"Break" condition in UART protocol decoder

[TOIVI]

Hi @attila

When using the UART protocol decoder of the logic analyzer tool, the decoded waveform is correct, but the h00 byte is detected as a "Break" trigger condition.

Configuration:
DIO0 UART TX, auto standard rate (19.2110656 kbps).
Trigger source: DIO0 Protocol/Break

(The measured length of the low signal level is 469.3 us.) 

The same thing happens when DIO0 UART TX is configured to Manual rate, 19.2 kbps.

[attila]

Hi @TOIVI

Currently the break trigger uses a negative pulse of at least 9 bits long, 1 + uart bits + ?parity, which is on the limit of NUL.
It will be fixed in the next version 3.21.14 to be 10 bits long.
Alternatively configure a pulse trigger of at least 520us

[TOIVI]

Thank You @attila !

[Sid Price]

HI, while I am not using the break as a trigger, I am getting an 8-bit value of 0x00 displayed as "BREAK," plus, I see a value of "0xEE" noted as a framing error. Are these two issues related to the above, if so, when do you anticipate the next release of Waveforms?

 

[attila]

Hi @Sid Price

It was corrected long time ago. The beak trigger negative pulse longer than 10 bits (1+8+1+parity), for 19.2kHz  >520.832us

 

In capture it looks like there is an extra parity bit. Make sure to configure the interpreter correctly.