pythonを使用してCAN通信のDLL実現方法を呼び出します。
仕事上の必要性から常にUSBCANとの付き合いが必要ですが、メーカーはPYTHONの例を提供しないので、自分で手探りで例を書いて、仕事上でいつでもPYTHONを使ってCANの機能をテストすることができます。ここの例は珠海創芯科技有限公司のUSBCAANインターフェイスカードを使って、彼らはControlCAN.dllを提供します。
Control CAN.dll
1
1
8
[1,2,3,4,5,6,7,64]
通路1里からチャンネル0から送られてきたデータが見えます。このプログラムの目的を達成します。
以上のpythonを使ってCAN通信のDLLの実現方法を呼び出します。小編集は皆さんに全部の内容を共有しています。参考にしてもらいたいです。どうぞよろしくお願いします。
#ifndef CONTROLCAN_H
#define CONTROLCAN_H
//// ：v2.00 20150920
//#include <cvidef.h> // CVI ， 。
//
#define VCI_USBCAN1 3
#define VCI_USBCAN2 4
#define VCI_USBCAN2A 4
#define VCI_USBCAN_E_U 20
#define VCI_USBCAN_2E_U 21
//
#define STATUS_OK 1
#define STATUS_ERR 0
/*------------------------------------------------ ZLG ------------------------------------------------*/
//1.ZLGCAN 。
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. CAN 。
typedef struct _VCI_CAN_OBJ{
unsigned int ID;
unsigned int TimeStamp;
unsigned char TimeFlag;
unsigned char SendType;
unsigned char RemoteFlag;//
unsigned char ExternFlag;//
unsigned char DataLen;
unsigned char Data[8];
unsigned char Reserved[3];
}VCI_CAN_OBJ,*PVCI_CAN_OBJ;
//3. CAN
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; //
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);
/*------------------------------------------------ ------------------------------------------------*/
//USB-CAN 1， VCI_FindUsbDevice 。
typedef struct _VCI_BOARD_INFO1{
unsigned long hw_Version;
unsigned long fw_Version;
unsigned long dr_Version;
unsigned long in_Version;
unsigned long irq_Num;
unsigned char can_Num;
unsigned char Reserved;
char str_Serial_Num[8];
char str_hw_Type[16];
char str_Usb_Serial[4][4];
} VCI_BOARD_INFO1,*PVCI_BOARD_INFO1;
//USB-CAN 2， VCI_FindUsbDevice 。
typedef struct _VCI_BOARD_INFO2{
unsigned long hw_Version;
unsigned long fw_Version;
unsigned long dr_Version;
unsigned long in_Version;
unsigned long irq_Num;
unsigned char can_Num;
unsigned char Reserved;
char str_Serial_Num[8];
char str_hw_Type[16];
char str_Usb_Serial[10][4];
} VCI_BOARD_INFO2,*PVCI_BOARD_INFO2;
#define EXTERNC extern "C"
EXTERNC unsigned long __stdcall VCI_GetReference2(unsigned long DevType,unsigned long DevIndex,unsigned long CANIndex,unsigned long Reserved,unsigned char *pData);
EXTERNC unsigned long __stdcall VCI_SetReference2(unsigned long DevType,unsigned long DevIndex,unsigned long CANIndex,unsigned long RefType,unsigned char *pData);
EXTERNC unsigned long __stdcall VCI_ConnectDevice(unsigned long DevType,unsigned long DevIndex);
EXTERNC unsigned long __stdcall VCI_UsbDeviceReset(unsigned long DevType,unsigned long DevIndex,unsigned long Reserved);
EXTERNC unsigned long __stdcall VCI_FindUsbDevice(PVCI_BOARD_INFO1 pInfo);
EXTERNC unsigned long __stdcall VCI_FindUsbDevice2(PVCI_BOARD_INFO2 pInfo);
#endif
#python3.6 32
#https://blog.csdn.net/caimouse/article/details/51749579
# ： （QQ：9073204） 2018-3-25
#
from ctypes import *
VCI_USBCAN2A = 4
STATUS_OK = 1
class VCI_INIT_CONFIG(Structure):
_fields_ = [("AccCode", c_ulong),
("AccMask", c_ulong),
("Reserved", c_ulong),
("Filter", c_ubyte),
("Timing0", c_ubyte),
("Timing1", c_ubyte),
("Mode", c_ubyte)
]
class VCI_CAN_OBJ(Structure):
_fields_ = [("ID", c_uint),
("TimeStamp", c_uint),
("TimeFlag", c_ubyte),
("SendType", c_ubyte),
("RemoteFlag", c_ubyte),
("ExternFlag", c_ubyte),
("DataLen", c_ubyte),
("Data", c_ubyte*8),
("Reserved", c_ubyte*3)
]
CanDLLName = 'ControlCAN.dll' #DLL 32 ， 32 PYTHON
canDLL = windll.LoadLibrary(CanDLLName)
print(CanDLLName)
ret = canDLL.VCI_OpenDevice(VCI_USBCAN2A, 0, 0)
print(ret)
if ret != STATUS_OK:
print(' VCI_OpenDevice \r
')
# 0
vci_initconfig = VCI_INIT_CONFIG(0x80000008, 0xFFFFFFFF, 0,
2, 0x00, 0x1C, 0)
ret = canDLL.VCI_InitCAN(VCI_USBCAN2A, 0, 0, byref(vci_initconfig))
if ret != STATUS_OK:
print(' VCI_InitCAN \r
')
ret = canDLL.VCI_StartCAN(VCI_USBCAN2A, 0, 0)
if ret != STATUS_OK:
print(' VCI_StartCAN \r
')
# 1
ret = canDLL.VCI_InitCAN(VCI_USBCAN2A, 0, 1, byref(vci_initconfig))
if ret != STATUS_OK:
print(' VCI_InitCAN 1 \r
')
ret = canDLL.VCI_StartCAN(VCI_USBCAN2A, 0, 1)
if ret != STATUS_OK:
print(' VCI_StartCAN 1 \r
')
# 0
ubyte_array = c_ubyte*8
a = ubyte_array(1,2,3,4, 5, 6, 7, 64)
ubyte_3array = c_ubyte*3
b = ubyte_3array(0, 0 , 0)
vci_can_obj = VCI_CAN_OBJ(0x0, 0, 0, 1, 0, 0, 8, a, b)
ret = canDLL.VCI_Transmit(VCI_USBCAN2A, 0, 0, byref(vci_can_obj), 1)
if ret != STATUS_OK:
print(' VCI_Transmit \r
')
# 1
a = ubyte_array(0, 0, 0, 0, 0, 0, 0, 0)
vci_can_obj = VCI_CAN_OBJ(0x0, 0, 0, 1, 0, 0, 8, a, b)
ret = canDLL.VCI_Receive(VCI_USBCAN2A, 0, 1, byref(vci_can_obj), 1, 0)
print(ret)
while ret <= 0:
print(' VCI_Receive \r
')
ret = canDLL.VCI_Receive(VCI_USBCAN2A, 0, 1, byref(vci_can_obj), 1, 0)
if ret > 0:
print(vci_can_obj.DataLen)
print(list(vci_can_obj.Data))
#
canDLL.VCI_CloseDevice(VCI_USBCAN2A, 0)
Control CAN.dll
1
1
8
[1,2,3,4,5,6,7,64]
通路1里からチャンネル0から送られてきたデータが見えます。このプログラムの目的を達成します。
以上のpythonを使ってCAN通信のDLLの実現方法を呼び出します。小編集は皆さんに全部の内容を共有しています。参考にしてもらいたいです。どうぞよろしくお願いします。