本帖最后由 lsy3500 于 2017-1-5 14:02 编辑

各位大大好，有个问题，我用的是stm32f103c8t6，从网上下载了一个 stm32f103c8t6 使用 USART1 串口打印测试程序（重定向printf函数），检查参数设置无误后编译通过，下载到板子上以后，串口调试助手却怎么也没反应，难道是硬件的问题？只是硬件问题一般比较少见，所以先跪求各位大大帮我看看软件是不是还有什么问题。这是我下载的部分主要程序，附件是源代码，跪求各位大大帮我看看非常感谢：
[mw_shl_code=c,true]int main(void)
{
/* 系统时钟设置为 72M */
SystemInit();

/* USART1 config 115200 8-N-1 */
USART1_Config();

printf(" *********This is a printf demo******** ");

printf(" * This is a USART1_printf demo * ");

USART1_printf(USART1, " * -------------------- * ");

USART1_printf(USART1, " * STM32F103C8T6 Development Board * ");
USART1_printf(USART1, " * ----------------------------------- * ");
USART1_printf(USART1, "   --------------------------------------- ");        

while (1)
{
;
}
}[/mw_shl_code]

[mw_shl_code=c,true]void USART1_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

/* config USART1 clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

/* USART1 GPIO config */
/* Configure USART1 Tx (PA.09) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;        //íÆíìêä3ö
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART1 Rx (PA.10) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;        //¸¡¿Õêäèë
GPIO_Init(GPIOA, &GPIO_InitStructure);

/* USART1 mode config */
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
[/mw_shl_code]