TMS320F28335: UART break detection BRKDT happening on 9 bits instead of 10

Colombo Carlo

HI everybody ,

I m on F28335 , uart set to be 115200 , and needing BRKDT to happen after 10bits ( The 10bits expectation is taken From sprufz5a.pdf section SCI interrupt 1.2.8 section ) .

now I measured with scope and found happening after 9 : please where am I wrong ?

what can I test ? do you have a working example with 10 or even mroe for BRKDT ?

thank you

bets regards

Carlo

over 7 years ago

0 Cody Watkins over 7 years ago

TI__Mastermind 42195 points

Carlo,

What is the F28335 device communicating with?

Can you include some screenshots showing this issue occurring?

Can you ask the customer to characterize exactly how many bit times will cause the BRKDT to be set? I've done this previously using a function generator.

I ask the previous question because I've seen a similar issues that was caused by either input clock or bit time error. I have attached a post for reference, however I can't say if this issue would have the same sensitivity to input clock or input signal error.