Bit field manipulation for peripheral registers in Code Composer Studio for MSP430.

Good afternoon,

I am trying to implement bit field manipulation for P8OUT peripheral register (address 0x0263) in Code Composer Studio for MSP430F5438A, just like IAR does, but it results in a "undefined first referece" linking error.

I created the following line on hand on the linking command file:

    P8OUT_bit               : origin = 0x0263, length = 0x0001

And in the C-source code:

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extern volatile struct     {      

unsigned char P8OUT0          : 1;       unsigned char P8OUT1          : 1;       unsigned char P8OUT2          : 1;       unsigned char P8OUT3          : 1;       unsigned char P8OUT4          : 1;       unsigned char P8OUT5          : 1;       unsigned char P8OUT6          : 1;       unsigned char P8OUT7          : 1;    

} P8OUT_bit;

#define DB0 P8OUT_bit.P8OUT3

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Adding DB0=0; or DB0=1; in the application code results in the linking error that has been mentioned above.

Any information will be of great value. I thank you very much in advance.

Best regards, Rafael Wagner.

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