/// <summary>
/// 从设备读取命令返回结果
/// </summary>
/// <returns>从设备读取到的返回字符串</returns>
private Int32 _Device_Read_Bytes(byte[] buf, Int32 count)
{
Int32 retCount = 0;
ClassVisa.viRead(g_i32VisaIO, buf, count, out retCount);
return(retCount);
}
/// <summary>
/// 设置串口的波特率
/// </summary>
/// <param name="baud">
/// 串口波特率，
/// </param>
/// <returns>
/// 返回值：0，配置成功，负数，配置失败
/// </returns>
public int ASLSetBAUD(int baud)
{
int state;
state = ClassVisa.viSetAttribute(g_i32VisaIO, ClassVisa.VI_ATTR_ASRL_BAUD, baud);
return(state);
}
/// <summary>
/// 设置串口的timeOut时间
/// </summary>
/// <param name="T_timeOut">
/// timeout的时间ms
/// </param>
/// <returns>
/// 返回值：0，配置成功，负数，配置失败
/// </returns>
public int ASLSetTimerOut(int T_timeOut)
{
int state;
state = ClassVisa.viSetAttribute(g_i32VisaIO, ClassVisa.VI_ATTR_TMO_VALUE, T_timeOut);
return(state);
}
/// <summary>
/// 从设备读取命令返回结果
/// </summary>
/// <returns>从设备读取到的返回字符串</returns>
private string _Device_Read(int Len = 1024)
{
string strReturn = ""; //返回值参数并初始化
try
{
byte[] temp = new byte[Len]; //buffer
int Error = ClassVisa.viScanf(g_i32VisaIO, "%t", temp);
if (Error < 0)
{
return(strReturn);
}
strReturn = Encoding.ASCII.GetString(temp); //将接收到的字节数组内容转化成为字符串
//remove '\n'
if (strReturn.IndexOf('\n') != -1)
{
strReturn = strReturn.Substring(0, strReturn.IndexOf('\n'));
}
}
catch (Exception err)
{
//统一错误处理 error handling
}
return(strReturn);
}
/// <summary>
/// 配置串口通信的数据位数
/// </summary>
/// <param name="stopbits">
/// ClassVisa.VI_ASRL_STOP_ONE - 10 - 1 stop bit is used per frame,
/// ClassVisa.VI_ASRL_STOP_ONE5 - 15 - 1.5 stop bits are used per frame,
/// ClassVisa.VI_ASRL_STOP_TWO - 20 - 2 stop bits are used per frame.
/// </param>
/// <returns>
/// 返回值：0，配置成功，负数，配置失败
/// </returns>
public int ASLSetSTOPBITS(int stopbits)
{
int state;
state = ClassVisa.viSetAttribute(g_i32VisaIO, ClassVisa.VI_ATTR_ASRL_STOP_BITS, stopbits);
return(state);
}
/// <summary>
/// 配置串口通信的数据位数
/// </summary>
/// <param name="databits">
/// 串行通信数据位数，取值范围：5-8
/// </param>
/// <returns>
/// 返回值：0，配置成功，负数，配置失败
/// </returns>
public int ASLSeDATAtBITS(int databits)
{
int state;
state = ClassVisa.viSetAttribute(g_i32VisaIO, ClassVisa.VI_ATTR_ASRL_DATA_BITS, databits);
return(state);
}
/// <summary>
/// 配置串口的奇偶校验位
/// </summary>
/// <param name="parity">
/// 输入变量：奇偶校验类型
/// ClassVisa.VI_ASRL_PAR_NONE - 0 - No parity bit exists,
/// ClassVisa.VI_ASRL_PAR_ODD - 1 - Odd parity should be used,
/// ClassVisa.VI_ASRL_PAR_EVEN - 2 - Even parity should be used,
/// ClassVisa.VI_ASRL_PAR_MARK - 3 - MARK Parity bit exists and is always 1,
/// ClassVisa.VI_ASRL_PAR_SPACE - 4 - SPACE Parity bit exists and is always 0.
/// </param>
/// <returns>
/// 返回值：0，配置成功，负数，配置失败
/// </returns>
public int ASLSetPARITY(int parity)
{
int state;
state = ClassVisa.viSetAttribute(g_i32VisaIO, ClassVisa.VI_ATTR_ASRL_PARITY, parity);
return(state);
}
/********************************************* 私有方法 *********************************************/
/// <summary>
/// 根据地址信息打开设备
/// </summary>
/// <param name="strAddr">设备地址字符串</param>
/// <param name="TimeOut_ms">超时时间</param>
/// <returns>错误码</returns>
private int _Device_Open(string strAddr, int TimeOut_ms)
{
try
{
ClassVisa.viClose(g_i32VisaIO);
//根据地址信息打开设备
ClassVisa.viOpen(ClassVisa.g_i32RsrcManager, strAddr, 0, TimeOut_ms, ref g_i32VisaIO);
}
catch (Exception err)
{
//统一错误处理 error handling
}
return(0);
}
/// <summary>
/// 向设备写入数据
/// </summary>
/// <param name="Cmd">命令字符串</param>
/// <returns>错误码</returns>
private int _Device_Write_Bytes(byte[] buf, Int32 count)
{
Int32 retCount = 0;
try
{
return(ClassVisa.viWrite(g_i32VisaIO, buf, count, retCount)); //向visa接口发送命令符
}
catch (Exception err)
{
//统一错误处理 error handling
}
return(retCount);
}
/// <summary>
/// 向设备写入命令字符串
/// </summary>
/// <param name="Cmd">命令字符串</param>
/// <returns>错误码</returns>
private int _Device_Write(string Cmd)
{
try
{
string strCmd = Cmd; //命令字符串
return(ClassVisa.viVPrintf(g_i32VisaIO, strCmd, 0)); //向visa接口发送命令符
}
catch (Exception err)
{
//统一错误处理 error handling
}
return(0);
}
/// <summary>
/// 关闭当前打开的设备
/// </summary>
/// <returns>错误码</returns>
private int _Device_Close()
{
return(ClassVisa.viClose(g_i32VisaIO));
}