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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Runtime.InteropServices;
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namespace USB2XXX
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{
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class USB2UART
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{
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//定义函数返回错误代码
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public const Int32 UART_SUCCESS = (0); //函数执行成功
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public const Int32 UART_ERR_NOT_SUPPORT = (-1); //适配器不支持该函数
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public const Int32 UART_ERR_USB_WRITE_FAIL = (-2); //USB写数据失败
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public const Int32 UART_ERR_USB_READ_FAIL = (-3); //USB读数据失败
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public const Int32 UART_ERR_CMD_FAIL = (-4); //命令执行失败
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//数据位宽
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public const Byte UART_WORD_LENGTH_8BIT = 0;
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public const Byte UART_WORD_LENGTH_9BIT = 1;
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//停止位
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public const Byte UART_STOP_BITS_1 = 0;
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public const Byte UART_STOP_BITS_05 = 1;
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public const Byte UART_STOP_BITS_2 = 2;
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public const Byte UART_STOP_BITS_15 = 3;
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//奇偶校验位
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public const Byte UART_PARITY_NO = 0;
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public const Byte UART_PARITY_EVEN = 4;
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public const Byte UART_PARITY_ODD = 6;
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//TE控制信号输出
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public const Byte UART_TE_DISEN = 0x00;
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public const Byte UART_TE_EN_LOW = 0x80;
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public const Byte UART_TE_EN_HIGH = 0x81;
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//定义初始化UART初始化数据类型
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public struct UART_CONFIG
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{
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public UInt32 BaudRate; //波特率
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public Byte WordLength; //数据位宽，0-8bit,1-9bit
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public Byte StopBits; //停止位宽，0-1bit,1-0.5bit,2-2bit,3-1.5bit
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public Byte Parity; //奇偶校验，0-No,4-Even,6-Odd
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public Byte TEPolarity; //TE输出控制，0x80-输出TE信号，且低电平有效，0x81-输出TE信号，且高电平有效，0x00不输出TE信号
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}
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[DllImport("USB2XXX.dll")]
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public static extern Int32 UART_Init(Int32 DevHandle, Byte Channel, ref UART_CONFIG pConfig);
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[DllImport("USB2XXX.dll")]
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public static extern Int32 UART_WriteBytes(Int32 DevHandle,Byte Channel,Byte[] pWriteData,Int32 DataSize);
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[DllImport("USB2XXX.dll")]
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public static extern Int32 UART_WriteBytesAsync(Int32 DevHandle,Byte Channel,Byte[] pWriteData,Int32 DataSize);
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[DllImport("USB2XXX.dll")]
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public static extern Int32 UART_ReadBytes(Int32 DevHandle, Byte Channel, Byte[] pReadData, Int32 TimeOutMs);
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}
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}
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