HD44780_sys_2.py 文件源码

def __init__(self):

        if gv.IS_DEBIAN:
            self.thread_sleep = 0.1
        else:
            self.thread_sleep = 0.2

        self.timeout_init = 3  # 3 sec
        self.timeout_init /= self.thread_sleep  # Adjust according to while loop sleep time
        self.timeout = self.timeout_init
        self.display_called = False

        if (gv.USE_HD44780_16x2_LCD or gv.USE_HD44780_20x4_LCD) and gv.IS_DEBIAN:

            import lcdcustomchars as lcdcc
            import RPi.GPIO as GPIO
            from RPLCD import CharLCD

            self.lcd = CharLCD(pin_rs=gv.GPIO_LCD_RS, pin_rw=None, pin_e=gv.GPIO_LCD_E,
                          pins_data=[gv.GPIO_LCD_D4, gv.GPIO_LCD_D5, gv.GPIO_LCD_D6, gv.GPIO_LCD_D7],
                          numbering_mode=GPIO.BCM, cols=gv.LCD_COLS, rows=gv.LCD_ROWS)

            self.lcd.create_char(1, lcdcc.block)
            self.lcd.create_char(2, lcdcc.arrow_right_01)
            self.lcd.create_char(3, lcdcc.voice_button_on)
            self.lcd.create_char(4, lcdcc.voice_button_off)

        if (gv.USE_HD44780_16x2_LCD or gv.USE_HD44780_20x4_LCD) and gv.SYSTEM_MODE == 2:

            self.STRING_1 = ''
            self.STRING_2 = ''

        self.LCDThread = threading.Thread(target=self.lcd_main)
        self.LCDThread.daemon = True
        self.LCDThread.start()

        # time.sleep(0.5)
        # display('Start SamplerBox') # bug: the way autochorder is loaded causes issue
        # time.sleep(0.5)