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

All,
 

Happy new year!!

 

Quick ISR question;  If I want to run an ISR dual uart using 3 times sampling rather than 4 so I can add buffer code to the ISR, would the following figures be correct?

 

SX18 at 50mhz (1/50000000 = 20ns)

int_period at 144 (144 * 20ns = 2.88us)

baud_rate_divisor at 3 (3 * 144 = 4.32us)

baud_rate_start_delay at 4 (4 * 144 = 5.76us - a little short I know)

 

So with a dual uart approach I guess every 3 ISR's I am transmitting and recieving (bar start bits) on one of the uarts.

 

Does this look correct?

 

Many thanks for any help!!

 

James

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


You can view the post on-line at:
http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=103096

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

The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2006 (http://www.dotNetBB.com)