VBA控制周立功CAN卡接收和发送报文代码

下面是一个使用VBA控制周立功CAN卡接收和发送报文的示例代码：

首先，要在代码中引用周立功CAN卡的API库文件，可以使用以下代码：

Private Declare Function OpenDevice Lib "ZLGCAN.dll" (ByVal DeviceType As Long, ByVal DeviceInd As Long, ByVal Reserved As Long) As Long
Private Declare Function CloseDevice Lib "ZLGCAN.dll" (ByVal DeviceType As Long, ByVal DeviceInd As Long) As Long
Private Declare Function InitCAN Lib "ZLGCAN.dll" (ByVal DeviceType As Long, ByVal DeviceInd As Long, ByVal CANInd As Long, ByRef pInitConfig As CanInitConfig) As Long
Private Declare Function ReadCanMsg Lib "ZLGCAN.dll" (ByVal DeviceType As Long, ByVal DeviceInd As Long, ByVal CANInd As Long, ByRef pCanMsg As CanMsg, ByVal Len As Long, ByVal WaitTime As Long) As Long
Private Declare Function Transmit Lib "ZLGCAN.dll" (ByVal DeviceType As Long, ByVal DeviceInd As Long, ByVal CANInd As Long, ByRef pSend As CanMsg, ByVal Length As Long) As Long

然后，定义CAN卡的初始化配置和CAN消息结构体：

Type CanInitConfig
    AccCode As Long
    AccMask As Long
    Reserved As Long
    Filter As Byte
    Timing0 As Byte
    Timing1 As Byte
    Mode As Byte
End Type

Type CanMsg
    ID As Long
    TimeStamp As Long
    TimeFlag As Byte
    SendType As Byte
    RemoteFlag As Byte
    ExternFlag As Byte
    DataLen As Byte
    Data(7) As Byte
    Reserved As Long
End Type

接下来就是具体的发送和接收CAN消息的代码：

发送CAN消息：

Dim canMsg As CanMsg
canMsg.ID = 0x123
canMsg.DataLen = 8
canMsg.Data(0) = 0x11
canMsg.Data(1) = 0x22
canMsg.Data(2) = 0x33
canMsg.Data(3) = 0x44
canMsg.Data(4) = 0x55
canMsg.Data(5) = 0x66
canMsg.Data(6) = 0x77
canMsg.Data(7) = 0x88
Transmit 4, 0, 0, canMsg, 1

接收CAN消息：

Dim canMsg As CanMsg
ReadCanMsg 4, 0, 0, canMsg, 1, 100
Debug.Print "ID: " & canMsg.ID
Debug.Print "Data: " & canMsg.Data(0) & " " & canMsg.Data(1) & " " & canMsg.Data(2) & " " & canMsg.Data(3) & " " & canMsg.Data(4) & " " & canMsg.Data(5) & " " & canMsg.Data(6) & " " & canMsg.Data(7)

需要注意的是，在使用周立功CAN卡时，需要先打开设备并初始化CAN卡。完整的代码示例如下：

Private Declare Function OpenDevice Lib "ZLGCAN.dll" (ByVal DeviceType As Long, ByVal DeviceInd As Long, ByVal Reserved As Long) As Long
Private Declare Function CloseDevice Lib "ZLGCAN.dll" (ByVal DeviceType As Long, ByVal DeviceInd As Long) As Long
Private Declare Function InitCAN Lib "ZLGCAN.dll" (ByVal DeviceType As Long, ByVal DeviceInd As Long, ByVal CANInd As Long, ByRef pInitConfig As CanInitConfig) As Long
Private Declare Function ReadCanMsg Lib "ZLGCAN.dll" (ByVal DeviceType As Long, ByVal DeviceInd As Long, ByVal CANInd As Long, ByRef pCanMsg As CanMsg, ByVal Len As Long, ByVal WaitTime As Long) As Long
Private Declare Function Transmit Lib "ZLGCAN.dll" (ByVal DeviceType As Long, ByVal DeviceInd As Long, ByVal CANInd As Long, ByRef pSend As CanMsg, ByVal Length As Long) As Long

Type CanInitConfig
    AccCode As Long
    AccMask As Long
    Reserved As Long
    Filter As Byte
    Timing0 As Byte
    Timing1 As Byte
    Mode As Byte
End Type

Type CanMsg
    ID As Long
    TimeStamp As Long
    TimeFlag As Byte
    SendType As Byte
    RemoteFlag As Byte
    ExternFlag As Byte
    DataLen As Byte
    Data(7) As Byte
    Reserved As Long
End Type

Sub Test()
    Dim initConfig As CanInitConfig
    initConfig.AccCode = 0
    initConfig.AccMask = &HFFFFFFFF
    initConfig.Filter = 1
    initConfig.Timing0 = &H1C
    initConfig.Timing1 = &H1C
    initConfig.Mode = 0
    OpenDevice 4, 0, 0
    InitCAN 4, 0, 0, initConfig
    
    Dim canMsg As CanMsg
    canMsg.ID = 0x123
    canMsg.DataLen = 8
    canMsg.Data(0) = 0x11
    canMsg.Data(1) = 0x22
    canMsg.Data(2) = 0x33
    canMsg.Data(3) = 0x44
    canMsg.Data(4) = 0x55
    canMsg.Data(5) = 0x66
    canMsg.Data(6) = 0x77
    canMsg.Data(7) = 0x88
    Transmit 4, 0, 0, canMsg, 1
    
    ReadCanMsg 4, 0, 0, canMsg, 1, 100
    Debug.Print "ID: " & canMsg.ID
    Debug.Print "Data: " & canMsg.Data(0) & " " & canMsg.Data(1) & " " & canMsg.Data(2) & " " & canMsg.Data(3) & " " & canMsg.Data(4) & " " & canMsg.Data(5) & " " & canMsg.Data(6) & " " & canMsg.Data(7)
    
    CloseDevice 4, 0
End Sub