Hi all.
I'm trying to implement printf retargeting in my project, based on STM8S105 microcontroller.
I'm using IAR (3.10 & 2.20) and I'm utilizing printf retargeting example from ST. The problem is, if I try to compile the project with "Discard unused publics" option enabled, it stops working.
When I enable "Discard unused publics" option, I don't see any errors or warnings. I even decided to load original example from ST, and got the same results: with "Discard unused publics" option enabled retargeting stops working.
Can anyone give an Idea, what can cause such a problem?
Part of code, related to retargeting:
#ifdef _RAISONANCE_
#define PUTCHAR_PROTOTYPE int putchar (char c)
#define GETCHAR_PROTOTYPE int getchar (void)
#elif defined (_COSMIC_)
#define PUTCHAR_PROTOTYPE char putchar (char c)
#define GETCHAR_PROTOTYPE char getchar (void)
#else /* _IAR_ */
#define PUTCHAR_PROTOTYPE int extern putchar (int c)
#define GETCHAR_PROTOTYPE int getchar (void)
#endif /* _RAISONANCE_ */
/**
* @brief Retargets the C library printf function to the UART.
* @param c Character to send
* @retval char Character sent
*/
PUTCHAR_PROTOTYPE
{
/* Write a character to the UART */
UART2_SendData8(c);
/* Loop until the end of transmission */
while (UART2_GetFlagStatus(UART2_FLAG_TXE) == RESET);
return (c);
}
/**
* @brief Retargets the C library scanf function to the USART.
* @param None
* @retval char Character to Read
*/
GETCHAR_PROTOTYPE
{
#ifdef _COSMIC_
char c = 0;
#else
int c = 0;
#endif
/* Loop until the Read data register flag is SET */
while (UART2_GetFlagStatus(UART2_FLAG_RXNE) == RESET);
c = UART2_ReceiveData8();
return (c);
}
