ADLINK PCI-7841/cPCI-7841 - Manual (Page 37)

Function Reference 29
un-send message would be stored in the
memory of the driver. The sequence of out-
going message is the FIRST-IN-FIRST-
OUT. According this algorithm, if your pro-
gram need to send an emergency data, you
can clear the transmit buffer and send it
again.
See Also CanRcvMsg()
Usage C/C++
#include “pci7841.h
int handle = CanOpenDriver(0, 0);//open the port
0 of card 0
….
CanClearTxBuffer(handle);
CanCloseDriver(handle);
CanGetErrorCode()
Purpose Get the Error Code
Prototype C/C++
BYTE CanGetErrorCode(int handle)
Parameters
handle : handle retrieve from CanOpen-
Driver()
Return Value error code
Return error code is an 8-bit data
Bit Symbol Name Value Function
7 ERRC1 Error Code 1
6 ERRC0 Error Code 0
5 DIR Direction
1 Rx error occurred during reception
0 Tx error occurred during ransmission
4 SEG4 Segment 4
3 SEG3 Segment 3
2 SEG2 Segment 2
1 SEG1 Segment 1
0 SEG0 Segment 0