139 lines
4.5 KiB
C
139 lines
4.5 KiB
C
/*
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*********************************************************************************
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头文件
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*********************************************************************************
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*/
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#include "usart3.h"
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/*
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************************************************************************************
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变量定义
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************************************************************************************
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*/
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u8 USART3_RX_BUF[USART3_MAX_RECV_LEN]; //接收缓冲,最大USART3_MAX_RECV_LEN个字节.
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u8 USART3_TX_BUF[USART3_MAX_SEND_LEN]; //发送缓冲,最大USART3_MAX_SEND_LEN字节
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vu16 point1 = 0;
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/*
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*********************************************************************************************************
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* 函 数 名: USART3_Configuration()
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* 功能说明: 串口3配置
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* 输 入 ：波特率baund
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* 输 出 ：无
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*********************************************************************************************************
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*/
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void USART3_Configuration(u32 baund)
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{
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USART_InitTypeDef USART_InitStructure;
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GPIO_InitTypeDef GPIO_InitStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE); //使能USART3
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE); //GPIOB时钟
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//NVIC_Configuration();
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USART_DeInit(USART3); //复位串口1
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//USART3_TX PB.10 PB.11
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_Init(GPIOB, &GPIO_InitStructure);
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GPIO_PinAFConfig(GPIOB, GPIO_PinSource10, GPIO_AF_USART3);
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GPIO_PinAFConfig(GPIOB, GPIO_PinSource11, GPIO_AF_USART3);
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USART_InitStructure.USART_BaudRate = baund;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_Parity = USART_Parity_No;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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USART_Init(USART3,&USART_InitStructure);
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USART_Cmd(USART3,ENABLE);
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USART_ITConfig(USART3,USART_IT_RXNE,ENABLE);//开启USART3的接收中断
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//Usart1 NVIC 配置
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NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;//串口3中断通道
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2;//抢占优先级3
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NVIC_InitStructure.NVIC_IRQChannelSubPriority =0; //子优先级3
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
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NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器、
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USART_ClearFlag(USART3,USART_FLAG_TC); //清除发送完成标志位
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}
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/*
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*********************************************************************************************************
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* 函 数 名: USART3_IRQHandler()
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* 功能说明: 串口3接收中断
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* 输 入 ：全局数组USART1_SDI_RX_BUF[]
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* 输 出 ：无
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*********************************************************************************************************
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*/
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void USART3_IRQHandler(void)
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{
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u8 Res;
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if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)
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{
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Res =USART_ReceiveData(USART3);//(USART1->DR); //读取接收到的数据
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if(Res == 0x24)
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{
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point1 = 0;
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}
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USART3_RX_BUF[point1++] = Res;
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if(USART3_RX_BUF[0] == '$' && USART3_RX_BUF[4] == 'M' && USART3_RX_BUF[5] == 'C') //确定是否收到"GPRMC/GNRMC"这一帧数据
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{
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if(Res == '\n')
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{
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memset(Save_Data.GPS_Buffer, 0, GPS_Buffer_Length); //清空
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memcpy(Save_Data.GPS_Buffer, USART3_RX_BUF, point1); //保存数据
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Save_Data.isGetData = true;
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point1 = 0;
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memset(USART3_RX_BUF, 0, USART3_MAX_RECV_LEN); //清空
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}
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}
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if(point1 >= (USART3_MAX_RECV_LEN-1))
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{
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point1 = 0;
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}
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}
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}
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/*
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*********************************************************************************************************
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* 函 数 名: u3_printf()
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* 功能说明: 串口3输出
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* 输 入 ：
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* 输 出 ：
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*********************************************************************************************************
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*/
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void u3_printf(char* fmt,...)
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{
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u16 i,j;
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va_list ap;
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va_start(ap,fmt);
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vsprintf((char*)USART3_TX_BUF,fmt,ap);
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va_end(ap);
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i=strlen((const char*)USART3_TX_BUF); //此次发送数据的长度
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for(j=0;j<i;j++) //循环发送数据
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{
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while(USART_GetFlagStatus(USART3,USART_FLAG_TC)==RESET); //循环发送,直到发送完毕
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USART_SendData(USART3,USART3_TX_BUF[j]);
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}
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}
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/***************************** END OF FILE *********************************/
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