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TWIN-CAN and dave

Fuchs Leonhard

Hello,
I used DAVE to get the basic setup for the twin-can module of an XC161.

In the suggested code I found some "funny" lines

#define CAN_TXIPNDL          (*((uword volatile far *) 0x200288))
#define CAN_TXIPNDL_TXIPND0  ((T_Reg16 *) 0x200288)->bit0

if(CAN_TXIPNDL & CAN_TXIPNDL_TXIPND0)   // message object 0 transmit interrupt
{
}

I thought CAN_TXIPNDL_TXIPND0 is already a bit variable. IMHO the boolean expression is nonsense. The following expression should give me the same result:

if(CAN_TXIPNDL_TXIPND0)
{
}

Just to be shure, am I right or not?

Leo

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