Acrosser Technology AIV-HM76V0FL Series, Руководство пользователя, Страница: 93 / 107

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”);
6.
Syntax:
i32 setCanMask(struct CanMask mask)
Description:
This function gets the current setting of the acceptance masks.
Masks are used to determine which bits in the ID field of the CAN packet are
examined with the filters. There are two acceptance masks (mask0 and mask1)
and six acceptance filters (filter0 ~ filter5) in the CAN Bus subsystem. Filter0 ~
filter1 are associated with mask0. Filter2 ~ filter4 are associated with mask1.
Here is the Mask/Filter truth table:
Mask bit
n
Filter bit
n
Message
ID bit n
Accept or reject bit
n
0 x x Accept
1 0 0 Accept
1 0 1 Reject
1 1 0 Reject
1 1 1 Accept
Note: x = don’t care
Parameters:
This parameter ‘mask’ is a pointer to a variable of type ‘CanMask’.
Users use the field ‘maskId’ to indicate the mask they want and the API put
the setting of the mask in the ‘mask’ field.
struct CanMask {
u8 maskId; // 0 or 1
u32 mask;
}
Return Value: If this function sets the mask setting successfully, it returns 0,
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