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102 lines
3.2 KiB
102 lines
3.2 KiB
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#python3.8.0 64位（python 32位要用32位的DLL）
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#
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from ctypes import *
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VCI_USBCAN2 = 4
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STATUS_OK = 1
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class VCI_INIT_CONFIG(Structure):
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_fields_ = [("AccCode", c_uint),
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("AccMask", c_uint),
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("Reserved", c_uint),
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("Filter", c_ubyte),
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("Timing0", c_ubyte),
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("Timing1", c_ubyte),
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("Mode", c_ubyte)
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]
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class VCI_CAN_OBJ(Structure):
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_fields_ = [("ID", c_uint),
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("TimeStamp", c_uint),
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("TimeFlag", c_ubyte),
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("SendType", c_ubyte),
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("RemoteFlag", c_ubyte),
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("ExternFlag", c_ubyte),
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("DataLen", c_ubyte),
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("Data", c_ubyte*8),
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("Reserved", c_ubyte*3)
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]
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CanDLLName = './ControlCAN.dll' #把DLL放到对应的目录下
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#canDLL = windll.LoadLibrary('./ControlCAN.dll')
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#Linux系统下使用下面语句，编译命令：python3 python3.8.0.py
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canDLL = cdll.LoadLibrary('./libcontrolcan.so')
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print(CanDLLName)
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ret = canDLL.VCI_OpenDevice(VCI_USBCAN2, 0, 0)
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if ret == STATUS_OK:
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print('调用 VCI_OpenDevice成功\r\n')
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if ret != STATUS_OK:
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print('调用 VCI_OpenDevice出错\r\n')
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#初始0通道
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vci_initconfig = VCI_INIT_CONFIG(0x80000008, 0xFFFFFFFF, 0,
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0, 0x03, 0x1C, 0)#波特率125k，正常模式
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ret = canDLL.VCI_InitCAN(VCI_USBCAN2, 0, 0, byref(vci_initconfig))
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if ret == STATUS_OK:
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print('调用 VCI_InitCAN1成功\r\n')
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if ret != STATUS_OK:
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print('调用 VCI_InitCAN1出错\r\n')
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ret = canDLL.VCI_StartCAN(VCI_USBCAN2, 0, 0)
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if ret == STATUS_OK:
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print('调用 VCI_StartCAN1成功\r\n')
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if ret != STATUS_OK:
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print('调用 VCI_StartCAN1出错\r\n')
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#初始1通道
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ret = canDLL.VCI_InitCAN(VCI_USBCAN2, 0, 1, byref(vci_initconfig))
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if ret == STATUS_OK:
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print('调用 VCI_InitCAN2 成功\r\n')
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if ret != STATUS_OK:
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print('调用 VCI_InitCAN2 出错\r\n')
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ret = canDLL.VCI_StartCAN(VCI_USBCAN2, 0, 1)
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if ret == STATUS_OK:
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print('调用 VCI_StartCAN2 成功\r\n')
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if ret != STATUS_OK:
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print('调用 VCI_StartCAN2 出错\r\n')
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#通道1发送数据
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ubyte_array = c_ubyte*8
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a = ubyte_array(1,2,3,4, 5, 6, 7, 8)
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ubyte_3array = c_ubyte*3
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b = ubyte_3array(0, 0 , 0)
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vci_can_obj = VCI_CAN_OBJ(0x1, 0, 0, 1, 0, 0, 8, a, b)#单次发送
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ret = canDLL.VCI_Transmit(VCI_USBCAN2, 0, 0, byref(vci_can_obj), 1)
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if ret == STATUS_OK:
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print('CAN1通道发送成功\r\n')
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if ret != STATUS_OK:
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print('CAN1通道发送失败\r\n')
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#通道2接收数据
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a = ubyte_array(0, 0, 0, 0, 0, 0, 0, 0)
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vci_can_obj = VCI_CAN_OBJ(0x0, 0, 0, 0, 0, 0, 0, a, b)#复位接收缓存
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ret = canDLL.VCI_Receive(VCI_USBCAN2, 0, 1, byref(vci_can_obj), 2500, 0)
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#print(ret)
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while ret <= 0:#如果没有接收到数据，一直循环查询接收。
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ret = canDLL.VCI_Receive(VCI_USBCAN2, 0, 1, byref(vci_can_obj), 2500, 0)
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if ret > 0:#接收到一帧数据
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print('CAN2通道接收成功\r\n')
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print('ID：')
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print(vci_can_obj.ID)
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print('DataLen：')
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print(vci_can_obj.DataLen)
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print('Data：')
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print(list(vci_can_obj.Data))
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#关闭
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canDLL.VCI_CloseDevice(VCI_USBCAN2, 0)
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