Confused on READ and DATA. Need a little help :)
eagletalontim
Posts: 1,399
I have been trying to conserve space in the SX28 chips and am trying to use the READ and DATA functions. I have looked at several examples and read how to use them in the SX/B help file but am still lost and cannot get my code to work right [noparse]:([/noparse]
Here is what I have :
The usage is showmenu menu_number.
The PUT Line1(idx) is the same as used in one of the examples in the SX/B help file.
When it displays it on the LCD, it shows part of one string on the wrong line and it even parts of another menu string. What am I doing wrong?
This is what I get with using showmenu 3
LCD Line1 : u 1 Menu 2 Menu
LCD Line2 : t for Menu1 Tex
Thanks for the help in advance!
Here is what I have :
showmenu:
temp1 = __PARAM1
temp2 = temp1
FOR idx = 0 TO 15
READ Menu1 + temp1, temp3
INC temp1
PUT line1(idx), temp3
NEXT
FOR idx = 0 TO 15
READ Menu2 + temp2, temp3
INC temp2
PUT line2(idx), temp3
NEXT
UPDATE_L1
UPDATE_L2
RETURN
........
Menu1:
DATA "Menu 1",0
DATA "Menu 2",0
DATA "Menu 3",0
DATA "Menu 4",0
Menu2:
DATA "Text for Menu 1",0
DATA "Text for Menu 2",0
DATA "Text for Menu 3",0
DATA "Text for Menu 4",0
The usage is showmenu menu_number.
The PUT Line1(idx) is the same as used in one of the examples in the SX/B help file.
When it displays it on the LCD, it shows part of one string on the wrong line and it even parts of another menu string. What am I doing wrong?
This is what I get with using showmenu 3
LCD Line1 : u 1 Menu 2 Menu
LCD Line2 : t for Menu1 Tex
Thanks for the help in advance!
Comments
http://forums.parallax.com/showthread.php?p=771380
Check out his LCD_4_Menus.SXB attached later in the post.· What you need to do is to·present the correct "offset" which·in his prog is·the data field named "LineOffset"·.· Look over this post, especially the last few dialogues.
Kevin
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Bad spellers of the world untie!
Thanks!
Tim
Take a look at this stripped down program for LCD display also:
' ========================================================================= ' ' File...... LCD_Display ' Purpose... Example LCD display program ' Author.... Timothy Gilmore ' E-mail.... [url=mailto:gilmoret@us.saic.com]gilmoret@us.saic.com[/url] ' Started... 13 JAN 2008 ' ' ========================================================================= ' ------------------------------------------------------------------------- ' Program Description ' ------------------------------------------------------------------------- ' ------------------------------------------------------------------------- ' Device Settings ' ------------------------------------------------------------------------- DEVICE SX28, OSCXT2, TURBO, STACKX, OPTIONX FREQ 20_000_000 'Use external 20MHz resonator ' ------------------------------------------------------------------------- ' IO Pins ' ------------------------------------------------------------------------- LCD_TxPin PIN RA.0 OUTPUT 'RA.0 pin used for Serial LCD ' ------------------------------------------------------------------------- ' Constants ' ------------------------------------------------------------------------- LcdBaud CON "T19200" ' Baud rate = 19200 -> SW1 ON, SW2 ON LcdBkSpc CON $08 ' move cursor left LcdRt CON $09 ' move cursor right LcdLF CON $0A ' move cursor down 1 line LcdCls CON $0C ' clear LCD (need 500 ms delay) LcdCR CON $0D ' move to position 0 of next line LcdBLon CON $11 ' backlight on LcdBLoff CON $12 ' backlight off LcdOff CON $15 ' LCD off LcdOn1 CON $16 ' LCD on; no crsr, no blink LcdOn2 CON $17 ' LCD on; no crsr, blink on LcdOn3 CON $18 ' LCD on; crsr on, no blink LcdOn4 CON $19 ' LCD on; crsr on, blink on LcdLine0Pos0 CON $80 ' move to line 0, position 0 LcdLine0Pos1 CON $81 ' move to line 0, position 1 LcdLine0Pos2 CON $82 ' move to line 0, position 2 LcdLine0Pos3 CON $83 ' move to line 0, position 3 LcdLine0Pos4 CON $84 ' move to line 0, position 4 LcdLine0Pos5 CON $85 ' move to line 0, position 5 LcdLine0Pos6 CON $86 ' move to line 0, position 6 LcdLine0Pos7 CON $87 ' move to line 0, position 7 LcdLine0Pos8 CON $88 ' move to line 0, position 8 LcdLine0Pos9 CON $89 ' move to line 0, position 9 LcdLine0Pos10 CON $8A ' move to line 0, position 10 LcdLine0Pos11 CON $8B ' move to line 0, position 11 LcdLine0Pos12 CON $8C ' move to line 0, position 12 LcdLine0Pos13 CON $8D ' move to line 0, position 13 LcdLine0Pos14 CON $8E ' move to line 0, position 14 LcdLine0Pos15 CON $8F ' move to line 0, position 15 LcdLine1Pos0 CON $94 ' move to line 1, position 0 LcdLine1Pos1 CON $95 ' move to line 1, position 1 LcdLine1Pos2 CON $96 ' move to line 1, position 2 LcdLine1Pos3 CON $97 ' move to line 1, position 3 LcdLine1Pos4 CON $98 ' move to line 1, position 4 LcdLine1Pos5 CON $99 ' move to line 1, position 5 LcdLine1Pos6 CON $9A ' move to line 1, position 6 LcdLine1Pos7 CON $9B ' move to line 1, position 7 LcdLine1Pos8 CON $9C ' move to line 1, position 8 LcdLine1Pos9 CON $9D ' move to line 1, position 9 LcdLine1Pos10 CON $9E ' move to line 1, position 10 LcdLine1Pos11 CON $9F ' move to line 1, position 11 LcdLine1Pos12 CON $A0 ' move to line 1, position 12 LcdLine1Pos13 CON $A1 ' move to line 1, position 13 LcdLine1Pos14 CON $A2 ' move to line 1, position 14 LcdLine1Pos15 CON $A3 ' move to line 1, position 15 ' ------------------------------------------------------------------------- ' Variables ' ------------------------------------------------------------------------- tmpB1 VAR Byte ' work vars tmpW1 VAR Word temp1 VAR Byte ' work vars temp2 VAR Byte tmp1 VAR BYTE ' work vars ' ========================================================================= PROGRAM Start ' ========================================================================= ' ------------------------------------------------------------------------- ' Subroutine Declarations ' ------------------------------------------------------------------------- SEROUTLCD SUB 1 DISPLAY_TEXT SUB 2 DELAY SUB 1, 2 ' delay in milliseconds ' ------------------------------------------------------------------------- ' Program Code ' ------------------------------------------------------------------------- Start: HIGH LCD_TxPin SEROUTLCD LcdCls ' Clear the screen DELAY 500 SEROUTLCD LCDBLon ' Turn on the Backlight (Backlight model only) SEROUTLCD LCDON1 Main: ' Display 1st message on both lines on LCD SEROUTLCD LcdLine0Pos0 DISPLAY_TEXT Msg1a ' Subroutine call to display text in DATA MSG1a statement. SEROUTLCD LcdLine1Pos0 DISPLAY_TEXT Msg1b ' Subroutine call to display text in DATA MSG1b statement. Goto Main END ' ------------------------------------------------------------------------- ' Subroutine Code ' ------------------------------------------------------------------------- ' Use: DELAY base {, multiplier} ' -- pause for 'base' * (optional) 'multiplier' milliseconds SUB DELAY ' delay x { * y } ms temp1 = __PARAM1 IF __PARAMCNT = 1 THEN temp2 = 1 ELSE temp2 = __PARAM2 ENDIF IF temp1 > 0 THEN IF temp2 > 0 THEN PAUSE temp1 * temp2 ENDIF ENDIF ENDSUB SUB SEROUTLCD tmp1 = __PARAM1 ' Capture the passed byte SEROUT LCD_TxPin, LcdBaud, tmp1 ' Tx Byte ENDSUB ' return to caller ' Use: DISPLAY_TEXT [noparse][[/noparse]String | Label] ' -- pass embedded string literal or DATA label (zString at label) SUB DISPLAY_TEXT tmpW1 = __WPARAM12 ' get address of string DO READINC tmpW1, tmpB1 ' read a character IF tmpB1 = 0 THEN EXIT ' if 0, string complete SEROUTLCD tmpB1 ' send the byte LOOP ENDSUB ' ------------------------------------------------------------------------- ' DATA ' ------------------------------------------------------------------------- Msg1a: DATA "This is line 0", 0 ' Up to 16 LCD character message Msg1b: DATA "& this is line 1", 0 ' Up to 16 LCD character message