Thread: can't understand error message.

it is for embedded smart card system..

i'm using smartdeck c compiler..

well i did some mistake at the declaration part but i have correct it this is te example for the declaration :

Code:

typedef struct message
{
	unsigned char msg_asal[6];
	unsigned char msg2[2];
	unsigned char check[4];
	unsigned long sum;
} apdu_data3;

#pragma melpublic
//unsigned char publicData[136];
union
{
                apdu_data pData;
	apdu_data2 pData2;
	apdu_data3 msg;
                unsigned char pEncdata[16];
	unsigned char pkeysat[CLkeysat-1];
	unsigned int pKira1[1];
	unsigned int pKira2[1];
 } apdu_group1;

and this is the line where i implement the checksum library :

Code:

memcpy(apdu_group1.msg.msg2, apdu_group1.msg.msg_asal, 2);
memcpy(apdu_group1.msg.check, apdu_group1.msg.msg_asal+2, 4);

CHECKSUM(2, apdu_group1.msg.msg2, apdu_group1.msg.sum);     //line 157

> found 'unsigned long', expected 'unsigned long *'
Like I said, you should have done

Code:

CHECKSUM(2, apdu_group1.msg.msg2, &apdu_group1.msg.sum);

Do you have any other example which works?
Have you tried this with variables which are not in a union?