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Discussion Groups | Analog Devices DSPs | SPORT-UART communication with TxFs

Technical discussions related to Analog Devices DSPs (including Blackfin, TigerSHARC, SHARC and ADSP-21xx DSPs).

  

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SPORT-UART communication with TxFs - steh...@hotmail.com - Mar 28 7:57:04 2007



Hi,
I am tying to communicate with a UART device though my SPORT. My TxFs and RxFs are connected,
also the clock is generated by the DSP and fowwloed by the UART device. 
What I have to do is that, after tansmission and reception of 9 bytes I have to stop
transmission and receptions for some time, and then re enable them again. For this purpose I am
disabling the SPORT in my receive interrupt because this interrupt occurs after the tx
interrupt. The poblem is that while reception is beng done another TxFs signal is generated.
What I gathered fom the hardware reference is that TxFs signal is not asserted unless something
is written to the Tx1 register.To handle this situation I have kept a flag that tells me that
in the current Tx interrupt I should not update the Tx1 register. But whether I update it o not
it generates the TxFs signals which is causing framing errors on the UART side. How can I come
about this situation?



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