使用python来调用CAN通讯的DLL实现方法_python实现can通信

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使用使用python来调用来调用CAN通讯的通讯的DLL实现方法实现方法

今天小编就为大家分享一篇使用python来调用CAN通讯的DLL实现方法，具有很好的参考价值，希望对大家有所帮助。一起跟随小编过

来看看吧

由于工作上的需要，经常要与USBCAN打交道，但厂家一般不会提供PYTHON的例子，于是自己摸索地写一个例子出来，以便在工作上随时可以使用

PYTHON来测试CAN的功能。这里的例子是使用珠海创芯科技有限公司的USBCAN接口卡，他们提供一个ControlCAN.dll，也提供了一个.h文件，如

下：

#ifndef CONTROLCAN_H

#define CONTROLCAN_H

////文件版本：v2.00 20150920

//#include <cvidef.h> //使用CVI平台开发，请使用该语句。

//接口卡类型定义

#define VCI_USBCAN1 3

#define VCI_USBCAN2 4

#define VCI_USBCAN2A 4

#define VCI_USBCAN_E_U 20

#define VCI_USBCAN_2E_U 21

//函数调用返回状态值

#define STATUS_OK 1

#define STATUS_ERR 0

/*------------------------------------------------兼容ZLG的函数及数据类型------------------------------------------------*/

//1.ZLGCAN系列接口卡信息的数据类型。

typedef struct _VCI_BOARD_INFO{

unsigned short hw_Version;

unsigned short fw_Version;

unsigned short dr_Version;

unsigned short in_Version;

unsigned short irq_Num;

unsigned char can_Num;

char str_Serial_Num[20];

char str_hw_Type[40];

unsigned short Reserved[4];

} VCI_BOARD_INFO,*PVCI_BOARD_INFO;

//2.定义CAN信息帧的数据类型。

typedef struct _VCI_CAN_OBJ{

unsigned int ID;

unsigned int TimeStamp;

unsigned char TimeFlag;

unsigned char SendType;

unsigned char RemoteFlag;//是否是远程帧

unsigned char ExternFlag;//是否是扩展帧

unsigned char DataLen;

unsigned char Data[8];

unsigned char Reserved[3];

}VCI_CAN_OBJ,*PVCI_CAN_OBJ;

//3.定义初始化CAN的数据类型

typedef struct _VCI_INIT_CONFIG{

unsigned long AccCode;

unsigned long AccMask;

unsigned long Reserved;

unsigned char Filter;

unsigned char Timing0;

unsigned char Timing1;

unsigned char Mode;

}VCI_INIT_CONFIG,*PVCI_INIT_CONFIG;

///////// new add struct for filter /////////

typedef struct _VCI_FILTER_RECORD{

unsigned long ExtFrame; //是否为扩展帧

unsigned long Start;

unsigned long End;

}VCI_FILTER_RECORD,*PVCI_FILTER_RECORD;

#define EXTERNC extern "C"

EXTERNC unsigned long __stdcall VCI_OpenDevice(unsigned long DeviceType,unsigned long DeviceInd,unsigned long Reserved);

EXTERNC unsigned long __stdcall VCI_CloseDevice(unsigned long DeviceType,unsigned long DeviceInd);

EXTERNC unsigned long __stdcall VCI_InitCAN(unsigned long DeviceType, unsigned long DeviceInd, unsigned long CANInd, PVCI_INIT_CONFIG pInitConfig);

EXTERNC unsigned long __stdcall VCI_ReadBoardInfo(unsigned long DeviceType,unsigned long DeviceInd,PVCI_BOARD_INFO pInfo);

EXTERNC unsigned long __stdcall VCI_SetReference(unsigned long DeviceType,unsigned long DeviceInd,unsigned long CANInd,unsigned long RefType,void* pData);

EXTERNC unsigned long __stdcall VCI_GetReceiveNum(unsigned long DeviceType,unsigned long DeviceInd,unsigned long CANInd);

EXTERNC unsigned long __stdcall VCI_ClearBuffer(unsigned long DeviceType,unsigned long DeviceInd,unsigned long CANInd);

EXTERNC unsigned long __stdcall VCI_StartCAN(unsigned long DeviceType,unsigned long DeviceInd,unsigned long CANInd);

EXTERNC unsigned long __stdcall VCI_ResetCAN(unsigned long DeviceType,unsigned long DeviceInd,unsigned long CANInd);

EXTERNC unsigned long __stdcall VCI_Transmit(unsigned long DeviceType,unsigned long DeviceInd,unsigned long CANInd,PVCI_CAN_OBJ pSend,unsigned long Len);

EXTERNC unsigned long __stdcall VCI_Receive(unsigned long DeviceType,unsigned long DeviceInd,unsigned long CANInd,PVCI_CAN_OBJ pReceive,unsigned long Len,int WaitTime);

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