Can i use this line in CCS C compiler.

[a]

Can i use this line in CCS C compiler.
==============================
unsigned char Key_Schedule[16][48];
==============================
This line is must use in DES Algorithm.
Compiler warning
How i use it? Or i Can't.

[Felix Althaus]

Hello

I think it should be possible if yo use a PIC which has 16*48 = 768 bytes of ROM empty for the array.

What warning do you get?

Felix

[Guest]

Compiler warning.
Not enough RAM for all variables.

[mpfj]

I don't see why not. Are you claiming that we get an error message ? If so, what ?

Of course, your choice of PIC may be of influence !! You're creating an array that contains 768 bytes of data, and (a) not all PICs have that much RAM and (b) I don't think all PICs support large tables.

[Ttelmah]

[Guest]

Sorry for my fault post. because i rectify this line from
unsigned char Key_Schedule[16][48];
to
unsigned char Key_Schedule[128];
I'am so Sorry For my fault.
Compiler Show :
===============================================
Error[45] C:\Micropro\SourceCode_Picc\DES.c 7 : Subscript out of range
===============================================
And how i solve my problem. Please tell me.

Below is all my sourcecode that i test.
===============================================

#include "C:\Micropro\SourceCode_Picc\DES.h"

#include<string.h>
#define DES_ENCRYPT 1
#define DES_DNCRYPT 0

unsigned char Key_Schedule[16][48]; <--This line i am fault post; Sorry

//static const unsigned char LS[17]={1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};

//unsigned char PC1[56]={57,49,41,33,25,17,9,1,58,50,42,34,26,18,10,2,59,51,43,35,27,19,11,3,60,52,44,36,63,55,47,39,31,23,15,7,62,54,46,38,30,22,14,6,61,53,45,37,29,21,13,5,28,20,12,4};


void main()
{

setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_spi(FALSE);
setup_counters(RTCC_INTERNAL,RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);

while(1)
{
delay_ms(100);
}

}
===============================================

[Guest]

Now i change from Pic16f877 to Pic18f458 in my sourcecode everything is OK. But if i want use it int Pic16f877. Can i do it . Because i will write this sourcecode in SmartCard (Silvercard -->Pic16f87+24LC64). Thank you for all post . Please tell me if u have any idea. Or Anyone have sourcecode Des Algorithm or other Encryption/Decryption in C language.
I will use Silvercard (Pic16f877+24LC64).