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Can't I Assigned An Address Casting To A Sfr? See Example

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What is wrong with this ....

 

 

#include <pic16F685.h>

 

#define BANK_0 0x0000

 

#define IOPORTC ((unsigned volatile *)(BANK_0 + PORTC))

#define IOTRISC ((unsigned volatile *)(BANK_0 + TRISC))

 

 

.. later on in a function definition ...

 

*IOTRISC &= ~SEGMENT_MASK; // By writing zero's to the bits that correspond to segments, we set them all to outputs

 

This generates a non descriptive error (general error).

 

The code is included as an attachment.

 

Thanks for the help...

7segment.zip

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Please don't use volatile and use intermediate temporary. Something like:

 

#define IOTRISB ((unsigned*)(BANK_0 + TRISB))

...

unsigned *tris = IOTRISB;
*tris &= ~SEGMENT_MASK;

 

 

Regards,

Pavel

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