CC2530: Macro concatenation with "=" does not create a valid token

Arturo Arenas

Prodigy 100 points

Part Number: CC2530

Hello,

I'm using the IAR Workbench and I just wanna know how to avoid the below warning:

Warning[Pe1665]: concatenation with "=" in macro "MCU_IO_OUTPUT_PREP" does not create a valid token

In the follow code:

#define MCU_IO_OUTPUT_PREP(port, pin, val) st( P##port##SEL &= ~BM(pin); \
P##port##_##pin## = val; \
P##port##DIR |= BM(pin); )

the definition of "st()" is:

#define st(x) do { x } while (__LINE__ == -1)

Please any help,

Best regards and thanks a lot for your help

over 5 years ago

0 George Mock over 5 years ago

TI__Guru**** 232900 points

I'm pretty sure you need to remove the ## between pin and =. So the second statement is ...

P##port##_##pin = val;

To be certain, I need to see how you invoke MCU_IO_OUTPUT_PREP, and I need to know what that invocation is intended to expand to.

Thanks and regards,

-George

0 Arturo Arenas over 5 years ago in reply to George Mock

Prodigy 100 points

Thanks a lot George, that was the trouble!

0 Arturo Arenas over 5 years ago in reply to George Mock

Prodigy 100 points

Dear George,

First i defined:

#define HAL_RTS_SET() MCU_IO_SET_HIGH(HAL_BOARD_IO_UART_RTS_PORT,HAL_BOARD_IO_UART_RTS_PIN)

then

#define MCU_IO_SET_HIGH(port, pin) MCU_IO_SET_HIGH_PREP(port, pin)

for last

#define MCU_IO_SET_HIGH_PREP(port, pin) st( P##port##_##pin## = 1; )

but removing the ## between pin and = i can fix the warning!

best regards and thanks a lot.

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CC2530: Macro concatenation with "=" does not create a valid token