How to save incoming databyte stream on File

[sinaga00]

Hi All,

I really need your help and advise to save the databyte output on file(.dat or csv or .txt). I have canbus data comes from hardware and i develop software to record all output on file.


Below are the code:

int8_t receiveCallback(cb_DataReceivedInfo_t* rcvInfos)
{

if (rcvInfos->status < 0) { /* multipacket transfer aborted */
receiveBufferActive = 0;
return 0;
}


ofstream j1939File("j1939.txt", ios::out);
if (!j1939File)
{
printf("File cant be found");
exit(1);
}







case 61442:
{ int iTransInputShaftSpdraw=0;

for (int i = 0; i < rcvInfos->dataLen; i++)

int iTransInputShaftSpdraw = (rcvInfos->data[7]);

int iTransInputShaftSpd=iTransInputShaftSpdraw*0.125;

int iTransOutputShaftSpdraw = (rcvInfos->data[3]) ;

int iTransOutputShaftSpd = (iTransOutputShaftSpdraw*0.125);

printf("TransInputShaftSpd [SPN161] = %d RPM\n",iTransInputShaftSpd);

printf("TransOutputShaftSpd [SPN161] = %f RPM\n",iTransOutputShaftSpd);

j1939File<< rcvInfos->data <<' '<< endl;

printf("\n");


}

break;





Issue: The file.txt is created, but it was empty (no output captured).

Please kindly help. !




Sinaga00

[coder777]

hello Sinaga00,

What's this -> for (int i = 0; i < rcvInfos->dataLen; i++)? A loop without { }?

What's the type of 'rcvInfos->data'?