void USART1_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
RCC_AHB1PeriphClockCmd(Open_USART_TX_GPIO_CLK,ENABLE);
RCC_AHB1PeriphClockCmd(Open_USART_RX_GPIO_CLK,ENABLE);//RCC_APB2PeriphClockCmd
RCC_APB2PeriphClockCmd(Open_USART_CLK,ENABLE); //??usart?±????????RCC_APB2PeriphClockCmd
GPIO_PinAFConfig(Open_USART_TX_GPIO_PORT, Open_USART_TX_SOURCE, Open_USART_TX_AF);
GPIO_PinAFConfig(Open_USART_RX_GPIO_PORT, Open_USART_RX_SOURCE, Open_USART_RX_AF);
/*
* Open_USART_TX -> PA9 , Open_USART_RX -PA10
*/
GPIO_InitStructure.GPIO_Pin = Open_USART_TX_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(Open_USART_TX_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = Open_USART_RX_PIN;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;//GPIO_Mode_IN_FLOATING
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(Open_USART_RX_GPIO_PORT, &GPIO_InitStructure);
/*
USARTx configured as follow:
- BaudRate = 115200 baud
- Word Length = 8 Bits
- One Stop Bit
- No parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit
*/
USART_InitStructure.USART_BaudRate = 9600;
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_ClockInitStructure.USART_Clock = USART_Clock_Disable;
USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;*/
USART_ClockInit(USART1, &USART_ClockInitStructure);
// USART_Init(USART1, &USART_InitStructure);
USART_Init(USART1, &USART_InitStructure);
/* Enable the Open_USART Transmit interrupt: this interrupt is generated when the
Open_USART transmit data register is empty */
USART_ITConfig(USART1,USART_IT_RXNE,ENABLE); //usart1??????????
USART_Cmd(USART1, ENABLE);
}
void USART1_NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable the USARTx Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = Open_USART_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void USART1_INIT(void)
{
USART1_Configuration();
USART1_NVIC_Config();
BSP_IntVectSet(BSP_INT_ID_USART1, usart1_test); //??×????¨???????? BSP_IntHandlerUSART1
BSP_IntPrioSet(BSP_INT_ID_USART1,1);
BSP_IntEn(BSP_INT_ID_USART1); //????????
}
uint16_t Uart1_Get_Data;
uint8_t aa[2]={0x34,0x35};
void usart1_test(void)
{
//uint16_t pdata = 0x13;
//uint16_t bb=0;
BSP_LED_Toggle(3);
if(USART_GetITStatus(USART1,USART_IT_RXNE)==SET)
{
Uart1_Get_Data=USART_ReceiveData(USART1);
USART_ClearITPendingBit(USART1,USART_IT_RXNE);
USART_SendData(USART1,0x48);
// Uart1_Get_Flag=1;
}
if(USART_GetITStatus(USART1,USART_IT_TXE)!= RESET)
{
USART_ClearITPendingBit(USART1,USART_IT_TXE);
USART_SendData(USART1,aa[0]); //????
while(USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET); {}
}
////
//????-????·??ú?????è??????SR,????DR?????÷ ?ò??????????????????????
if(USART_GetFlagStatus(USART1,USART_FLAG_ORE)==SET)
{
USART_ClearFlag(USART1,USART_FLAG_ORE); //??SR
USART_ReceiveData(USART1); //??DR
}
}
哎网上找了些资料不是很全，自己总结了下usart的使用希望对大家有用