接着，编写以下代码。

Private Sub btn_Close_Click()

MSComm1.PortOpen = False

btn_Start.Enabled = True

btn_Close.Enabled = False

End Sub

Private Sub btn_exit_Click()

If MSComm1.PortOpen = True Then

MSComm1.PortOpen = False

End If

Unload UserForm1

End Sub

Private Sub btn_Start_Click()

iniMSComm

MSComm1.PortOpen = True

btn_Close.Enabled = True

btn_Start.Enabled = False

End Sub

Private Sub iniMSComm()

MSComm1.CommPort = 5

MSComm1.Settings = “115200,n,8,1”

MSComm1.RThreshold = 1

MSComm1.InputLen = 0

MSComm1.PortOpen = True

MSComm1.InputMode = comInputModeText

MSComm1.RTSEnable = True

MSComm1.InBufferCount = 0

End Sub

Private Sub MSComm1_OnComm()

Dim t1 As Long, com_string As String

Static i As Integer

t1 = Timer

Select Case MSComm1.CommEvent

Case comEvReceive

MSComm1.RThreshold = 0

Do

DoEvents

Loop While Timer – t1 < 0.01

com_string = MSComm1.Input

MSComm1.RThreshold = 1

i = i + 1: If i > 255 Then i = 1

Application.Cells(3, i).Value = com_string

End Select

End Sub

Private Sub UserForm_Initialize()

iniMSComm

End Sub

然后，用串口模块连接好电路板和电脑，给电路板供电工作。

运行代码，就会看到串口信息在Excel里打印出来了。

最后，把编号代码的Excel保存成xlsm 格式的文件，以后想用时，直接打开就可以。