// NOTE: Interrupt 1 is offset by 16 to account for internal interrupts
#define MCAN_INTR1 38 

HwiP_Params                    hwiPrms;
static HwiP_Object       gMcanHwiObject;

HwiP_Params_init(&hwiPrms);
hwiPrms.intNum      = MCAN_INTR1; 
hwiPrms.callback    = &MCAN_Intr1ISR; // Define your own ISR
status              = HwiP_construct(&gMcanHwiObject, &hwiPrms);
DebugP_assert(status == SystemP_SUCCESS);