CCS/TMS320F28069: Shift count is too large

文國林

Prodigy 80 points

Part Number: TMS320F28069

Tool/software: Code Composer Studio

I plan to use CAN mailbox17 to send data.

For my codes, the complier warning me: shift count is too large for the statement (1 << 17), see the figure below

Will it hurt my project and how to fix it?

over 7 years ago

0 Richard Poley over 7 years ago

TI__Mastermind 27200 points

Yes, it will.

The compiler treats the '1' as a 16-bit integer, so a left shift of 17 will always result in 0. You need to typecast it to a long so the result makes sense:

ECanaShadow.CANTRS.all = ((Uint32) 1 << 17);

Regards,

Richard

0 Pierre Bouchet1 over 7 years ago

Expert 2595 points

Hi,

The warning should go away if you replace the 1 by an Uint32 literal:

ECanaShadow.CANTRS.all |= (1UL << 17);

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CCS/TMS320F28069: Shift count is too large