UART4模板

#define UART4_Bps 9600

#define UART4_RecSize 20

uchar UART4_RecData[UART4_RecSize];
uchar UART4_Loc;

void UART4_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

//----------GPIO Init----------
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

//UART4_TX
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
//UART4_RX
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOC, &GPIO_InitStructure);

//----------USART Init----------
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4,ENABLE);

USART_InitStructure.USART_BaudRate = UART_Bps;
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(UART4, &USART_InitStructure);

//----------NVIC Init----------
NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x03;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x03;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

//----------Enable----------
USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);
USART_Cmd(UART4, ENABLE);
}

void UART4_SendData(uchar Data)
{
while(USART_GetFlagStatus(UART4,USART_FLAG_TC)!= SET);
USART_SendData(UART4, Data);
}

void UART4_IRQHandler(void)
{
if(USART_GetITStatus(UART4, USART_IT_RXNE) != RESET)
{
UART4_RecData[UART4_Loc++] = USART_ReceiveData(UART4);
}
}