刚刚开始学习VB,做一个接收数据的软件用到了MSCOMM控件。该进口设备的关于特殊字码的说明文件如是:
<ACK> (06h) : acknowledge without error
<NACK> (15h) : acknowledge with error
<ETX> (03h) : end of text transmission
<STX> (02h) : start of text transmission
[C1] : most significant character of checksum
[C2] : least significant character of checksum
<ENQ> (05h) : request for line (enquiry)
<ETB> (17h) : end of transmission block
<EOT> (04h) : end of transmission
<CR> (0Dh) : carriage return
<LF> (0Ah) : line feed
在编程中我的代码为ACK=CHR(6)NACK=CHR(15)等等,
但是在不知道<CR>和<LF>的表达是应该如何的。望高手能指点一二为谢!
<ACK> (06h) : acknowledge without error
<NACK> (15h) : acknowledge with error
<ETX> (03h) : end of text transmission
<STX> (02h) : start of text transmission
[C1] : most significant character of checksum
[C2] : least significant character of checksum
<ENQ> (05h) : request for line (enquiry)
<ETB> (17h) : end of transmission block
<EOT> (04h) : end of transmission
<CR> (0Dh) : carriage return
<LF> (0Ah) : line feed
在编程中我的代码为ACK=CHR(6)NACK=CHR(15)等等,
但是在不知道<CR>和<LF>的表达是应该如何的。望高手能指点一二为谢!
解决方案 »
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