Picaxe Tron

stan74

Senior Member
#1
Messing round with a diddy oled and thought let's do space invaders but too slow, so here's badly filmed Tron.
I needed a 28x2 because it need 1K for the graphics..if you could call them that.
There's a deliberate flaw in the picaxes control or it would be impossible to beat unless it ran out of space. It's hard anyway any way. I won once in the video. https://youtu.be/cL46P2ywqKk
 

stan74

Senior Member
#2
Here's a better video and the code in parts. https://www.youtube.com/watch?v=gGenryUZBa4
Code:
;128x64 oled working 7/11/16
;game added 8/2/17
#picaxe 28x2
setfreq em64
;b52 to b55 used
symbol x1=b0 ;line variables
symbol x2=b1
symbol y1=b2
symbol y2=b3
symbol px=b4
symbol py=b5
symbol sx=b6
symbol sy=b7
symbol dx=b8
symbol dy=b9
symbol pixel=b10
symbol er=w6
symbol e2=w7
;
SYMBOL  DispNum  = W8 ;print variables
SYMBOL  row = b18
SYMBOL  col = b19
SYMBOL  temp  =b20
SYMBOL  aByte =b21
SYMBOL  index = b22
;game added
symbol temp1=b23 ;game variables
symbol temp2=b24
symbol x1d=b25
symbol y1d=b27
symbol x1p=b28
symbol y1p=b29
symbol pset=b30
symbol x2d=b31
symbol y2d=b32
symbol x2p=b33
symbol y2p=b34
symbol tx=b35
symbol ty=b36
;
SYMBOL TWI_BUFFER_LENGTH 		= 32 ;oled control codes	
SYMBOL SSD1306_LCDWIDTH   		= 128
SYMBOL SSD1306_LCDHEIGHT            = 64
SYMBOL SSD1306_SETCONTRAST 		=0x81
SYMBOL SSD1306_DISPLAYALLON_RESUME 	=0xA4
SYMBOL SSD1306_DISPLAYALLON 		=0xA5
SYMBOL SSD1306_NORMALDISPLAY 		=0xA6
SYMBOL SSD1306_INVERTDISPLAY 		=0xA7
SYMBOL SSD1306_DISPLAYOFF 		=0xAE
SYMBOL SSD1306_DISPLAYON 		=0xAF	
SYMBOL SSD1306_SETDISPLAYOFFSET 	=0xD3
SYMBOL SSD1306_SETCOMPINS 		=0xDA	
SYMBOL SSD1306_SETVCOMDETECT 		=0xDB	
SYMBOL SSD1306_SETDISPLAYCLOCKDIV 	=0xD5
SYMBOL SSD1306_SETPRECHARGE 		=0xD9
SYMBOL SSD1306_SETMULTIPLEX 		=0xA8	
SYMBOL SSD1306_SETLOWCOLUMN 		=0x00
SYMBOL SSD1306_SETHIGHCOLUMN 		=0x10
SYMBOL SSD1306_SETSTARTLINE 		=0x40
SYMBOL SSD1306_MEMORYMODE 		=0x20
SYMBOL SSD1306_COLUMNADDR 		=0x21
SYMBOL SSD1306_PAGEADDR   		=0x22		; Page 0-7 represents line 0 - 7
SYMBOL SSD1306_COMSCANINC 		=0xC0
SYMBOL SSD1306_COMSCANDEC 		=0xC8
SYMBOL SSD1306_SEGREMAP 		=0xA0 | 1
SYMBOL SSD1306_CHARGEPUMP 		=0x8D
SYMBOL SSD1306_EXTERNALVCC 		=0x1
SYMBOL SSD1306_SWITCHCAPVCC 		=0x2
;Scrolling SYMBOLs
SYMBOL ACTIVATE_SCROLL 				=0x2F
SYMBOL DEACTIVATE_SCROLL 			=0x2E
SYMBOL SET_VERTICAL_SCROLL_AREA 		=0xA3
SYMBOL RIGHT_HORIZONTAL_SCROLL 		=0x26
SYMBOL LEFT_HORIZONTAL_SCROLL 		=0x27
SYMBOL VERT_AND_RIGHT_HORIZONTAL 		=0x29
SYMBOL VERT_AND_LEFT_HORIZONTAL 		=0x2A   
;;**************************************************************   
SYMBOL  SSD1306_ADDR  = $3C << 1    ; this is the I2C address ($78)
;------------------------------
main:
dirsb=%00001111
gosub InitialiseLcd
gosub clearbuffer
gosub ClearDisplay
;
let row=5:let col=6:gosub setposition
eeprom 31, ("PRESS A BUTTON")
for index = 31 TO 44
	read index,aByte
	gosub displayChar
next index
do while pinsb=0:random w25:gosub sine:loop ;wait for button press
gosub clearbuffer
gosub ClearDisplay
;
;draw boarder
x1=0:y1=0:x2=127:y2=0:gosub line
x1=0:y1=63:x2=127:y2=63:gosub line
x1=0:y1=0:x2=0:y2=63:gosub line
x1=127:y1=0:x2=127:y2=63:gosub line
;
;plot a dot at random y left and right to make picaxe not follow border
px=1:py=b50/8+16:gosub plot2screenram ;left dot ; must sort out
random w25
px=126:py=b50/8+16:gosub plot2screenram ;right dot
;random w25 ;optional dots to deflect picaxe
;py=1:px=b50/4+32:gosub plot2screenram ;top dot
;random w25
;py=62:px=b50/4+32:gosub plot2screenram ;bottom dot

;define start positions and directions
random w25:y1p=b50/8+16
random w25:y2p=b50/8+16
x1p=90:x1d=255:y1d=0:px=x1p:py=y1p:gosub plot2screenram ; plot player
x2p=30:y2p=40:x2d=1:y2d=0:px=x1p:py=y1p:gosub plot2screenram ; plot picaxe
start:
;
;testkeys
b50=pinsb and 240
if b50=16 then ;up key pressed
	x1d=0:y1d=255
elseif b50=32 then ;down key pressed
	x1d=0:y1d=1
elseif b50=64 then ;left key pressed
	x1d=255:y1d=0
else if b50=128 then ;right key pressed
	x1d=1:y1d=0
endif
x1p=x1p+x1d:y1p=y1p+y1d ;player direction 
;
;test pixel ahead
if x1d=1 then:tx=x1p+1:ty=y1p ;going right
elseif x1d=255 then:tx=x1p-1:ty=y1p	;going left
elseif y1d=1 then:ty=y1p+1:tx=x1p ;going down
else ty=y1p-1:tx=x1p ;going up
endif
gosub point
if pset=0 then:goto player_not_crashed:endif ;no object ahead
;
gosub flashscreen
gosub clearbuffer
gosub ClearDisplay
row=3:col=10:gosub setposition
eeprom 84, ("YOU LOST")
for index = 84 TO 91
	read index,aByte
	gosub displayChar;
next index
pause 4:goto main
;
player_not_crashed:
px=x1p:py=y1p:gosub plot2screenram ;plot player
;
;**** picaxe manouver ****
x2p=x2p+x2d:y2p=y2p+y2d ;picaxe diection
if x2d=1 then ;going right
	tx=x2p+1:ty=y2p
	gosub point
	if pset>0 then ;object ahead..change direction
		x2d=0
		if y1p>=y2p then
			y2d=1
		else y2d=255
		endif
	endif:goto picaxe_crash_test
elseif x2d=255 then ;going left
	tx=x2p-1:ty=y2p
	gosub point
	if pset>0 then ;object ahead..change direction
		x2d=0
		if y1p>=y2p then
			y2d=1
		else y2d=255
		endif
	endif:goto picaxe_crash_test	
endif	
if y2d=1 then ;going down
	tx=x2p:ty=y2p+1
	gosub point
	if pset>0 then ;object ahead..change direction
		y2d=0
		if x1p>=x2p then
			x2d=1
		else x2d=255
		endif:goto picaxe_crash_test
	endif
elseif y2d=255 then ;going up
	tx=x2p:ty=y2p-1
	gosub point
	if pset>0 then ;object ahead..change direction
		y2d=0
		if x1p>=x2p then
			x2d=1
		else x2d=255
		endif:goto picaxe_crash_test
	endif	
endif		
picaxe_crash_test:
tx=x2p:ty=y2p:gosub point ;has picaxe crashed?
if pset=0 then:goto plotpicaxe:endif ;not crashed
;picaxe crashed...on purpose
gosub flashscreen
gosub clearbuffer
gosub ClearDisplay
row = 3:col = 10:gosub setposition
eeprom 77, ("YOU WIN")
for index = 77 TO 83
	read index,aByte
	gosub displayChar;
next index
pause 4:goto main
plotpicaxe:
px=x2p:py=y2p:gosub plot2screenram ; plot picaxe
goto start
;************************* end of game code *************************************************************
 
Last edited:

stan74

Senior Member
#3
rest of the code
Code:
flashscreen:
for temp=1 to 20
hi2cout (0,SSD1306_INVERTDISPLAY)
pause 10
hi2cout (0,SSD1306_NORMALDISPLAY)
next temp
return
point:
pixel=ty And 7; pixel position
ptr=ty And $F8<<4 Or tx
pset=1<<pixel and @ptr ; pixel
return
; spare ram 56 to 255
;----------------------------------------------------------------
ClearDisplay: ;clears oled screen
hi2cout (0,SSD1306_PAGEADDR)
hi2cout (0,0) ;set row=0
hi2cout (0,7)
;	
hi2cout (0,SSD1306_COLUMNADDR)
hi2cout (0,0) ;set column=0
hi2cout (0,127)
;
for ptr=0 to 1023
	hi2cout (64,0)
next ptr
;
return
clearbuffer:
for ptr=0 to 1023
	@ptr=0
next ptr
return
sendbuffer:
hi2cout (0,SSD1306_PAGEADDR)
hi2cout (0,0) ;set row=0
hi2cout (0,7)
;	
hi2cout (0,SSD1306_COLUMNADDR)
hi2cout (0,0) ;set column=0
hi2cout (0,127)
;
for ptr=0 to 1023
	hi2cout (64,@ptr);,64,@ptrinc,64,@ptrinc,64,@ptrinc,64,@ptrinc,64,@ptrinc,64,@ptrinc,64,@ptrinc)
next ptr
return
plot2screenram:
pixel=py and 7
ptr=py and $F8<<4 Or px
@ptr=1<<pixel Or @ptr ;in buffer
;
let row=py>>3
hi2cout (0,SSD1306_PAGEADDR)
hi2cout (0,row)
hi2cout (0,7)
hi2cout (0,SSD1306_COLUMNADDR)
hi2cout (0,px)
hi2cout (0,127)
hi2cout (64,@ptr) ;oled screen byte
return
xorplot2screenram:
pixel=py And 7
ptr=py And $F8<<4 Or px
@ptr=1<<pixel xor @ptr ;in buffer
;
row=py>>3
hi2cout (0,SSD1306_PAGEADDR)
hi2cout (0,row)
hi2cout (0,7)
hi2cout (0,SSD1306_COLUMNADDR)
hi2cout (0,px)
hi2cout (0,127)
hi2cout (64,@ptr) ;oled screen byte
return
plot2buffer:
pixel=py And 7; pixel position
ptr=py And $F8<<4 Or px
@ptr=1<<pixel Or @ptr ; screen byte in buffer
return
line:
if x1<x2 then:sx=1:dx=x2-x1:else sx=-1:dx=x1-x2:endif
if y1<y2 then :sy=1:dy=y2-y1:else sy=-1:dy=y1-y2:endif
if dx>dy then:er=dx:else er=dy:endif
dx=dx+dx:dy=dy+dy:py=y1:px=x1
if dx>dy then
	do
;gosub plot2screenram
		pixel=py And 7
		ptr=py And $F8 << 4 Or px
		@ptr=1<<pixel Or @ptr 
		row=py>>3
		hi2cout (0,SSD1306_PAGEADDR)
		hi2cout (0,row)
		hi2cout (0,7)
		hi2cout (0,SSD1306_COLUMNADDR)
		hi2cout (0,px)
		hi2cout (0,127)
		hi2cout (64,@ptr)
;
		er=er-dy
		if er>32767 then
			er=er+dx:py=py+sy 
		endif
		px=px+sx
	loop while px<>x2
else
	do
;gosub plot2screenram			
		pixel=py And 7
		ptr=py And $F8 << 4 Or px
		@ptr=1<<pixel Or @ptr ; screen byte
		row=py>>3
		hi2cout (0,SSD1306_PAGEADDR)
		hi2cout (0,row)
		hi2cout (0,7)
		hi2cout (0,SSD1306_COLUMNADDR)
		hi2cout (0,px)
		hi2cout (0,127)
		hi2cout (64,@ptr) ;plot pixel on screen
;
		er=er-dx
		if er>32767 then
			er=er+dy:px=px+sx
		endif
		py=py+sy		
	loop while py<>y2
endif
return
xorline:
if x1<x2 then:sx=1:dx=x2-x1:else sx=-1:dx=x1-x2:endif
if y1<y2 then:sy=1:dy=y2-y1:else sy=-1:dy=y1-y2:endif
if dx>dy then:er=dx:else er=dy : endif
dx=dx+dx:dy=dy+dy:py=y1:px=x1
if dx>dy then
	do
		gosub xorplot2screenram
		er=er-dy
		if er>32767 then
			er=er+dx:py=py+sy 
		endif
		px=px+sx
	loop while px<>x2
else
	do
		gosub xorplot2screenram			
		er=er-dx
		if er>32767 then
			er=er+dy:px=px+sx
		endif
		py=py+sy		
	loop while py<>y2
endif
return
sine:
eeprom 46, (34,40,46,50,54,58,60,62,62,60,58,54,50,46,40,34,28,22,18,14,10,8,6,6,8,10,14,18,22,28,34)
x1=0
read 46,y1:y1=y1/2
for temp2=1 to 2
for temp1 = 47 to 76
read temp1,y2
y2=y2/2
x2=x1+2
gosub xorline
x1=x2
y1=y2
next temp1
next temp2
return
InitialiseLcd:	
PAUSE 500
i2cslave SSD1306_ADDR, i2cfast_64, i2cbyte
	
for index = 0 TO 23
	read index,aByte
	hi2cout (0,aByte)
next
		
eeprom 0, (SSD1306_DISPLAYOFF);                   ; 0xAE
eeprom 1, (SSD1306_SETDISPLAYCLOCKDIV);           ; 0xD5
eeprom 2, (0x80);                                 ; the suggested ratio 0x80
eeprom 3, (SSD1306_SETMULTIPLEX);                 ; 0xA8
eeprom 4, (0x3F);
eeprom 5, (SSD1306_SETDISPLAYOFFSET);             ; 0xD3
eeprom 6, (0x0);                                  ; no offset
eeprom 7, (SSD1306_SETSTARTLINE);            	  ; line #0
eeprom 8, (SSD1306_CHARGEPUMP);                   ; 0x8Deeprom 9, (0x14
eeprom 9, (0x14);						  ; INTERNAL VCC
eeprom 10, (SSD1306_MEMORYMODE);                  ; 0x20
eeprom 11, (0x00);                                ; Horiz mode. 0x0 act like ks0108
eeprom 12, (SSD1306_SEGREMAP);
eeprom 13, (SSD1306_COMSCANDEC);
eeprom 14, (SSD1306_SETCOMPINS);                  ; 0xDA
eeprom 15, (0x12);
eeprom 16, (SSD1306_SETCONTRAST);                 ; 0x81
eeprom 17, (0xCF)						  ; INTERNAL VCC
eeprom 18, (SSD1306_SETPRECHARGE);                ; 0xd9
eeprom 19, (0xF1)						  ; INTERNAL VCC
eeprom 20, (SSD1306_SETVCOMDETECT);               ; 0xDB
eeprom 21, (0x40);
eeprom 22, (SSD1306_DISPLAYALLON_RESUME);         ; 0xA4
eeprom 23, (SSD1306_DISPLAYON);                	  ; 0xA4	
'eeprom 24, (SSD1306_DISPLAYALLON);               ; 0xA5          
return
 

stan74

Senior Member
#4
last bit
Code:
DirectSendCmd:
' Commands are preceeded by a 0 filled byte    
hi2cout (0,abyte)   
return
;SEND INIT CMD BYTE - SEND CMD BYTE - SEND DATA BYTE
SetPosition:
	'20 line x 4 rows is accompished by wrapping the text on each line past 20 characters to two lines down (not next line down). Position 20 (dec) is row 3, col 1
abyte= SSD1306_PAGEADDR
hi2cout (0,abyte)
abyte = row
hi2cout (0,abyte)
abyte = 7
hi2cout (0,abyte)
	
abyte= SSD1306_COLUMNADDR
col = col * 5 ;columns per character
hi2cout (0,abyte)
abyte = col
hi2cout (0,abyte)
abyte = 127
hi2cout (0,abyte)
return
   
	' STANDARD FONT

	' This is the ASCII Font table 0 starting at space and ending at Z -- lower case is not included (not enough memory)
	' The first 8 are in program direct writes

	'table (0x00, 0x00, 0x00, 0x00, 0x00)	' Space
	'table (0x00, 0x00, 0x5F, 0x00, 0x00)	' !
	'table (0x00, 0x07, 0x00, 0x07, 0x00) 	' "
	'table (0x14, 0x7F, 0x14, 0x7F, 0x14) 	' #
	'table (0x24, 0x2A, 0x7F, 0x2A, 0x12) 	' $
	'table (0x23, 0x13, 0x08, 0x64, 0x62) 	' %
	'table (0x36, 0x49, 0x56, 0x20, 0x50) 	' &
	'table (0x00, 0x08, 0x07, 0x03, 0x00) 	' '

	table (0x00, 0x1C, 0x22, 0x41, 0x00) 	' (
	table (0x00, 0x41, 0x22, 0x1C, 0x00) 	' )
	table (0x2A, 0x1C, 0x7F, 0x1C, 0x2A) 	' *
	table (0x08, 0x08, 0x3E, 0x08, 0x08) 	' +
	table (0x00, 0x80, 0x70, 0x30, 0x00) 	' ,
	table (0x08, 0x08, 0x08, 0x08, 0x08)	' -
  	table (0x00, 0x00, 0x5F, 0x00, 0x0)		' .
	table (0x20, 0x10, 0x08, 0x04, 0x02)	' /
	
	table (0x3E, 0x51, 0x49, 0x45, 0x3E) 	' 0
	table (0x00, 0x42, 0x7F, 0x40, 0x00)	; 1
	table (0x72, 0x49, 0x49, 0x49, 0x46)
	table (0x21, 0x41, 0x49, 0x4D, 0x33)
	table (0x18, 0x14, 0x12, 0x7F, 0x10)
	table (0x27, 0x45, 0x45, 0x45, 0x39)
	table (0x3C, 0x4A, 0x49, 0x49, 0x31)
	table (0x41, 0x21, 0x11, 0x09, 0x07)
	table (0x36, 0x49, 0x49, 0x49, 0x36)
	table (0x46, 0x49, 0x49, 0x29, 0x1E)
	table (0x00, 0x00, 0x14, 0x00, 0x00)
	table (0x00, 0x40, 0x34, 0x00, 0x00)
	table (0x00, 0x08, 0x14, 0x22, 0x41)
	table (0x14, 0x14, 0x14, 0x14, 0x14)
	table (0x00, 0x41, 0x22, 0x14, 0x08)
	table (0x02, 0x01, 0x59, 0x09, 0x06)
	table (0x3E, 0x41, 0x5D, 0x59, 0x4E)
	table (0x7C, 0x12, 0x11, 0x12, 0x7C)
	table (0x7F, 0x49, 0x49, 0x49, 0x36)
	table (0x3E, 0x41, 0x41, 0x41, 0x22)
	table  (0x7F, 0x41, 0x41, 0x41, 0x3E)
	table  (0x7F, 0x49, 0x49, 0x49, 0x41)
	table  (0x7F, 0x09, 0x09, 0x09, 0x01)
	table  (0x3E, 0x41, 0x41, 0x51, 0x73)
	table  (0x7F, 0x08, 0x08, 0x08, 0x7F)
	table  (0x00, 0x41, 0x7F, 0x41, 0x00)
	table  (0x20, 0x40, 0x41, 0x3F, 0x01)
	table  (0x7F, 0x08, 0x14, 0x22, 0x41)
	table  (0x7F, 0x40, 0x40, 0x40, 0x40)
	table  (0x7F, 0x02, 0x1C, 0x02, 0x7F)
	table  (0x7F, 0x04, 0x08, 0x10, 0x7F)
	table  (0x3E, 0x41, 0x41, 0x41, 0x3E)
	table  (0x7F, 0x09, 0x09, 0x09, 0x06)
	table  (0x3E, 0x41, 0x51, 0x21, 0x5E)
	table  (0x7F, 0x09, 0x19, 0x29, 0x46)
	table  (0x26, 0x49, 0x49, 0x49, 0x32)
	table  (0x03, 0x01, 0x7F, 0x01, 0x03)
	table  (0x3F, 0x40, 0x40, 0x40, 0x3F)
	table  (0x1F, 0x20, 0x40, 0x20, 0x1F)
	table  (0x3F, 0x40, 0x38, 0x40, 0x3F)
	table  (0x63, 0x14, 0x08, 0x14, 0x63)
	table  (0x03, 0x04, 0x78, 0x04, 0x03)
	table  (0x61, 0x59, 0x49, 0x4D, 0x43)	; Z
	

DISPLAY_FONT:
gosub cleardisplay
eeprom 25, (SSD1306_COLUMNADDR)
eeprom 26, (0)		;   			;Column start address (0 = reset)
eeprom 27, (127)	 				;Column end address (127 = reset)
eeprom 28, (SSD1306_PAGEADDR)
eeprom 29, (0) 					;Page start address (0 = reset)
eeprom 30, (7) 					;Page end address
	
for index = 25 TO 30
	read index,aByte
	hi2cout (0,abyte)
next

Writei2c (0x40, 	0x00, 0x07, 0x00, 0x07, 0x00)
Writei2c (0x40,	0x14, 0x7F, 0x14, 0x7F, 0x14)
Writei2c (0x40,	0x24, 0x2A, 0x7F, 0x2A, 0x12)
Writei2c (0x40,	0x23, 0x13, 0x08, 0x64, 0x62)
Writei2c (0x40,	0x36, 0x49, 0x56, 0x20, 0x50)
Writei2c (0x40,	0x00, 0x08, 0x07, 0x03, 0x00)
Writei2c (0x40,	0x00, 0x1C, 0x22, 0x41, 0x00)
Writei2c (0x40,	0x00, 0x41, 0x22, 0x1C, 0x00)
Writei2c (0x40,	0x2A, 0x1C, 0x7F, 0x1C, 0x2A)
Writei2c (0x40,	0x08, 0x08, 0x3E, 0x08, 0x08)
Writei2c (0x40,	0x00, 0x80, 0x70, 0x30, 0x00)
Writei2c (0x40,	0x08, 0x08, 0x08, 0x08, 0x08)
Writei2c (0x40,	0x00, 0x00, 0x60, 0x60, 0x00)
Writei2c (0x40,	0x20, 0x10, 0x08, 0x04, 0x02)
Writei2c (0x40,	0x3E, 0x51, 0x49, 0x45, 0x3E)


Writei2c (0x40,	0x00, 0x42, 0x7F, 0x40, 0x00)			; 00
Writei2c (0x40,	0x72, 0x49, 0x49, 0x49, 0x46)
Writei2c (0x40,	0x21, 0x41, 0x49, 0x4D, 0x33)
Writei2c (0x40,	0x18, 0x14, 0x12, 0x7F, 0x10)
Writei2c (0x40,	0x27, 0x45, 0x45, 0x45, 0x39)
Writei2c (0x40,	0x3C, 0x4A, 0x49, 0x49, 0x31)
Writei2c (0x40,	0x41, 0x21, 0x11, 0x09, 0x07)
Writei2c (0x40,	0x36, 0x49, 0x49, 0x49, 0x36)
	Writei2c (0x40,	0x46, 0x49, 0x49, 0x29, 0x1E)
	Writei2c (0x40,	0x00, 0x00, 0x14, 0x00, 0x00)
	Writei2c (0x40,	0x00, 0x40, 0x34, 0x00, 0x00)
	Writei2c (0x40,	0x00, 0x08, 0x14, 0x22, 0x41)
	Writei2c (0x40,	0x14, 0x14, 0x14, 0x14, 0x14)
	Writei2c (0x40,	0x00, 0x41, 0x22, 0x14, 0x08)
	Writei2c (0x40,	0x02, 0x01, 0x59, 0x09, 0x06)
	Writei2c (0x40,	0x3E, 0x41, 0x5D, 0x59, 0x4E)
	Writei2c (0x40,	0x7C, 0x12, 0x11, 0x12, 0x7C)
	Writei2c (0x40,	0x7F, 0x49, 0x49, 0x49, 0x36)
	Writei2c (0x40,	0x3E, 0x41, 0x41, 0x41, 0x22)
	Writei2c (0x40,	0x7F, 0x41, 0x41, 0x41, 0x3E)
	Writei2c (0x40,	0x7F, 0x49, 0x49, 0x49, 0x41)
	Writei2c (0x40,	0x7F, 0x09, 0x09, 0x09, 0x01)
	Writei2c (0x40,	0x3E, 0x41, 0x41, 0x51, 0x73)
	Writei2c (0x40,	0x7F, 0x08, 0x08, 0x08, 0x7F)
	Writei2c (0x40,	0x00, 0x41, 0x7F, 0x41, 0x00)
	Writei2c (0x40,	0x20, 0x40, 0x41, 0x3F, 0x01)
	Writei2c (0x40,	0x7F, 0x08, 0x14, 0x22, 0x41)
	Writei2c (0x40,	0x7F, 0x40, 0x40, 0x40, 0x40)
	Writei2c (0x40,	0x7F, 0x02, 0x1C, 0x02, 0x7F)
	Writei2c (0x40,	0x7F, 0x04, 0x08, 0x10, 0x7F)
	Writei2c (0x40,	0x3E, 0x41, 0x41, 0x41, 0x3E)
	Writei2c (0x40,	0x7F, 0x09, 0x09, 0x09, 0x06)
	Writei2c (0x40,	0x3E, 0x41, 0x51, 0x21, 0x5E)
	Writei2c (0x40,	0x7F, 0x09, 0x19, 0x29, 0x46)
	Writei2c (0x40,	0x26, 0x49, 0x49, 0x49, 0x32)
	Writei2c (0x40,	0x03, 0x01, 0x7F, 0x01, 0x03)
	Writei2c (0x40,	0x3F, 0x40, 0x40, 0x40, 0x3F)
	Writei2c (0x40,	0x1F, 0x20, 0x40, 0x20, 0x1F)
	Writei2c (0x40,	0x3F, 0x40, 0x38, 0x40, 0x3F)
	Writei2c (0x40,	0x63, 0x14, 0x08, 0x14, 0x63)
	Writei2c (0x40,	0x03, 0x04, 0x78, 0x04, 0x03)
	Writei2c (0x40,	0x61, 0x59, 0x49, 0x4D, 0x43)			; Z
	
	
	Writei2c (0x40,	0x00, 0x7F, 0x41, 0x41, 0x41)
	Writei2c (0x40,	0x02, 0x04, 0x08, 0x10, 0x20)
	Writei2c (0x40,	0x00, 0x41, 0x41, 0x41, 0x7F)
	Writei2c (0x40,	0x04, 0x02, 0x01, 0x02, 0x04)
	Writei2c (0x40,	0x40, 0x40, 0x40, 0x40, 0x40)
	Writei2c (0x40,	0x00, 0x03, 0x07, 0x08, 0x00)
	Writei2c (0x40,	0x20, 0x54, 0x54, 0x78, 0x40)
	Writei2c (0x40,	0x7F, 0x28, 0x44, 0x44, 0x38)
	Writei2c (0x40,	0x38, 0x44, 0x44, 0x44, 0x28)
	Writei2c (0x40,	0x38, 0x44, 0x44, 0x28, 0x7F)
	Writei2c (0x40,	0x38, 0x54, 0x54, 0x54, 0x18)
	Writei2c (0x40,	0x00, 0x08, 0x7E, 0x09, 0x02)
	Writei2c (0x40,	0x18, 0xA4, 0xA4, 0x9C, 0x78)
	Writei2c (0x40,	0x7F, 0x08, 0x04, 0x04, 0x78)
	Writei2c (0x40,	0x00, 0x44, 0x7D, 0x40, 0x00)
	Writei2c (0x40,	0x20, 0x40, 0x40, 0x3D, 0x00)
	Writei2c (0x40,	0x7F, 0x10, 0x28, 0x44, 0x00)
	Writei2c (0x40,	0x00, 0x41, 0x7F, 0x40, 0x00)
	Writei2c (0x40,	0x7C, 0x04, 0x78, 0x04, 0x78)
	Writei2c (0x40,	0x7C, 0x08, 0x04, 0x04, 0x78)
	Writei2c (0x40,	0x38, 0x44, 0x44, 0x44, 0x38)
	Writei2c (0x40,	0xFC, 0x18, 0x24, 0x24, 0x18)
	Writei2c (0x40,	0x18, 0x24, 0x24, 0x18, 0xFC)
	Writei2c (0x40,	0x7C, 0x08, 0x04, 0x04, 0x08)
	Writei2c (0x40,	0x48, 0x54, 0x54, 0x54, 0x24)
	Writei2c (0x40,	0x04, 0x04, 0x3F, 0x44, 0x24)
	Writei2c (0x40,	0x3C, 0x40, 0x40, 0x20, 0x7C)
	Writei2c (0x40,	0x1C, 0x20, 0x40, 0x20, 0x1C)
	Writei2c (0x40,	0x3C, 0x40, 0x30, 0x40, 0x3C)
	Writei2c (0x40,	0x44, 0x28, 0x10, 0x28, 0x44)
	Writei2c (0x40,	0x4C, 0x90, 0x90, 0x90, 0x7C)
	Writei2c (0x40,	0x44, 0x64, 0x54, 0x4C, 0x44)
	Writei2c (0x40,	0x00, 0x08, 0x36, 0x41, 0x00)
	Writei2c (0x40,	0x00, 0x00, 0x77, 0x00, 0x00)
	Writei2c (0x40,	0x00, 0x41, 0x36, 0x08, 0x00)
	Writei2c (0x40,	0x02, 0x01, 0x02, 0x04, 0x02)
	Writei2c (0x40,	0x3C, 0x26, 0x23, 0x26, 0x3C)
	Writei2c (0x40,	0x1E, 0xA1, 0xA1, 0x61, 0x12)
	Writei2c (0x40,	0x3A, 0x40, 0x40, 0x20, 0x7A)
	Writei2c (0x40,	0x38, 0x54, 0x54, 0x55, 0x59)
	Writei2c (0x40,	0x21, 0x55, 0x55, 0x79, 0x41)	  
  return

DisplayChar:
let temp = abyte - " "
if temp< 8 then
	if temp=0 then
	 	writei2c(0x40, 0x00, 0x00, 0x00, 0x00, 0x00)		' space
	elseif temp=1 then
		writei2c(0x40, 0x00, 0x00, 0x5F, 0x00, 0x00)		' !
	elseif temp=2 then
	 	writei2c(0x40, 0x00, 0x07, 0x00, 0x07, 0x00) 		' "
	elseif temp=3 then
	 	writei2c(0x40, 0x14, 0x7F, 0x14, 0x7F, 0x14) 		' #
	elseif temp=4 then
	 	writei2c(0x40, 0x24, 0x2A, 0x7F, 0x2A, 0x12) 		' $
	elseif temp=5 then 
	 	writei2c(0x40, 0x23, 0x13, 0x08, 0x64, 0x62) 		' %
	elseif temp=6 then
	 	writei2c(0x40, 0x36, 0x49, 0x56, 0x20, 0x50) 		' &
	elseif temp=7 then 
		writei2c(0x40, 0x00, 0x08, 0x07, 0x03, 0x00) 		' '
	endif
return
endif
temp = temp - 8
temp = temp * 5		
b55 = temp + 4
for b54 = temp to b55
	readtable b54, aByte
	hi2cout (0x40,abyte)
next b54
return	
DisplayNum:
;Words are always 5 chars long, but may be zero led.
b52= 1
for b53 = 0 to 4         
	temp = 4-b53
	aByte = DispNum DIG temp + "0"
	if aByte="0" and b52=1 then 
		goto DisplayNumCont ;Don't show leading spaces
	elseif abyte<>"0" and b52=1 then
	b52=0
	endif
	GOSUB DisplayChar
DisplayNumCont:
next b53
return 
;----- demo code -----
;
;let row = 3
;let col = 10
;gosub setposition
;	
;	
;eeprom 31, ("0123456789 TEST")
;eeprom 46, ("HELLO WORLD")
;for index = 31 TO 45
;	read index,aByte
;	gosub displayChar;
;next index
;	
;let row = 5
;let col = 2
;gosub setposition
;	
;for index = 46 to 56
;	read index,aByte
;	gosub displayChar;
;next index
;	
;let DispNum = 32016		' Display any word sized number.
;let row = 6
;let col = 8
;gosub setposition
;gosub displayNum
;	
;	
;	
;let row = 1			' Display in top yellow section.
;let col = 1
;gosub setposition
;	
;eeprom 57, ("HIGH TEMP - ")
;for index = 57 to 68
;	read index,aByte
;	gosub displayChar;
;next index
;	
;	
;DispNum = 180		
;	
;gosub displayNum
;	
;let abyte = "C"
;gosub displayChar
 
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