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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 USB2ADS1256
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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 ADS1256_SUCCESS = (0); //函数执行成功
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public const Int32 ADS1256_ERR_NOT_SUPPORT = (-1); //适配器不支持该函数
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public const Int32 ADS1256_ERR_USB_WRITE_FAIL = (-2); //USB写数据失败
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public const Int32 ADS1256_ERR_USB_READ_FAIL = (-3); //USB读数据失败
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public const Int32 ADS1256_ERR_CMD_FAIL = (-4); //命令执行失败
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public const Int32 ADS1256_ERR_CH_NO_INIT = (-5); //该通道未初始化
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//定义ADS采样率
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public const Byte ADS1256_DRATE_30000SPS = 0xF0;
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public const Byte ADS1256_DRATE_15000SPS = 0xE0;
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public const Byte ADS1256_DRATE_7500SPS = 0xD0;
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public const Byte ADS1256_DRATE_3750SPS = 0xC0;
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public const Byte ADS1256_DRATE_2000SPS = 0xB0;
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public const Byte ADS1256_DRATE_1000SPS = 0xA1;
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public const Byte ADS1256_DRATE_500SPS = 0x92;
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public const Byte ADS1256_DRATE_100SPS = 0x82;
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public const Byte ADS1256_DRATE_60SPS = 0x72;
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public const Byte ADS1256_DRATE_50SPS = 0x63;
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public const Byte ADS1256_DRATE_30SPS = 0x53;
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public const Byte ADS1256_DRATE_25SPS = 0x43;
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public const Byte ADS1256_DRATE_15SPS = 0x33;
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public const Byte ADS1256_DRATE_10SPS = 0x23;
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public const Byte ADS1256_DRATE_5SPS = 0x13;
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public const Byte ADS1256_DRATE_2_5SPS = 0x03;
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//定义初始化ADS1256的数据类型
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public struct ADS1256_CONFIG
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{
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UInt16 SampleRate; //采样率
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Byte PGA; //内部增益，2^n
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Byte BufferEn; //1：使能Buffer,0：禁止Buffer
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UInt32 SampleMode; //两个bit控制一个通道，00：不使用该通道，01：该通道为单端模式，10：该通道为差分负极，11：该通道为差分正极
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}
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/**
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* @brief 初始化配置ADS1256
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* @param DevHandle 设备句柄
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* @param Channel 需要配置的ADS通道号，取值0或者1
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* @param pConfig ADS1256配置参数指针
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* @retval 函数执行状态，小于0函数执行出错
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*/
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[DllImport("USB2XXX.dll")]
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public static extern Int32 ADS1256_Init(Int32 DevHandle,Byte Channel,ref ADS1256_CONFIG pConfig);
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/**
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* @brief 启动ADS转换，调用该函数后，适配器会自动读取ADS转换数据
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* @param DevHandle 设备句柄
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* @param Channel 需要启动的ADS通道号，取值0或者1
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* @retval 函数执行状态，小于0函数执行出错
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*/
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[DllImport("USB2XXX.dll")]
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public static extern Int32 ADS1256_Start(Int32 DevHandle,Byte Channel);
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/**
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* @brief 启动ADC连续转换模式
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* @param DevHandle 设备句柄
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* @param Channel 需要读取数据的ADS通道号，取值0或者1
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* @param pData 数据存储缓冲区首地址
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* @retval 函数执行状态，小于0函数执行出错，大于0为实际采集到的ADC数据
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*/
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[DllImport("USB2XXX.dll")]
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public static extern Int32 ADS1256_Read(Int32 DevHandle,Byte Channel,Int32[] pData);
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/**
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* @brief 停止ADS转换，调用该函数后，适配器会自动停止ADS转换数据
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* @param DevHandle 设备句柄
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* @param Channel 需要启动的ADS通道号，取值0或者1
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* @retval 函数执行状态，小于0函数执行出错
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*/
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[DllImport("USB2XXX.dll")]
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public static extern Int32 ADS1256_Stop(Int32 DevHandle,Byte Channel);
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}
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}
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