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1、程序实现功能：可以直接接收USART1的数据，并通过串口调试输出显示#includestm32f10x_lib.hvoid NVIC_Configuration(void);void RCC_Configuration(void);void GPIO_Configuration(void);ErrorStatus HSEStartUpStatus;USART_InitTypeDef USART_InitStructure;USART_ClockInitTypeDef USART_ClockInitStructure;int main() #ifdef DEBUG debug #endif RC
2、C_Configuration(); NVIC_Configuration(); GPIO_Configuration();/*串口传输速率的大小必须与RCC所设定的时钟相对应起来*/ USART_InitStructure.USART_BaudRate = 9600; /设置USART的传输速率 /*设定数据的接收发送模式*/ USART_InitStructure.USART_WordLength = USART_WordLength_8b;/在一帧中传输或接受8位数据位 USART_InitStructure.USART_StopBits = USART_StopBits_1; /定义在
3、帧的结尾传输一个停止位 USART_InitStructure.USART_Parity = USART_Parity_No; /奇偶失能 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; /指定硬件流控制模式RTS和CTS使能 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; /指定使能或失能发送和接受模式 Tx发送使能和Rx接收使能 USART_ClockInitStructure.USART_Clock
4、 = USART_Clock_Disable; /提升USART时钟时使能还是失能，钟低电平活动 USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low; /指定SLCK引脚上时钟的极性 USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge; /时钟第二个边缘进行数据捕获 USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable; /在SCLK引脚上输出最后发送的那个数据字的脉冲不从SCLK输出 USART_ClockIn
5、it(USART1, &USART_ClockInitStructure); USART_Init(USART1, &USART_InitStructure);/*输入输出的中断使能*/ USART_ITConfig(USART1, USART_IT_TXE, ENABLE); USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); USART_Cmd(USART1, ENABLE); /启动串口 使能USART1外设 while(1) /* USART_SendData(USART1, 0X26); /发送数据 while(USART_GetFlagSt
6、atus(USART1, USART_FLAG_TXE) = RESET)/等待发送结束 */ void NVIC_Configuration(void) NVIC_InitTypeDef NVIC_InitStructure;#ifdef VETB_TAB_RAM NVYC_SetVectorTable(NVIC_VectTab_RAM,0x0);#else NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0); #endif /* Enable the USART1 Interrupt */ NVIC_InitStructure.NVIC_IRQChan
7、nel = USART1_IRQChannel; /通道设置为串口1中断（故后面应选择在“void USART1_IRQHandler(void)”开中断） NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; /中断占先等级0 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; /中断响应优先级0 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; /打开中断 NVIC_Init(&NVIC_InitStructure);void RCC
8、_Configuration(void) RCC_DeInit(); RCC_HSEConfig(RCC_HSE_ON); HSEStartUpStatus=RCC_WaitForHSEStartUp(); if(HSEStartUpStatus=SUCCESS) FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); FLASH_SetLatency(FLASH_Latency_2); RCC_HCLKConfig(RCC_SYSCLK_Div1); RCC_PCLK2Config(RCC_HCLK_Div1); /串口波特率的确定 RCC
9、_PCLK1Config(RCC_HCLK_Div2); RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); RCC_PLLCmd(ENABLE); while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY=RESET) RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); while(RCC_GetSYSCLKSource()!=0x08) RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOE|RCC_APB2
10、Periph_USART1, ENABLE); /RCC中打开相应的串口 void GPIO_Configuration(void) GPIO_InitTypeDef GPIO_InitStructure; / GPIO_PinRemapConfig(GPIO_Remap_USART1, ENABLE); /改变指定管脚脚的映射 Changes the mapping of the specified pin /* Configure USART1 RTS (PA12) and USART1 Tx (PA9) as alternate function push-pull 根据资料可查得各管脚
11、对应*/ GPIO_InitStructure.GPIO_Pin =GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; /推挽输出 GPIO_Init(GPIOA, &GPIO_InitStructure); /* Configure USART2 CTS (PA11) and USART1 Rx (PA10) as input floating */ GPIO_InitStructure.GPIO_Pin =GPIO_Pin_
12、10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin=GPIO_Pin_1|GPIO_Pin_0|GPIO_Pin_2|GPIO_Pin_3; GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP; GPIO_Init(GPIOE,&GPIO_InitStructure
13、); 中断函数： （可在stm32f10x_.it.c中调用）void USART1_IRQHandler(void) u8 RX_dat; /定义字符变量 if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) /判断发生接收中断 GPIO_WriteBit(GPIOE, GPIO_Pin_1, (BitAction)0x01); /LED M RX_dat=(USART_ReceiveData(USART1) & 0x7F); /接收数据，整理除去前两位 USART_ClearITPendingBit(USART1, USART_IT_RXNE); /清除中断标志 while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) = RESET)/等待接收结束/ USART_ITConfig(USART1, USART_IT_RXNE, DISABLE); /关中断 USART_SendData(USART1,RX_dat); /发送数据 GPIO_WriteBit(GPIOE, GPIO_Pin_2, (BitAction)0x01); /LED M
