P4080DS UART No Output

yyurtcan — Thu, 22 Jun 2017 12:07:46 GMT

Hi,

I have board based on p4080ds. When I power on board, there is no output from uart. I checked duart registers and I found that BI status is interrupted in the ULSR1 register and RXRDY status is not ready in the UDSR1 register. I could not find what are the reasons for that?

Best regards.

Re: P4080DS UART No Output

alexander_yakov — Sun, 25 Jun 2017 06:49:36 GMT

BI means break condition - Rx line was held in logic "zero" for more than character time.

The reason, why RXRDY is cleared is specified in Table 17-106 "UDSR[RXRDY] Cleared Conditions" of P4080 Reference Manual.

P4080 Reference Manual (P4080RM) is available from P4080 product page, "Documentation" tab:

QorIQ® P4080|NXP

Have a great day,
Alexander
TIC

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PowerQUICC ProcessorsのトピックP4080DS UART No Output

P4080DS UART No Output

Re: P4080DS UART No Output