初次使用stm32的串口，参照网上找到的f1的例程改了改用在f4上。可是从超级终端上看就是没有收到数据。是我配置的有问题么？用的是usart3，配置文件如下：
void USART_RCC_Configuration(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
}
void USART_GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource8, GPIO_AF_USART3);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource9, GPIO_AF_USART3);
}
void USART_Configuration(void)
{
USART_InitTypeDef USART_InitStruct;
USART_RCC_Configuration();
USART_InitStruct.USART_BaudRate = 115200;
USART_InitStruct.USART_StopBits = USART_StopBits_1;
USART_InitStruct.USART_WordLength = USART_WordLength_8b;
USART_InitStruct.USART_Parity = USART_Parity_No;
USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStruct.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
USART_Init(USART3, &USART_InitStruct);
USART_ITConfig(USART3,USART_IT_RXNE,ENABLE);
USART_Cmd(USART3, ENABLE);
USART_GPIO_Configuration();
}
主程序：
int main(void)
{
SystemInit();
USART_Configuration();
printf("x0c");printf("x0c");
printf("33[1;40;32m");
printf("
*******************************************************************************");
printf("
************************ Copyright 2009-2012, ViewTool ************************");
printf("
*************************** http://www.viewtool.com ***************************");
printf("
***************************** All Rights Reserved *****************************");
printf("
*******************************************************************************");
printf("
");
while(1)
{
if(USART_GetFlagStatus(USART3, USART_IT_RXNE) != RESET)
{
printf("%c",USART_ReceiveData(USART3));
}
}
}
还请各位指导！ |
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