STLINK下载异常

tree1214 提问时间：2021-1-15 09:10 /

问答
是否解决:

大家好，我现在碰到的情况如下：我用的MCU是STM32F030C8T6,我一直用STLINK下载仿真调试，昨天晚上因为调试串口，移植别人的程序(部分代码如下):

void UART2_Init()
{

NVIC_InitTypeDef NVIC_InitStructure;
//USART1 interrupt Config
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

  GPIO_PinAFConfig(GPIOA, GPIO_PinSource14, GPIO_AF_1);
  GPIO_PinAFConfig(GPIOA, GPIO_PinSource15, GPIO_AF_1);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15| GPIO_Pin_14;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2 , ENABLE);

  USART2_InitStructure.USART_BaudRate = 115200;
  USART2_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART2_InitStructure.USART_StopBits = USART_StopBits_1;
  USART2_InitStructure.USART_Parity = USART_Parity_No;
  USART2_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART2_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART2,&USART2_InitStructure);
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
USART_Cmd(USART2,ENABLE);
}

由于14引脚是STLINK的时钟线，因为移植程序时候没有修改相应引脚位置(串口引脚应该是PA2,PA3)直接编译下载程序，导致这块板子程序不能再次下载，我测过另外板子下载多是正常的，本人怀疑是对14引脚的配置造成的，望大侠指导一下，能让这块板子起死回生，谢谢。