Unintentional ASCII char actor showing up on Adafruit serial lcd

Comments

• Publison Posts: 12,366

  2018-07-12 15:43

  Welcome to the forums.
  
  What Parallax product are you trying to use this with? Can you post the code?
• Perpetual_NOOB Posts: 5

  2018-07-12 17:12

  Prop Chip #1
  
  using this
  SparkFun Serial LCD driver.spin
  
  here's the first statement and the "X" appears as soon as the CLS command is given
  
  
  LCD.init(TX_PIN, BAUD, 4, 20) 'Sets buad rate and pin for Adafruit Serial back pack display
  LCD.cls
  wait_ms(100)
  lcd.str(string("Core_5_AD_seccnt_2_roundrobin_rc_2")) 'Splash SCREEN_ST
  
  
  
  of course there is a bunch more code but I used a long pause between statements to watch when the "x" appears and it's there as soon as I use the cls command
• Publison Posts: 12,366

  2018-07-12 21:15

  I'm not sure there is enough information with the code. Which Spin program are you using for LCD?
• jac_goudsmit Posts: 418

  2018-07-12 22:57

  I don't know the Sparkfun Serial LCD driver module but the Serial_LCD module from the library should (also) work fine; All LCD modules use pretty much the same command set. For some reason, the Sparkfun module must be sending the wrong code or maybe it doesn't wait for the display controller to process it.
  

  '' NOTE: untested
  
  VAR
    LCD: "Serial_LCD"
  
  PUB Start
    LCD.Init(TX_PIN, BAUD, 4)
    LCD.Cls
    wait_ms(100) ' Display should be blank
    lcd.str(string("Does this fix it?"))
  

  
  ===Jac
• JonnyMac Posts: 8,927

  2018-07-13 01:15

  I'm confused... the LCD you link to is a parallel LCD. What serial adapter are you using?
• Perpetual_NOOB Posts: 5

  2018-07-16 14:00

  https://www.adafruit.com/product/499
  
  With
  
  https://www.adafruit.com/product/781
  
  Your right, I was too close to the problem when I wrote the post.