grossetete.md: Add documentation for uart
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
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@@ -34,7 +34,9 @@ CLK = 65
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2)
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**UART** Some pins are labelled as UARTs but are not configured in BIOS as UART
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so only available UART is on the FTDI header
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so only available UART is on the FTDI header. Disable the getty on ttyS2 and
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use mraa's uart raw mode to initialise on ttyS2. The Jumper J8 can be used to
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switch between using the FTDI 6 pin header and the micro USB output.
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Pin Mapping
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-----------
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