USART at 5 baud?

[adamajames2]

Posted on September 18, 2008 at 12:32

USART at 5 baud?

[adamajames2]

Posted on May 17, 2011 at 12:45

I'm trying to write a byte at 5 baud before switching quickly back to 10400 baud to receive. USART 1 with a 72MHz clock won't go much below 1000 baud. Any ideas what set up I could use?

[st3]

Posted on May 17, 2011 at 12:45

At that speed (or lack thereof!), couldn't you just bit-bang it?! 8-)

[adamajames2]

Posted on May 17, 2011 at 12:45

Yep, I'll have to if no one can come up with the USART solution.

[tibo]

Posted on May 17, 2011 at 12:45

If SYSCLK = 72 MHz: AHB Prescaler = 8, APB Prescaler = 16 => min. baud rate ~ 4,3.

But of course your cpu clock is only 9 MHz…