run placement fails for object "ECanaMboxes"

Vennela Yadhati said:

Hi,

Apart from defining the bits, I wanted to define another struct variable in MDL and MDH regs. Here's what I need:

struct CANMDH_Variable {  //bits description

 

Uint16 A:8;                                       //32:39

Uint16    B:16;                                   //55:40

Uint16    C:8;                                    //63:56

};

 

union CANMDH_REG {

   Uint32                  all;

   struct CANMDH_WORDS     word;

   struct CANMDH_BYTES     byte;

   struct CANMDH_BITS   bit;

   struct CANMDH_Variable    variable;

};

 

This is strange, it should work but it is looking like the code is thinking variable is greater than 32-bits wide.  This means it is attempting to assign a larger set of registers to a fixed memory range and hence the error.  Doing some experimenting, lead me to a possible cause: the line: Uint16 B:16;

The fix:

struct CANMDH_Variable {  //bits description

Uint32 A:8;                                       //32:39
Uint32   B:16;                                   //55:40
Uint32    C:8;                                    //63:56

};

Changing to Uint32 made it compile for me.  Hopefully it does for you.

Tim

Hi,

I've used this approach and YES, the Uint32 way seems to work. However, here's something else that is interesting. My bits are not allocated in a gradual (0-31 or 31-0). But in the way as shown below:

struct CANMDL_Variable { //bit description

Uint32 A:8;  //31:24

Uint32 B:16;                        //23:8 

Uint32 C:6;                                      //5:0

Uint32 D:1;                             //6

Uint32 E:1;                             //7 

};