魚的方舟圖形語言的世界 - LabVIEW & Arduino & Python工作室 - 新網站https://labview-tech.blogspot.com/

2014/03/09

最近在寫RS232的程式，

Currently, I am writing the RS232 program.

不過因為大部分的筆電都沒有COM port了，所以用了一條RS232轉USB的線，

Because COM port usualy is removed form NoteBook, I use the RS232-USB convertion device for my program.

在MCU端與PC端都要寫RS232或USB的程式，

In RS232 or USB programming, I have to implement software on MCU and PC.

在USB中可以傳一個8bit的數值到PC上，PC也可以直接傳數值回來，

In USB software, 8 bit data can directly tansmit and recieve between MCU and PC.

而在RS232上，傳得是字串，也就是說，100需要拆成'1','0','0',

But in RS232 software, it is more complicated.

For exampe, the numeric value of 100 is divided into 3 strings: '1','0','0' and then send to PC form MCU.

傳到PC端後又需要將'1','0','0'組成數值的100，

PC recieve these strings and then arrange 3 strings into the numeric value.

在我的使用經驗上，用有USB晶片是會貴一些，但在處理一些數值的程序上會相較簡單需多。

In my experience, MCU with USB functiion is a littile bit expensive than MUC with RS232.

But USB software is easier to process the numeric data communication.

也需之後比較有空，再來寫寫RS232的教學。

Maybe when i am free, i can share some RS232 program on this website.

PS: MCU: C18 progam PIC18F series (Microchip),

      PC: LabVIEW's  Serial Read and Write function.

 2014/03/15

我發現如何使用Labview的RS232範例傳8bit 資料而不是字串，

I find how to use LabVIEW serial example to transmit 8 bit data rather than string.

可以參考列網指的說明程式:

You can refer to this website to obtain how to do it.

http://www.fmf.uni-lj.si/~ponikvar/PDFji/Experiments%20with%20Labview%20and%20RS2321_rev3.pdf

提示(hint): String to Byte Array VI