About rs232 on motorola mpc8260 ads board
Hello,everyone.
I'm trying to make the SCC1 drived rs232 port of a motorola mpc8260 ads board work.The manual says it can direct connect to pc com port.But it seems the output from this board is not rs232 voltage.i.e -3 to -12 for logical one,3 to 12 for logical zero,nor is it TTL,it seems that it use 0 for logical 1,5.0v for logical 0,so it is rather annoying. I have to invert the output from 8260 ads,then use a TTL->232 converter to connect with PC, it works when i send char from 8260,but cannot work in the other direction.
In addition,for a while,it output 232 signal,but i cannot reproduce it!!
Does anyone has experience with this board?
Thanks for your advice.
davidzhang
3/22/2000_____________________________________________
������--�й��˵����ϼ� http://www.263.net
@263.net�й����������ʾ� http://freemail.263.net
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----- Original Message -----
From: zzh <[email protected]>
To: <[email protected]>
Sent: Wednesday, March 22, 2000 4:28 PM
Subject: About rs232 on motorola mpc8260 ads board
Quoted 15 lines
Hello,everyone.
I'm trying to make the SCC1 drived rs232 port of a motorola mpc8260 ads board work.The manual says it can direct connect to pc com port.But it seems the output from this board is not rs232 voltage.i.e -3 to -12 for logical one,3 to 12 for logical zero,nor is it TTL,it seems that it use 0 for logical 1,5.0v for logical 0,so it is rather annoying. I have to invert the output from 8260 ads,then use a TTL->232 converter to connect with PC, it works when i send char from 8260,but cannot work in the other direction.
In addition,for a while,it output 232 signal,but i cannot reproduce it!!
Does anyone has experience with this board?
Thanks for your advice.
Quoted 7 lines
davidzhang 3/22/2000_____________________________________________
首都在线--中国人的网上家园 http://www.263.net
@263.net中国最大的在线邮局 http://freemail.263.net
Pavel Roskin is right , that means to check RTS(from ads) or enable it manually.
b.r.
john zhan.
hacking time.
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Hello!
Quoted 2 lines
it works when i send char from 8260,but cannot work in the other direction.
Make sure that your communication program ignores the modem lines. I had this problem with IVT (http://home.wxs.nl/~ruurdb/IVT.HTM).
Try TeraTerm PRO (for Win32) or Minicom (for *X), they are known to be Ok.
Pavel Roskin
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