see
Hi Yonatan
seems on that board UART3 is used in DTE mode,
that is UART3_TXD is input and connected to output
U25 SN74AVC4T245 . Suggest to post that on
http://variwiki.com/index.php?title=Main_Page
Best regards
igor
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Dear Igor,
As I understand, if we didn't change the DCEDTE control bit, it should be set as DCE (0), by default. No? So, actually, UART3_TXD had to act as an output. The pin is indeed acts as an output, it constantly set to 3.3V.
I also checked the RTS and CTE pins, to verify if we are in DCE or DTE mode. Seems that CTS acts as an output, which means we are in a DCE mode, no?
We also tried to modify the DCEDTE control bit, but seems that we have no control. CTS remained as an output, while RTS remained as an input.
Looks like something else is overruling our control.
Hi Yonatan
problem is that output U25 SN74AVC4T245 is
connected to UART3 UART3_TXD, so whatever
mode you choses U25 will drive that signal, not UART.
~igor
Dear Igor,
Okay. So I understand I cannot do nothing with this signal.
I have to look for another alternatives, like CSI0_DAT14 (GPIO6[0]), to get my desired GPIO.
Many thanks for your support and prompt reply.
Yonatan