Displaying a decimal larger than 255 on LCD?

[timmers]

Could it not be as simple as:-

COUNTER VAR WORD
COUNTER_H VAR COUNTER.BYTE1 'high byte
COUNTER_L VAR COUNTER.BYTE0 'low byte

LCDOUT $FE,128,DEC4 COUNTER 'top row, position 1.

Tim.

[Chris Barron]

Could it not be as simple as:-

COUNTER VAR WORD
COUNTER_H VAR COUNTER.BYTE1 'high byte
COUNTER_L VAR COUNTER.BYTE0 'low byte

LCDOUT $FE,128,DEC4 COUNTER 'top row, position 1.

Tim.

I don't think so, because although the LCDOUT is very simple and elegant, the maximum number which can be stored in either Counter_H or Counter_L is 255. Therefore the largest value which the word sized variable Counter can be is 255255.

There needs to be a conversion first. The high byte needs to be multiplied by 256 (not 255 as I originally pointed out) and then added to the low byte before it gets stored in the word 'Counter'

[timmers]

Indeed you are right.

Without knowing the exact task, I just wanted to keep it simple...

[djmachine]

I need to be able to count to around 2000 without rolling over so 2 bytes would be plenty. I tried the code you posted.. but it still rolled over at 255. hmmm....

[Chris Barron]

I need to be able to count to around 2000 without rolling over so 2 bytes would be plenty. I tried the code you posted.. but it still rolled over at 255. hmmm....

It still rolls at 255 ? Did yoiu declare the destination variable as a word or a byte ?

Ever count of 1 of the lower byte equates to 1 in the destination variable, and every count of 1 in the high byte equates to 256 in the destination variable.

2000, in this scheme, consists of highbyte = 7, low byte = 208

As you can see, you need to multiply whatever is in the highbyte by 256. In this case 256*7 = 1792. Then add the lowbyte directly, and 1792 + 208 = 2000

[Acetronics2]

Could it not be as simple as:-

COUNTER VAR WORD
COUNTER_H VAR COUNTER.BYTE1 'high byte
COUNTER_L VAR COUNTER.BYTE0 'low byte

LCDOUT $FE,128,DEC4 COUNTER 'top row, position 1.

Tim.

Hi, You were not so far ...

COUNTER VAR WORD

COUNTER.Highbyte = EEPROM_READ1    'high byte ( note: EEPROM_READ1 or value1, or ...xxx1)
COUNTER.Lowbyte = EEPROM_READ2     'low byte

LCDOUT $FE,128,DEC4 COUNTER    'top row, position 1.

No multiplying necessary ...

Alain