How do I write macro for any function in C (embedded C)

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I want to write the macro to print my message on the uart terminal.
In my MCU series API

uart_print_user_msg((uint8_t *)"\r\n user mesage");

or

uart_print_user_msg((uint8_t *)buf);

i.e buf is char array pass to the function.
is it possible to write the macro like

#define TM_PRINTF(f_, ...) printf((f_), __VA_ARGS__)
#define TM_SNPRINTF(s_, sz_, f_, ...) snprintf((s_), (sz_), (f_), __VA_ARGS__)

declaration of the function is

void uart_print_user_msg(uint8_t *p_msg)

What I have tried:

what I tried

#define MY_PRINTF(f_, ...) uart_print_user_msg((f_), )

Posted 21-May-21 3:08am

Shadababe04

Updated 22-May-21 7:47am

v2

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Richard MacCutchan 21-May-21 9:36am

What happens in each case?

Shadababe04 21-May-21 9:44am

Hi Richard
void uart_print_user_msg(uint8_t *p_msg) is the function which is used to print the message.I want to write the micro as I gave the example of printf function

Richard MacCutchan 21-May-21 10:26am

Then you should write them and find out whether they work or not. We cannot do it for you.

Rick York 21-May-21 11:30am

While you're at it, you might want to include the cast in the macro.

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KarstenK · Accepted Answer · 2021-05-22T07:47:00

Solution 1

C++

#define MY_PRINTF  uart_print_user_msg

should do the job.

I dont like macros, because of strange errors and debugging huzzle. Avoid them, and use functions. The compiler and linker will produce the same code so the advantages arent so great as you may think.

Posted 22-May-21 7:47am

KarstenK