com.cxx

此软件是云台控制软件

#include"COM.hxx"


int speed_arr[] = {B38400, B19200, B9600, B4800, B2400, B1200, B300,
B38400, B19200, B9600, B4800, B2400, B1200, B300,};
int name_arr[] = { 38400, 19200, 9600, 4800, 2400, 1200, 300,
38400, 19200, 9600, 4800, 2400, 1200, 300,};

CCOM::CCOM()
{
}

CCOM::~CCOM()
{
    CloseCOM();
}
void CCOM::OpenCOM()
{
    /*以读写方式打开串口*/
    fd = open( "/dev/ttyAMA1", O_RDWR);
    printf("open COM,fd=%d\n",fd);
    if (-1 == fd)
    { 
        /* 不能打开串口一*/ 
        printf(" 打开串口错误!\n");
    }
}

void CCOM::set_speed(int speed)
{
    int   i;
    int   status;
    struct termios Opt;
    int ra = tcgetattr(fd, &Opt);
    if(-1 == ra)
    {
        printf("tcgetattr()return %d\n",ra);
    }
    for ( i= 0;  i < sizeof(speed_arr) / sizeof(int);  i++)
    {
        if  (speed == name_arr[i])
        {
            int rb = tcflush(fd, TCIOFLUSH);
            if(-1 == rb)
            {
                printf("tcflush()return %d\n",rb);
            }
            int rc = cfsetispeed(&Opt, speed_arr[i]);
            if(-1 == rc)
            {
                printf("cfsetispeed() return %d\n",rc);
            }
            int rd = cfsetospeed(&Opt, speed_arr[i]);
            if(-1 == rd)
            {
                printf("cfsetospeed() return %d\n",rd);
            }
            status = tcsetattr(fd, TCSANOW, &Opt);
            if  (status != 0)
            {
                printf("tcsetattr fd1\n");
                return;
            }
            tcflush(fd,TCIOFLUSH);
        }
    }
    printf("set speed %d\n",speed);
}

/**

*@brief   设置串口数据位，停止位和效验位

*@param  fd     类型  int  打开的串口文件句柄

*@param  databits 类型  int 数据位   取值 为 7 或者8

*@param  stopbits 类型  int 停止位   取值为 1 或者2

*@param  parity  类型  int  效验类型 取值为N,E,O,S

*/

bool CCOM::set_Parity(int databits,int stopbits,int parity)

{ 
    struct termios options; 
    if(tcgetattr(fd,&options) != 0)
    { 
        printf("SetupSerial 1\n");     
        return false;  
    }
    options.c_cflag &= ~CSIZE; 
    switch (databits) /*设置数据位数*/
    {   
        case 7:
            options.c_cflag |= CS7; 
            printf("set databits %d\n",databits);
            break;
        case 8:     
            options.c_cflag |= CS8;
            printf("set databits %d\n",databits);
            break;   
        default:    
            printf("Unsupported data sizen");
            return (false);  
    }
    switch (parity) 
    {   
        case 'n':
        case 'N':    
            options.c_cflag &= ~PARENB;   /* Clear parity enable */
            options.c_iflag &= ~INPCK;     /* Enable parity checking */ 
            break;  
        case 'o':   
        case 'O':     
            options.c_cflag |= (PARODD | PARENB); /* 设置为奇效验*/  
            options.c_iflag |= INPCK;             /* Disnable parity checking */ 
            break;  
        case 'e':  
        case 'E':   
            options.c_cflag |= PARENB;     /* Enable parity */    
            options.c_cflag &= ~PARODD;   /* 转换为偶效验*/     
            options.c_iflag |= INPCK;       /* Disnable parity checking */
            break;
        case 'S': 
        case 's':  /*as no parity*/   
            options.c_cflag &= ~PARENB;
            options.c_cflag &= ~CSTOPB;
            printf("set parity %c\n",parity);
            break;  
        default:   
            printf("Unsupported parity");    
            return (false);   
    }  


    /* 设置停止位*/  

    switch (stopbits)
    {  
        case 1:    
            options.c_cflag &= ~CSTOPB;
            printf("set stopbits %d\n",stopbits);
            break;  
        case 2:    
            options.c_cflag |= CSTOPB;  
            printf("set stopbits %d\n",stopbits);
            break;
        default:    
            printf("Unsupported stopbits!\n");  
            return (false); 
    } 

    /* Set input parity option */ 
    if (parity != 'n')   
    {
        options.c_iflag |= INPCK; 
    }
    tcflush(fd,TCIFLUSH);
    options.c_cc[VTIME] = 150; /* 设置超时15 seconds*/   
    options.c_cc[VMIN] = 0; /* Update the options and do it NOW */
    if (tcsetattr(fd,TCSANOW,&options) != 0)   
    { 
        printf("SetupSerial 3\n");   
        return false;  
    } 
    return (true);  
}

int CCOM::SendData(void*buffer,int Len)
{
    int    nByte;
    if(NULL == buffer)
    {
        return 0;
    }
    nByte = write(fd,buffer,Len);
    printf("%d bytes data sent\n",nByte);
    return nByte;
}   

int CCOM::ReadData(void *buffer,int Len)
{
    if(NULL == buffer)
    {
        return 0;
    }
    int  readByte = read(fd,buffer,Len);
    return readByte;
}

void CCOM::CloseCOM()
{
    if(-1 == close(fd))
    {
        printf(" 关闭串口错误！\n");
    }
}