;CRC=???? - hex file

Carlos Q · Joined: 10 Dec 2009 Posts: 5

Hi!!!

I would like to know how CCS calculates the ;CRC=???? located at the end of the Hex files.
For example:

:10FFC00014FF37000E6DEC00FFFE3700247D0200A9
:10FFD00000000000050037000108A80030C8B30089
:10FFE00016E8B700247D0200000000004F047800EE
:0CFFF000CF0378004F037800CF027800A8
:027FFE00000081
:0200000401F009
:10000000120700003F000000338000000F310000A5
:0C0010000F3300000700000003C00000D8
:00000001FF
;DSPIC30F4013
;CRC=B083 CREATED="04-jun-12 13:29"

Thanks a lot for your help!!

Carlos

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

http://www.ccsinfo.com/pdfs/CRC_Source_Code.pdf

Carlos Q · Joined: 10 Dec 2009 Posts: 5

Thanks PCM.

How execute the code? for all bytes in the hex file including line CRC and CR +LF?

On the other hand, what values are for "unsigned char *mess" and "unsigned
long mess_length" parameters?

Carlos

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

I think that's the source code that runs in the CCS compiler when it's
running under Windows (The executable code may be in CCSC.exe
or in some .DLL file). It's not intended that you run it in a PIC. What do
you need it for ?

Carlos Q · Joined: 10 Dec 2009 Posts: 5

Thanks again PCM.

I have a bootloader for dspic30f but I would like to validate the whole .hex file before program the pic. I already validate the CRC of each line but the CRC of whole file is important to me.

In some cases my pic goes crazy and I would like to program these extra validation.

Smile