代码添加了如下两部分:
#ifdef __GNUC__
/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
set to 'Yes') calls __io_putchar() */
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
PUTCHAR_PROTOTYPE
{
USART_SendData_8bit(DEBUG_USARTx, (uint8_t)ch);
while (USART_GetFlagStatus(DEBUG_USARTx, USART_FLAG_TXE) == RESET);
return ch;
}
然后调用printf函数,编译OK,进入DEBUG模式,点击RUN按钮不能运行。把printf函数屏蔽就能运行,不知是什么问题? |