main.py

   1 import utime
   2
   3 from machine import I2C
   4 from lcd_api import LcdApi
   5 from pico_i2c_lcd import I2cLcd
   6
   7 I2C_ADDR     = 0x27
   8 I2C_NUM_ROWS = 4
   9 I2C_NUM_COLS = 20
  10
  11 def test_main():
  12     """Test function for verifying basic functionality."""
  13     print("Running test_main")
  14     i2c = I2C(0, sda=machine.Pin(0), scl=machine.Pin(1), freq=400000)
  15     lcd = I2cLcd(i2c, I2C_ADDR, I2C_NUM_ROWS, I2C_NUM_COLS)
  16     lcd.putstr("It Works!\nSecond line!\nThird Line!\nFourth Line!")
  17     utime.sleep(2)
  18     lcd.clear()
  19     count = 0
  20     while True:
  21         lcd.clear()
  22         lcd.putstr("%7d" % (utime.time() // 1000))
  23         if count % 10 == 0:
  24             print("Turning cursor on")
  25             lcd.show_cursor()
  26         if count % 10 == 1:
  27             print("Turning cursor off")
  28             lcd.hide_cursor()
  29         if count % 10 == 2:
  30             print("Turning blink cursor on")
  31             lcd.blink_cursor_on()
  32         if count % 10 == 3:
  33             print("Turning blink cursor off")
  34             lcd.blink_cursor_off()
  35         if count % 10 == 4:
  36             print("Turning backlight off")
  37             lcd.backlight_off()
  38         if count % 10 == 5:
  39             print("Turning backlight on")
  40             lcd.backlight_on()
  41         if count % 10 == 6:
  42             print("Turning display off")
  43             lcd.display_off()
  44         if count % 10 == 7:
  45             print("Turning display on")
  46             lcd.display_on()
  47         if count % 10 == 8:
  48             print("Filling display")
  49             lcd.clear()
  50             string = ""
  51             for x in range(32, 32+I2C_NUM_ROWS*I2C_NUM_COLS):
  52                 string += chr(x)
  53             lcd.putstr(string)
  54         count += 1
  55         utime.sleep(2)
  56
  57 #if __name__ == "__main__":
  58 test_main()