STM32F030 parity error only with activated RXNEIE?

[Horn.Thomas]

Posted on July 05, 2016 at 09:47The original post was too long to process during our migration. Please click on the attachment to read the original post.

[waclawek.jan]

Posted on July 05, 2016 at 11:05

I guess the problem is that the USART stops receiving data (thus checking their parity) if you don't pick up the recieved bytes. Look at the ''Overrun error'' sub-chapter of the USART chapter in RM:

When an overrun error occurs: [...] The shift register will be overwritten. After that point, any data received during overrun is lost.You might perhaps want to relegate the task of reading the data to DMA. JW

[Horn.Thomas]

Posted on July 05, 2016 at 12:20

Thanks for the reply,

Yes, that might be the case. Actually I hoped that the data is checked before being transferred into RDR. DMA would be a solution, but then bus time is still consumed and a DMA channel.