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Forum : Digole Serial Display :

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UART format variables B

Posted at:2015-04-27 10:26:13     

 I use UART. I read the manual, but I do not understand in what format to write variables in the command. Bad that there are no examples in the manual.

For example, I'm trying to change the font command
echo "SF6TTtest"> / dev / ttyATH0 but it does not work. I went through different options CLSFx6TTtest SF0x06TTtest SF/x06TTtest SF06TTtest
But I did not understand how it works. In what format should be B-one byte?
Administrator
Total Posts:
45 
Since:
2013-Dec-22 
From:
Canada

RE:UART format variables B

Posted at:2015-08-25 12:57:07     

 B is "unsigned char" value, not ASCII, you can't do "SF6", you need "SF\x06" in language C
khseal
Total Posts:
34 
Since:
2015-Apr-27 
From:
Russian Federation

RE:UART format variables B

Posted at:2015-08-25 18:28:52 Edited at:2015-08-25 18:37:20    

 

Ok. I can do the same in Linux console?

I tried echo "SF\x06TTtest"> /dev/ttyATH0 it does not work.
Administrator
Total Posts:
45 
Since:
2013-Dec-22 
From:
Canada

RE:UART format variables B

Posted at:2015-08-25 18:34:57     

 No, only in C language, otherwise you need send 6 as a byte of value, but you can try software name CoolTerm, this software available for Windows, Mac os and Linux
khseal
Total Posts:
34 
Since:
2015-Apr-27 
From:
Russian Federation

RE:UART format variables B

Posted at:2015-08-26 09:14:34 Edited at:2015-08-26 09:37:12    

 No only C.

I used LUA.

local out = io.open("/dev/ttyATH0", "wb")
out:write("SF" .. string.char(6))
out:write("TTshaurma" .. string.char(0))
 
out:write("SF" .. string.char(10))
out:write("TTshaurma" .. string.char(0))
 
out:write("SF" .. string.char(18))
out:write("TTshaurma" .. string.char(0))
out:close()
 
or in linux console work
 
echo -e "CLSF\x06TTtest" > /dev/ttyATH0
Administrator
Total Posts:
45 
Since:
2013-Dec-22 
From:
Canada

RE:UART format variables B

Posted at:2015-08-26 11:47:19     

 Does "TT" command work? if none commands work, you need check the communicating port set up.
khseal
Total Posts:
34 
Since:
2015-Apr-27 
From:
Russian Federation

RE:UART format variables B

Posted at:2015-08-26 12:03:27     

 Everything is fine. The last command that I gave the example of work without problems.
Administrator
Total Posts:
45 
Since:
2013-Dec-22 
From:
Canada

RE:UART format variables B

Posted at:2015-08-26 12:46:37     

 Great!
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