代码中增加如下代码，编译器GCC和ARM的差异问题
#if 1
#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__ */
/* retarget the C library printf function to the USART */
PUTCHAR_PROTOTYPE
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */
usart_data_transmit(USART1, (uint8_t)ch);
/* Loop until transmit data register is empty */
while(RESET == usart_flag_get(USART1, USART_FLAG_TBE));
return ch;
}
#endif |
