In SX Microcontrollers, SX/B Compiler and SX-Key Tool, DosManDan wrote:

I have one SX-28 talking to another SX-28 using a single wire serial connection. The second SX-28 is controlling an LCD.
 

The problem is, I'm receiving random characters in between and after the actual characters I'm sending to the LCD panel. I moved the serial wire over to a BS2 and it worked perfect. So, I have to believe there is something up with the SX-28. Should I have the SX-28 port set to TTL or CMOS?

 

I'm using the same schematics and hookup as shown in the LCD example from the SXB help file.

 

I put the ocsilliscope on the serial line, and the garbage characters are actually coming in on the line from the first SX-28. Could this be caused by a timing issue or line noise? 

 

I'm using the SEROUT command on both the BS2 and SX-28. I'm starting to wonder if the difference is in the way the BS2 and SX-28 handle that command. On the BS2, I can send a string, and on the SX-28 I can only send a byte at a time. To communicate with the LCD panel, I need to send two bytes, one with the command and the other with the character I want to display.

 

Thanks in advance!

Dan

---------- End of Message ----------


You can view the post on-line at:
http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=273418

Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com

The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2008 (http://www.dotNetBB.com)