CODEWITHSUNDEEP
cpointers
user2819759
user2819759

Reputation: 95

How to pass function pointer as arguments?

I have two function definitions

void USART_puts(USART_TypeDef* USARTx, volatile char *s)
{
 .....
}


void send_packet(char op, unsigned char *data, unsigned char len) 
{
....
}

now I have created a function pointer for send_packet(char,unsigned char*,unsigned char) as

void (*send_packet)(char,unsigned char*,unsigned char);

I want to pass this function pointer like this

 USART_Puts(USART1,send_packet)

But I am getting an error " argument of type send_packet * is incompatible with type volatile char * " I can understand from the error that two arguments are not matching. But can anyone please tell me how can I pass this function pointer?

Upvotes: 1

Views: 1002

Answers (1)

Potatoswatter
Potatoswatter

Reputation: 137770

USART_Puts needs to have a parameter of function pointer type.

void USART_puts(USART_TypeDef* USARTx, void (*s)(char,unsigned char*,unsigned char))

The definition of send_packet as a pointer after its definition as a function is unnecessary. Two such declarations of the same name should not even coexist.

Upvotes: 1

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