' 定義變量
Dim Row(4) As Byte ' 定義一個長度為4的字節(jié)數(shù)組，用于存儲每行的掃描碼
Dim Ar(4) As Byte ' 定義一個長度為4的字節(jié)數(shù)組，用于存儲發(fā)送給1-Wire設(shè)備的命令和數(shù)據(jù)
Dim a As Byte ' 定義一個字節(jié)變量a，用于臨時存儲數(shù)據(jù)
Dim Key As Byte ' 定義一個字節(jié)變量Key，用于存儲檢測到的按鍵值
Dim Rowlus As Byte ' 定義一個字節(jié)變量Rowlus，用于循環(huán)遍歷每一行
1wwrite Ar(1), 4 ' 向1-Wire設(shè)備寫入命令和數(shù)據(jù)
Ar(1) = 1wread(2) ' 從1-Wire設(shè)備讀取響應(yīng)（通常是按鍵的標(biāo)識）
A = Ar(2) And &B00011110 ' 提取響應(yīng)中的按鍵標(biāo)識位
' 根據(jù)響應(yīng)判斷按鍵值
Select Case A
Case 30: Key = 0 ' 無按鍵按下
Case 28:
' 根據(jù)行號確定具體的按鍵值
If Rowlus = 1 Then Key = 16
If Rowlus = 2 Then Key = 9
If Rowlus = 3 Then Key = 8
If Rowlus = 4 Then Key = 7
Case 26:
If Rowlus = 1 Then Key = 15
If Rowlus = 2 Then Key = 6
If Rowlus = 3 Then Key = 5
If Rowlus = 4 Then Key = 4
Case 22:
If Rowlus = 1 Then Key = 14
If Rowlus = 2 Then Key = 3
If Rowlus = 3 Then Key = 2
If Rowlus = 4 Then Key = 1
Case 14:
If Rowlus = 1 Then Key = 13
If Rowlus = 2 Then Key = 12
If Rowlus = 3 Then Key = 11
If Rowlus = 4 Then Key = 10
Case Else: Key = 0 ' 其他情況視為無按鍵按下
End Select
' 如果檢測到按鍵，則退出循環(huán)
If Key > 0 Then Exit For
Next Rowlus
Return ' 返回主程序
