Custom Characters BenkyLCDdriver

coryco2

Does anyone have some demo code for setting and displaying custom characters using the BenkyLCDdriver? I tried this way, but it just displays eight characters from the DAT array instead of setting the custom character. What am I missing?

CON

  _clkmode = xtal1 + pll16x                      ' System clock settings
  _xinfreq = 5_000_000

  LCDBasePin    = 1

OBJ
  LCD: "BenkyLCDdriver"                        'Declare LCD display driver

VAR

  LONG maxT                         ' Variable used by LCD driver    
  
PUB Main


  LCD.start( LCDBasePin,0 )                      ' Start LCD Display
  maxT:=LCD.getMax
  waitcnt(clkfreq + cnt)                          ' Wait 1 s before starting

  LCD.exec( LCD#CMD_SETCHAR, @custom1)
  repeat
  

DAT

        custom1   byte    111[8], 0

BenkyLCDdriver.spin

MagIO2

One of the demos packed with the driver shows a small image and then some bar graphs. This is done with custom characters.

MagIO2

Well, actually i found it in all the demos ;o)

  ' Init some special characters
  LCD.exec( LCD#CMD_INSTR, %01000000 ) ' set the character RAM address to 0
  LCD.exec( LCD#CMD_SETCHAR, @char1 )  ' Power plug
  LCD.exec( LCD#CMD_SETCHAR, @char2 )  ' Rails

... where char1 and char2 are 8 byte arrays containing the character data.

MagIO2

If you want to change individual characters at different occasions, you'd set the character ram address to a value different than %000000 (the 6 least significant bits in the first exec in the example above).
LCD.exec( LCD#CMD_INSTR, %01000000 + charNumber * 8 )
with a charNumber between 0 and 7 and then send 8 bytes with the LCD#CMD_SETCHAR command. With each byte sent to the display the cgram pointer is increased automatically. So, after writing one character the pointer points to the next character.

coryco2

@MagIO2

Thanks for replies! Sorry, I misplaced the demos for driver and wasn't able to find it on the OBEX any more (?) Could you please post the demo or complete driver archive or direct me to where it is on the OBEX now?

MagIO2

You are welcome! It is here
http://obex.parallax.com/object/270