1  """
  2  This will show some Linux Statistics on the attached display. Be sure to adjust
  3  to the display you have connected. Be sure to check the learn guides for more
  4  usage information.
  5  
  6  This example is for use on (Linux) computers that are using CPython with
  7  Adafruit Blinka to support CircuitPython libraries. CircuitPython does
  8  not support PIL/pillow (python imaging library)!
  9  """
 10  
 11  import time
 12  import subprocess
 13  import digitalio
 14  import board
 15  from PIL import Image, ImageDraw, ImageFont
 16  import adafruit_rgb_display.ili9341 as ili9341
 17  import adafruit_rgb_display.st7789 as st7789  # pylint: disable=unused-import
 18  import adafruit_rgb_display.hx8357 as hx8357  # pylint: disable=unused-import
 19  import adafruit_rgb_display.st7735 as st7735  # pylint: disable=unused-import
 20  import adafruit_rgb_display.ssd1351 as ssd1351  # pylint: disable=unused-import
 21  import adafruit_rgb_display.ssd1331 as ssd1331  # pylint: disable=unused-import
 22  
 23  # Configuration for CS and DC pins (these are PiTFT defaults):
 24  cs_pin = digitalio.DigitalInOut(board.CE0)
 25  dc_pin = digitalio.DigitalInOut(board.D25)
 26  reset_pin = digitalio.DigitalInOut(board.D24)
 27  
 28  # Config for display baudrate (default max is 24mhz):
 29  BAUDRATE = 24000000
 30  
 31  # Setup SPI bus using hardware SPI:
 32  spi = board.SPI()
 33  
 34  # pylint: disable=line-too-long
 35  # Create the display:
 36  # disp = st7789.ST7789(spi, rotation=90,                            # 2.0" ST7789
 37  # disp = st7789.ST7789(spi, height=240, y_offset=80, rotation=180,  # 1.3", 1.54" ST7789
 38  # disp = st7789.ST7789(spi, rotation=90, width=135, height=240, x_offset=53, y_offset=40, # 1.14" ST7789
 39  # disp = hx8357.HX8357(spi, rotation=180,                           # 3.5" HX8357
 40  # disp = st7735.ST7735R(spi, rotation=90,                           # 1.8" ST7735R
 41  # disp = st7735.ST7735R(spi, rotation=270, height=128, x_offset=2, y_offset=3,   # 1.44" ST7735R
 42  # disp = st7735.ST7735R(spi, rotation=90, bgr=True,                 # 0.96" MiniTFT ST7735R
 43  # disp = ssd1351.SSD1351(spi, rotation=180,                         # 1.5" SSD1351
 44  # disp = ssd1351.SSD1351(spi, height=96, y_offset=32, rotation=180, # 1.27" SSD1351
 45  # disp = ssd1331.SSD1331(spi, rotation=180,                         # 0.96" SSD1331
 46  disp = ili9341.ILI9341(
 47      spi,
 48      rotation=90,  # 2.2", 2.4", 2.8", 3.2" ILI9341
 49      cs=cs_pin,
 50      dc=dc_pin,
 51      rst=reset_pin,
 52      baudrate=BAUDRATE,
 53  )
 54  # pylint: enable=line-too-long
 55  
 56  # Create blank image for drawing.
 57  # Make sure to create image with mode 'RGB' for full color.
 58  if disp.rotation % 180 == 90:
 59      height = disp.width  # we swap height/width to rotate it to landscape!
 60      width = disp.height
 61  else:
 62      width = disp.width  # we swap height/width to rotate it to landscape!
 63      height = disp.height
 64  
 65  image = Image.new("RGB", (width, height))
 66  
 67  # Get drawing object to draw on image.
 68  draw = ImageDraw.Draw(image)
 69  
 70  # Draw a black filled box to clear the image.
 71  draw.rectangle((0, 0, width, height), outline=0, fill=(0, 0, 0))
 72  disp.image(image)
 73  
 74  # First define some constants to allow easy positioning of text.
 75  padding = -2
 76  x = 0
 77  
 78  # Load a TTF font.  Make sure the .ttf font file is in the
 79  # same directory as the python script!
 80  # Some other nice fonts to try: http://www.dafont.com/bitmap.php
 81  font = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", 24)
 82  
 83  while True:
 84      # Draw a black filled box to clear the image.
 85      draw.rectangle((0, 0, width, height), outline=0, fill=0)
 86  
 87      # Shell scripts for system monitoring from here:
 88      # https://unix.stackexchange.com/questions/119126/command-to-display-memory-usage-disk-usage-and-cpu-load
 89      cmd = "hostname -I | cut -d' ' -f1"
 90      IP = "IP: " + subprocess.check_output(cmd, shell=True).decode("utf-8")
 91      cmd = "top -bn1 | grep load | awk '{printf \"CPU Load: %.2f\", $(NF-2)}'"
 92      CPU = subprocess.check_output(cmd, shell=True).decode("utf-8")
 93      cmd = "free -m | awk 'NR==2{printf \"Mem: %s/%s MB  %.2f%%\", $3,$2,$3*100/$2 }'"
 94      MemUsage = subprocess.check_output(cmd, shell=True).decode("utf-8")
 95      cmd = 'df -h | awk \'$NF=="/"{printf "Disk: %d/%d GB  %s", $3,$2,$5}\''
 96      Disk = subprocess.check_output(cmd, shell=True).decode("utf-8")
 97      cmd = "cat /sys/class/thermal/thermal_zone0/temp |  awk '{printf \"CPU Temp: %.1f C\", $(NF-0) / 1000}'"  # pylint: disable=line-too-long
 98      Temp = subprocess.check_output(cmd, shell=True).decode("utf-8")
 99  
100      # Write four lines of text.
101      y = padding
102      draw.text((x, y), IP, font=font, fill="#FFFFFF")
103      y += font.getsize(IP)[1]
104      draw.text((x, y), CPU, font=font, fill="#FFFF00")
105      y += font.getsize(CPU)[1]
106      draw.text((x, y), MemUsage, font=font, fill="#00FF00")
107      y += font.getsize(MemUsage)[1]
108      draw.text((x, y), Disk, font=font, fill="#0000FF")
109      y += font.getsize(Disk)[1]
110      draw.text((x, y), Temp, font=font, fill="#FF00FF")
111  
112      # Display image.
113      disp.image(image)
114      time.sleep(0.1)