Reading Array values into variables

[Tom Gonser]

This is probably easy, but I can't seem to figure it out.

I have an array of 34 bytes collected via Serin2. I can see each of these. What I need to do tho is read several of them and convert them from the hex values they represent now to decimal.

So imagine:

SSMAX(23) contains 83
SSMAX(34) contains 03

These make up a temperature measurement.

I need to reverse these so I get 03 83, then convert these to DECIMAL

03 83 to Decimal should give me 899. There is an implied decimal between the 9's so I'd divide by 10. the result would be 89.9

BUT.. I can't find a way to get the data out of the array to deal with it.

Does anyone have any ideas about this?

I was planning to read each character 0 - 3 - 8 - 3 in sequence via a loop and multiply the 0*4096+3*256+8*16+3*1... But I can't seem to get data ouf of the array..

I can't seem to get the array values into variables to work on them either.

Thanks - this is new stuff for me.

Tom

[Demon]

Did you know the array starts at element 0?

(suggestion from a newb)

Robert

[Demon]

Are you sure you are processing your array in the proper order?

I am also converting, DATAIN VAR BYTE[5] to one byte.

RESULT=DATAIN[0]+(DATAIN[1]*10)+(DATAIN[2]*100)+(DATAIN[3]*1000)+(DATAIN[4]*10000)

I was just about to search for a post. Someone had told me lately how to do the conversion and I was going to doublecheck my formula.

Robert

[mister_e]

SSMAX(23) contains 83
SSMAX(34) contains 03

what about the following

DEFINE BOOTLOADER_USED 1
DEFINE OSC 20

    ' Lcd defines
    ' ===========
    '
    define LCD_DREG PORTB     ' Set data pin of LCD to
    define LCD_DBIT 0         ' PORTB.0-PORTB.3

    define LCD_RSREG PORTB    ' Set RS bit of LCD to
    define LCD_RSBIT 4        ' PORTB.4

    define LCD_EREG PORTB     ' Set E bit of LCD to
    define LCD_EBIT 5         ' PORTB.5

    DEFINE LCD_LINES 4        ' 4 Lines LCD
    define LCD_COMMANDUS 2000 ' Command delay time in uSec
    DEFINE LCD_DATAUS 100      ' Data delay time in uSec

WholeDecimalNumber var word
SSD4        var byte
SSD3        var byte
SSD2        var byte
SSD1        var byte
SSMAX       var byte [80]
MSB         var byte
LSB         var byte


ssmax[34]=$03
SSmax[23]=$83
SSD4= (ssmax[34]>>4)
SSD3= (ssmax[34] & $f) 
SSD2= (ssmax[23]>>4)
SSD1= (ssmax[23] & $f) 

WholeDecimalNumber=(ssd4*4096)+(ssd3*256)+(ssd2*16)+ssd1

lcdout $fe,1,"myval=",#wholedecimalnumber dig 3,_
       #wholedecimalnumber dig 2,#wholedecimalnumber dig 1,_
       ".",dec1 wholedecimalnumber

here: goto here

[Tom Gonser]

The 4th post includes this:

SSD4= (ssmax[34]>>4)
SSD3= (ssmax[34] & $f)
SSD2= (ssmax[23]>>4)
SSD1= (ssmax[23] & $f)

It appears that somehow this is reading the digits out of the bytes, but I have never seen the notation before.

>>

& $f

Do these somehow mean first digit and second digit?

TG

[mister_e]

>>4 => shift byte 4 position to the right. so you keep only the 4 high bits
& $F => Bitwise and with hex F. so you keep only the 4 low bits

everything is in the PBP manual section 4.17