/* Place your implementation of fputc here */
/* e.g. write a character to the USART */
USART_SendData(DEBUG_USART, (uint8_t) ch);
/* Loop until the end of transmission */
while (USART_GetFlagStatus(DEBUG_USART, USART_FLAG_TC) == RESET)
{}
有做第二条语句吗
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