stm030_measur/SYSTEM/Uart1.c

#include "uart1.h"

uint8_t TxBufferUart[256] = { 0 };
uint8_t RxBufferUart[256] = { 0 };
__IO uint8_t TxCounterUart = 0x00;
__IO uint8_t RxCounterUart = 0x00;
uint8_t UartSendCount = 0;
bool IsUart1Rcv = false;

/*******************************************************************************
* Function Name  : USART_Configuration
* Description    : Configure USART1
* Input          : None
* Output         : None
* Return         : None
* Attention		 : None
*******************************************************************************/
void GpioConfig_Usart1 ( void )
{
#if WIFI_Uart1_def
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    //使能USART1/GPIO 时钟可配置
    //时钟配置
    RCC_AHBPeriphClockCmd ( RCC_AHBPeriph_GPIOA, ENABLE );
    RCC_APB2PeriphClockCmd ( RCC_APB2Periph_USART1, ENABLE );

    /*
    *  USART1_TX -> PA9 , USART1_RX ->	PA10
    */
    GPIO_PinAFConfig ( Wifi_GPIO, GPIO_PinSource9, GPIO_AF_1 );
    GPIO_PinAFConfig ( Wifi_GPIO, GPIO_PinSource10, GPIO_AF_1 );

    GPIO_InitStructure.GPIO_Pin = Wifi_Tx | Wifi_Rx;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
    GPIO_Init ( Wifi_GPIO, &GPIO_InitStructure );

    USART_InitStructure.USART_BaudRate = Wifi_UART_BAUD;
    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 ( Wifi_UART, &USART_InitStructure );

    USART_OverrunDetectionConfig ( USART1, USART_OVRDetection_Disable ); //使能前，关闭溢出
    USART_ClearFlag ( Wifi_UART, USART_FLAG_TC );
    USART_ITConfig ( Wifi_UART, USART_IT_RXNE, ENABLE );
    USART_ITConfig ( Wifi_UART, USART_IT_TXE, DISABLE );
    USART_Cmd ( Wifi_UART, ENABLE );     //使能串口

    NVIC_InitStructure.NVIC_IRQChannel = Wifi_NVIC_Interrupt;
    NVIC_InitStructure.NVIC_IRQChannelPriority = Wifi_NVIC_Pre;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init ( &NVIC_InitStructure );	    //使能串口中断

#endif
}

void UartSend ( char *buffer, int nBytes )
{
    // Wait for previous xmt to complete
    while ( TxCounterUart < UartSendCount );

    // Setup next XMT
    memcpy ( TxBufferUart, buffer, nBytes );
    TxCounterUart = 0;
    UartSendCount = nBytes;

    USART_ITConfig ( USART1, USART_IT_TXE, ENABLE );
}

void USART1_IRQHandler ( void )
{
    if ( USART_GetITStatus ( Wifi_UART, USART_IT_RXNE ) != RESET )
    {
        RxBufferUart[RxCounterUart] = USART_ReceiveData ( Wifi_UART );

        if ( RxCounterUart >= 2 )	 //当前是\n,上个如果是\r
        {
            if ( ( RxBufferUart[RxCounterUart - 1] == 0x0D ) && ( RxBufferUart[RxCounterUart] == 0x0A ) ) //start字符个数
            {
                IsUart1Rcv = true;
            }
        }

        RxCounterUart++;
        USART_ClearITPendingBit ( Wifi_UART, USART_IT_RXNE );
    }


    if ( USART_GetITStatus ( Wifi_UART, USART_IT_TXE ) != RESET )
    {
        USART_SendData ( Wifi_UART, TxBufferUart[TxCounterUart++] );

        if ( TxCounterUart >= UartSendCount )
        {
            USART_ITConfig ( Wifi_UART, USART_IT_TXE, DISABLE );
        }

        USART_ClearITPendingBit ( Wifi_UART, USART_IT_TXE );
    }


}