16x1 display strange/unreadable characters

[hugoxp1]

Hi,

I'm using a 20x2 PICAXE and a 16x1 display (VHC16100) (removed from a samsung fax machine) and i put it to work with this code:

#No_Table



EEPROM 0,("hello")



	gosub init


main:


	b1=1
	gosub wrins
	
	pause 1000
	
	b1=10
	gosub wrins
	
	pause 2000
	
	
	b1=14
	gosub wrins
	
	pause 500
	
	
	for b3=0 to 4
	
		
		[B]read b3,b1[/B]
	
						
		gosub wrchr
		
		pause 500
			
	next
	

	
	pause 5000
	
	
	b1=1
	gosub wrins
	
	
	pause 2500
	


goto main




init: 
	let pinsB = 0 ' Clear all output lines
	let b4 = 0 ' Reset variable b3
	let dirsB = 252 ' Set pins 2-7 as output lines (Stamp only).
	pause 200 ' Wait 200 ms for LCD to reset.
	let pinsB = 48 ' Set to 8-bit operation.
	pulsout 3,1 ' Send data by pulsing 'enable’
	pause 10 ' Wait 10 ms
	pulsout 3,1 ' Send data again
	pulsout 3,1 ' Send data again
	let pinsB = 32 ' Set to 4-bit operation.
	pulsout 3,1 ' Send data.
	pulsout 3,1 ' Send data again.
	let pinsB = 128 ' Set to two line operation
	pulsout 3,1 ' Send data.
	let b1 = 14 ' Screen on, cursor on instruction
	gosub wrins ' Write instruction to LCD
	return
	
	
wrchr: 
	let pinsB = b1 & 240 ' Mask the high nibble of b1 into b2.
	high 2 ' Make sure RS is high
	pulsout 3,1 ' Pulse the enable pin to send data.
	let b2 = b1 * 16 ' Put low nibble of b1 into b2.
	let pinsB = b2 & 240 ' Mask the high nibble of b2
	high 2 ' Make sure RS is high
	pulsout 3,1 ' Pulse enable pin to send data.
	return
	
	
wrins: 
	let pinsB = b1 & 240 ' Mask the high nibble of b1 into b2.
	pulsout 3,1 ' Pulse the enable pin to send data.
	let b2 = b1 * 16 ' Put low nibble of b1 into b2.
	let pinsB = b2 & 240 ' Mask the high nibble of b2
	pulsout 3,1 ' Pulse enable pin to send data.
	high 2 ' Back to character mode
	return

the display show five strange/unreadable characters

but if i change the bold line above to:

(...)

b1="A"

(...)

then what i see displayed is: "AAAAA"... and that's correct!

so, what can i do to read (properly) the values stored by EEPROM?

thank you

 

[hippy]

#No_Table has an implicit #No_Data with it. Remove that and things should improve.

#no_table
Do not download table or EEPROM data (X1 and X2 parts only).

Page 7, PICAXE Manual 2.

 

[hugoxp1]

#No_Table has an implicit #No_Data with it. Remove that and things should improve.

#no_table
Do not download table or EEPROM data (X1 and X2 parts only).

Page 7, PICAXE Manual 2.

You are absolutely right! It worked!

Thank you very much