Acrosser AIV-HM76V1FL - Manual (Page 52)

AIV-HM76V1FL Series User Manual
52 Acrosser Technology Co., Ltd.
Syntax: i32 sendCanMessage(struct CanMsg *buffer, u8 count)
Description: This function sends out CAN packages over the CAN bus.
Parameters: If there is more than one CAN packet to send, these CAN
packages are stored in an array of type ‘CanMsg’. This
function sends out packets in a sequential fashion. The
memory address of the first CAN packet to be sent is
pointed at by the parameter ‘buffer’. The number of CAN
packets to be sent is indicated by the parameter ‘count’.
Return Value: If this function sends the CAN packet successfully, it
returns 0, any other returned value stands for error.
Here is an example:
If the CAN packets in the array ‘canAry[]’ have been
initialized. The code listed below will send out the CAN
packets in the ‘canAry[]’ over the CAN bus.
unsigned int result = 0;
struct CanMsg canAry[30];
/* …
Initialize the CAN packages in the canAry[30]
*/
result = sendCanMessages( canAry, 30 );
if( result != 0)
fprintf( stderr, “Send CAN package error!\n”);
Syntax: i32 getCanMessage(struct CanMsg *buffer, u8 count)
Description: This function receives CAN packets from the CAN bus
subsystem.
Parameters: This function stores received CAN packages sequentially
at an array of type ‘CanMsg’. The number of packages to
receive is indicated by the parameter ‘count’.
Return Value: If this function receives the CAN packet successfully, it
returns 0, any other returned value stands for error.
Here is an example:
If the array ‘canAry[]’ of type ‘CanMsg’ has been declared
and allocated. The code listed below will receive 30 CAN
packages from the CAN bus subsystem and stores the
packages in the ‘canAry[]’.
unsigned int result = 0;
struct CanMsg canAry[30];
result = getCanMessage( canAry, 30 );
if( result != 0)
fprintf( stderr, “Fail to receive CAN packets!\n”);