Hex values to decimal

[gunayburak]

Hello everyone ..

We've got a pic based system that doesn't have an lcd and also which stores some values into EEPROM .. When we are done with collecting the datas into eeprom , we remove the PIC and mount it to the PICKIT3 and export the hex file in order to read the stored EEPROM values on specific addresses on PICKIT3 standalone GUI ... The datas we store into the eeprom are 16 bit values and we use the address $00 to store the lowbyte of the value and $01 for the highbyte ...

Is there a possible way to view this 16 bit data stored in the eeprom in decimal format instead of HEX format ? We need this because each time the user who obtains the datas needs to use a hex to dec converter software to interpret the values and that number converting stuff takes a long time for him ..

I hope I made my point clear ...

Thanks in advance ...

[ardhuru]

Output the data serially on the UART or bit bang it out of a pin?

Why involve a pickit3 at all, for just reading the stored data?

[Acetronics2]

a small board sending data to the PC " Hyperterminal " .... when the chip is placed on a ZIF socket ??? ( see "Debug" PBP command i.e. )

Alain

[gunayburak]

Is there an another way to make it work ? Such as viewing the hex on EXCEL ? or an another software ?

[Scampy]

Have to agree with the others, use serial and either cable or use a HC-05 bluetooth module and read the values or HEX stored via a terminal application, or write your own app using something like VB or Liberty Basic.

You risk damage to the PIC constantly removing it and then re-inserting it into your PCB

[ardhuru]

Of course you can do the conversions in Excel; but again, how would you get the data into Excel in the first place? And if you do that, (using something like StampDaq or some such), then why not let the pic/PBP itself do the conversion(s)?

[gunayburak]

Ok thanks to everyone for the answers ..

[louislouis]

Hi All,
How to convert a HEX value to DEC value. For example: Var mai = $2B and I want to store the decimal value of this (which is 43 in decimal) in other variable.
On LCD is all ok, shows the right dec value, but how to store this in decimal in other variable that's my problem.
I do some search on the forum but no success. Can me to someone explain how to do?

Thanks.



#CONFIG
cfg = _INTRC_OSC_NOCLKOUT
cfg&= _WDT_ON
cfg&= _PWRTE_OFF
cfg&= _MCLRE_OFF
cfg&= _CP_OFF
cfg&= _CPD_OFF
cfg&= _BOD_ON
cfg&= _IESO_ON
cfg&= _FCMEN_ON
__CONFIG cfg
#ENDCONFIG

DEFINE OSC 8 ; Use a 8 MHZ internal clock
OSCCON = %01110000

DEFINE HSER_RCSTA 90h ' Enable serial port & continuous receive
DEFINE HSER_TXSTA 24h ' Enable transmit, BRGH = 1
DEFINE HSER_BAUD 38400
DEFINE HSER_CLROERR 1 ' Clear overflow automatically

Define LCD_DREG PORTC
Define LCD_DBIT 0
Define LCD_RSREG PORTC
define LCD_RSBIT 4
define LCD_EREG PORTC
define LCD_EBIT 5
define LCD_BITS 4
define LCD_LINES 2
define LCD_COMMANDUS 2000
define LCD_DATAUS 50

ANSELH = 0 ; Set RB6 (TX) pin to digital
ANSEL = 0 ; Set all digital
TRISA = %011100 ; Set RA5,RA4,RA3 input ; RA2,RA1,RA0 output
TRISB = %0011 ; Set RB4,RB5 input ; RB6,RB7 output
TRISC = %00000000 ; Set RC0,RC3,RC4,RC5,RC6, RC1,RC2,RC7 output
CM1CON0 = 0 ; Disable comparator 1
CM2CON0 = 0 ; Disable comparator 2
OPTION_REG.7=1 ; Disable weak pull ups

mai var byte[2]
decvalue var byte
Lcdout $fe, 1
pause 1000

main:
hserout ["01 05",13,10]
pauseus 1
HSerin 1000,main, [wait ("41 05"), skip 1, hex mai]

Lcdout $fe, 1
lcdout dec mai

let decvalue = mai

pause 1000

goto main

[richard]

to start with

mai var byte[2]
HSerin 1000,main, [wait ("41 05"), skip 1, hex mai]


probably does not work as you intend

input
41 05xC , mai[0]=$C or 12 or %00001100
41 05x2C , mai[0]=$2C or 44 or %00101100
41 05x42C , mai[0]=$2C or 44 or %00101100
41 05x552C , mai[0]=$2C or 44 or %00101100
41 05x3FED2C , mai[0]=$2C or 44 or %00101100
mai[1] takes no part in this

secondly
the data is always binary once "parsed" by the HEX modifier in hserin ,it just depends on how you display/interpret the data

[louislouis]

to start with


probably does not work as you intend

input
41 05xC , mai[0]=$C or 12 or %00001100
41 05x2C , mai[0]=$2C or 44 or %00101100
41 05x42C , mai[0]=$2C or 44 or %00101100
41 05x552C , mai[0]=$2C or 44 or %00101100
41 05x3FED2C , mai[0]=$2C or 44 or %00101100
mai[1] takes no part in this

secondly
the data is always binary once "parsed" by the HEX modifier in hserin ,it just depends on how you display/interpret the data

Thanks Richard for answer, but still not clear for me. The serin input data is a string like:
41 05 2B The "41 05" part represent the identificator and the "2B" is the value in hex which is changing and this part I want store in variable in dec format.

[HenrikOlsson]

You don't get to choose in what format the number is stored, it doesn't work like that.
2B in hex
43 in decimal
00101011 in binary
+ in ASCII
These are all the same thing and stored exactly the same in a variable.

mai = $2B
mai = %00101011
mai = 43
mai = "+"
Exactly the same result. It's just how we choose to interpret the information.

If you want to receive a number expressed in a "human readable" format (ie represented as an ASCII string) you use the available DEC/HEX/BIN modifiers (as you are).

The code, as it runs, will then interpret ASCII characters and convert to an actual number so that the ASCII string '2B' becomes the decimal value 43. There's no need to use an array in the HSERIN statement because you're not storing the '2' and the 'B', you're storing the decimal value 43 that the ASCII string '2B' represents.

Then, when you do the LCDOUT you, again, use the DEC (or HEX or BIN) modifier to convert the decimal value 43 back into the ASCII characters '4' and '3' which are displayed on the LCD.

Since your LCD shows 43 when you send '41 05 2B' everything is working exactly as expected and when you do decvalue = mai you'll copy the content of mai to decvalue so it TOO contains 43.

I don't get what the problem is......

/Henrik.

[louislouis]

You don't get to choose in what format the number is stored, it doesn't work like that.
2B in hex
43 in decimal
00101011 in binary
+ in ASCII
These are all the same thing and stored exactly the same in a variable.

mai = $2B
mai = %00101011
mai = 43
mai = "+"
Exactly the same result. It's just how we choose to interpret the information.

If you want to receive a number expressed in a "human readable" format (ie represented as an ASCII string) you use the available DEC/HEX/BIN modifiers (as you are).

The code, as it runs, will then interpret ASCII characters and convert to an actual number so that the ASCII string '2B' becomes the decimal value 43. There's no need to use an array in the HSERIN statement because you're not storing the '2' and the 'B', you're storing the decimal value 43 that the ASCII string '2B' represents.

Then, when you do the LCDOUT you, again, use the DEC (or HEX or BIN) modifier to convert the decimal value 43 back into the ASCII characters '4' and '3' which are displayed on the LCD.

Since your LCD shows 43 when you send '41 05 2B' everything is working exactly as expected and when you do decvalue = mai you'll copy the content of mai to decvalue so it TOO contains 43.

I don't get what the problem is......

/Henrik.

Hi Henrik, yes right the LCD shows the value in dec that is what I want, but next in the code I want to do some math or comparsion with decimal value of this number.

[HenrikOlsson]

And what's stopping you?
Either I don't get it or you don't :-) No offense.



mai VAR BYTE
value VAR BYTE

mai = $2B 'assign value to variable, in this case the value 43 represented as HEX.

mai = mai + 10
LCDOUT $FE, 1, DEC mai ' will show 53
PAUSE 2000

value = mai * 4
LCDOUT $FE, 1, DEC value ' will show 212
PAUSE 2000

value = value / 5
LCDOUT $FE, 1, DEC value ' will show 42
PAUSE 2000

IF mai < $3A THEN
LCDOUT $FE, 1, "mai is smaller than 58"
ENDIF
PAUSE 2000

IF mai > value THEN
LCDOUT $FE, 1, "Yes, mai is bigger than value"
ENDIF
PAUSE 2000

LCDOUT $FE, 1, DEC mai, " ", HEX mai
PAUSE 2000

Show us the math or comparison you're wanting to do and tell us wha the problem you're having actually is.

/Henrik.

[louislouis]

ahaaa, I thought that in PBP not work and I don't try this all the time. Now it's
more clear. Thanks guys for the patience with me, I'm just an old beginner (63) and I try to learn about these (new for me) things.