"""第 8 章：引脚与参数配置（驱动板 v1.1 实测）"""

LEFT_MOTOR_1 = 1
LEFT_MOTOR_2 = 0
RIGHT_MOTOR_1 = 4
RIGHT_MOTOR_2 = 3

ULTRASONIC_TRIG = 7
ULTRASONIC_ECHO = 10

LED_RED = 5
LED_GREEN = 6

SW_LEFT = 21   # SW21
SW_RIGHT = 20  # SW20

SPEED = 60
THRESHOLD_CM = 100
NEAR_CM = 10
BOOT_DELAY_S = 2
MEASURE_INTERVAL_MS = 120
PWM_FREQ = 1000
MAX_DUTY = 1023