Bits de gest al registre 0x43
_BIT_RIGHT = 0x01
_BIT_LEFT = 0x02
_BIT_UP = 0x04
_BIT_DOWN = 0x08
_BIT_FORWARD = 0x10
_BIT_BACKWARD = 0x20
_BIT_CW = 0x40
_BIT_CCW = 0x80
# Bit de gest al registre 0x44
_BIT_WAVE = 0x01
# ==================
# Seqüències d'inicialització
# ==================
_INIT_BANK0 = [
(0x32, 0x29), (0x33, 0x01), (0x34, 0x00), (0x35, 0x01), (0x36, 0x00),
(0x37, 0x07), (0x38, 0x17), (0x39, 0x06), (0x3A, 0x12), (0x3F, 0x00),
(0x40, 0x02), (0x41, 0xFF), (0x42, 0x01), (0x46, 0x2D), (0x47, 0x0F),
(0x48, 0x3C), (0x49, 0x00), (0x4A, 0x1E), (0x4B, 0x00), (0x4C, 0x20),
(0x4D, 0x00), (0x4E, 0x1A), (0x4F, 0x14), (0x50, 0x00), (0x51, 0x10),
(0x52, 0x00), (0x5C, 0x02), (0x5D, 0x00), (0x5E, 0x10), (0x5F, 0x3F),
(0x60, 0x27), (0x61, 0x28), (0x62, 0x00), (0x63, 0x03), (0x64, 0xF7),
(0x65, 0x03), (0x66, 0xD9), (0x67, 0x03), (0x68, 0x01), (0x69, 0xC8),
(0x6A, 0x40), (0x6D, 0x04), (0x6E, 0x00), (0x6F, 0x00), (0x70, 0x80),
(0x71, 0x00), (0x72, 0x00), (0x73, 0x00), (0x74, 0xF0), (0x75, 0x00),
(0x80, 0x42), (0x81, 0x44), (0x82, 0x04), (0x83, 0x20), (0x84, 0x20),
(0x85, 0x00), (0x86, 0x10), (0x87, 0x00), (0x88, 0x05), (0x89, 0x18),
(0x8A, 0x10), (0x8B, 0x01), (0x8C, 0x37), (0x8D, 0x00), (0x8E, 0xF0),
(0x8F, 0x81), (0x90, 0x06), (0x91, 0x06), (0x92, 0x1E), (0x93, 0x0D),
(0x94, 0x0A), (0x95, 0x0A), (0x96, 0x0C), (0x97, 0x05), (0x98, 0x0A),
(0x99, 0x41), (0x9A, 0x14), (0x9B, 0x0A), (0x9C, 0x3F), (0x9D, 0x33),
(0x9E, 0xAE), (0x9F, 0xF9), (0xA0, 0x48), (0xA1, 0x13), (0xA2, 0x10),
(0xA3, 0x08), (0xA4, 0x30), (0xA5, 0x19), (0xA6, 0x10), (0xA7, 0x08),
(0xA8, 0x24), (0xA9, 0x04), (0xAA, 0x1E), (0xAB, 0x1E), (0xCC, 0x19),
(0xCD, 0x0B), (0xCE, 0x13), (0xCF, 0x64), (0xD0, 0x21), (0xD1, 0x0F),
(0xD2, 0x88), (0xE0, 0x01), (0xE1, 0x04), (0xE2, 0x41), (0xE3, 0xD6),
(0xE4, 0x00), (0xE5, 0x0C), (0xE6, 0x0A), (0xE7, 0x00), (0xE8, 0x00),
(0xE9, 0x00), (0xEE, 0x07),
]
_INIT_BANK1 = [
(0x00, 0x1E), (0x01, 0x1E), (0x02, 0x0F), (0x03, 0x10), (0x04, 0x02),
(0x05, 0x00), (0x06, 0xB0), (0x07, 0x04), (0x08, 0x0D), (0x09, 0x0E),
(0x0A, 0x9C), (0x0B, 0x04), (0x0C, 0x05), (0x0D, 0x0F), (0x0E, 0x02),
(0x0F, 0x12), (0x10, 0x02), (0x11, 0x02), (0x12, 0x00), (0x13, 0x01),
(0x14, 0x05), (0x15, 0x07), (0x16, 0x05), (0x17, 0x07), (0x18, 0x01),
(0x19, 0x04), (0x1A, 0x05), (0x1B, 0x0C), (0x1C, 0x2A), (0x1D, 0x01),
(0x1E, 0x00), (0x21, 0x00), (0x22, 0x00), (0x23, 0x00), (0x25, 0x01),
(0x26, 0x00), (0x27, 0x39), (0x28, 0x7F), (0x29, 0x08), (0x30, 0x03),
(0x31, 0x00), (0x32, 0x1A), (0x33, 0x1A), (0x34, 0x07), (0x35, 0x07),
(0x36, 0x01), (0x37, 0xFF), (0x38, 0x36), (0x39, 0x07), (0x3A, 0x00),
(0x3E, 0xFF), (0x3F, 0x00), (0x40, 0x77), (0x41, 0x40), (0x42, 0x00),
(0x43, 0x30), (0x44, 0xA0), (0x45, 0x5C), (0x46, 0x00), (0x47, 0x00),
(0x48, 0x58), (0x4A, 0x1E), (0x4B, 0x1E), (0x4C, 0x00), (0x4D, 0x00),
(0x4E, 0xA0), (0x4F, 0x80), (0x50, 0x00), (0x51, 0x00), (0x52, 0x00),
(0x53, 0x00), (0x54, 0x00), (0x57, 0x80), (0x59, 0x10), (0x5A, 0x08),
(0x5B, 0x94), (0x5C, 0xE8), (0x5D, 0x08), (0x5E, 0x3D), (0x5F, 0x99),
(0x60, 0x45), (0x61, 0x40), (0x63, 0x2D), (0x64, 0x02), (0x65, 0x96),
(0x66, 0x00), (0x67, 0x97), (0x68, 0x01), (0x69, 0xCD), (0x6A, 0x01),
(0x6B, 0xB0), (0x6C, 0x04), (0x6D, 0x2C), (0x6E, 0x01), (0x6F, 0x32),
(0x71, 0x00), (0x72, 0x01), (0x73, 0x35), (0x74, 0x00), (0x75, 0x33),
(0x76, 0x31), (0x77, 0x01), (0x7C, 0x84), (0x7D, 0x03), (0x7E, 0x01),
]
# ==================
# Estat global
# ==================
_bus: smbus2.SMBus = None
_gesture: int = GS_NONE
_gesture_lock = threading.Lock()
_poll_stop = threading.Event()
# ==================
# Helpers I2C
# ==================
def _select_bank(bank: int):
_bus.write_byte_data(_PAJ7620_ADDR, _REG_BANK_SEL, bank)
def _write(reg: int, val: int):
_bus.write_byte_data(_PAJ7620_ADDR, reg, val)
def _read(reg: int) -> int:
return _bus.read_byte_data(_PAJ7620_ADDR, reg)
# ==================
# Setup
# ==================
def gesture_setup():
"""
Inicialitza el PAJ7620U2 via I2C raw (smbus2, bus 3).
Arrenca el thread de polling (equivalent al ISR del C++).
"""
global _bus
_bus = smbus2.SMBus(3)
# Desperta el sensor (primer accés I2C)
try:
_bus.write_byte(_PAJ7620_ADDR, 0)
except Exception:
pass
time.sleep(0.001) # 700µs d'espera per wake-up
# Verifica ID del dispositiu
_select_bank(0)
id_lsb = _read(_REG_PART_ID_LSB)
id_msb = _read(_REG_PART_ID_MSB)
if id_lsb != 0x20 or id_msb != 0x76:
print(f"ERROR: PAJ7620U2 NOT FOUND (ID: {id_msb:02X}{id_lsb:02X})")
else:
print("Gesture sensor init OK")
# Escriu registres d'inicialització (banc 0)
_select_bank(0)
for reg, val in _INIT_BANK0:
_write(reg, val)
# Escriu registres d'inicialització (banc 1)
_select_bank(1)
for reg, val in _INIT_BANK1:
_write(reg, val)
# Torna al banc 0 per a la lectura de gestos
_select_bank(0)
# Arrenca el thread de polling
_poll_stop.clear()
threading.Thread(target=_poll_loop, daemon=True, name="gesture").start()
def gesture_cleanup():
"""Atura el polling i tanca el bus I2C."""
_poll_stop.set()
if _bus:
_bus.close()
# ==================
# Thread de polling (equivalent al ISR + flag del C++)
# ==================
def _poll_loop():
"""
Llegeix els registres de gest cada 50ms.
Equivalent a on_gesture_interrupt() + gesture_available flag del C++.
"""
global _gesture
while not _poll_stop.is_set():
try:
g0 = _read(_REG_GESTURE_0)
g1 = _read(_REG_GESTURE_1)
detected = GS_NONE
if g0 & _BIT_FORWARD: detected = GS_FORWARD
elif g0 & _BIT_LEFT: detected = GS_LEFT
elif g0 & _BIT_RIGHT: detected = GS_RIGHT
elif g0 & _BIT_UP: detected = GS_UP
elif g0 & _BIT_DOWN: detected = GS_DOWN
elif g0 & _BIT_CW: detected = GS_CLOCKWISE
elif g0 & _BIT_CCW: detected = GS_ANTICLOCKWISE
elif g1 & _BIT_WAVE: detected = GS_WAVE
if detected != GS_NONE:
with _gesture_lock:
_gesture = detected
except Exception:
pass # error I2C puntual → ignora i continua
time.sleep(0.05) # 50ms de polling (20Hz)
# ==================
# Lectura de gest
# ==================
def read_gesture() -> int:
"""
Retorna l'últim gest detectat i el reseteja a GS_NONE.
No bloquejant — equivalent a read_gesture() del C++.
"""
global _gesture
with _gesture_lock:
gest = _gesture
_gesture = GS_NONE
return gest