53 lines
1.8 KiB
Plaintext
53 lines
1.8 KiB
Plaintext
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README.txt
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==========
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This README.txt file discusses the port of NuttX to the Intel Galileo
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board.
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NOTE: There is no port for the Galileo in place as of this writing. At this
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point in time, this README file is only a repository for pre-porting
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information. It is not clear as of this writing whether there ever will
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be a port to the Galileo development board or not.
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LEDs and Buttons
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================
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Serial Console
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==============
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Serial Console
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==============
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Galileo provides two options for a Serial Console:
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1) UART TTL (5V/3.3V) serial communication is available on Arduino
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digital 0 (pin 1, IO0) and digital 1 (pin 2, IO1). The function of IO0
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and IO1 are controlled via a TS5A23159 2-channel 2:
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multiplexer/demultiplexer
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--- ---- --------- -------------------------------------
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PIN NAME SIGNAL DESCRIPTION
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--- ---- --------- -------------------------------------
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1 IN1 IO0_MUX Select NO1 or NC1 as IO on COM1 = IO0
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2 NO1 LVL_RXD IN=L, IO0=RXD
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3 NC1 IO0_GPIO IN=H, IO0=GPIO
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--- ---- --------- -------------------------------------
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5 IN2 IO1_MUX Select NO1 or NC1 as IO on COM2 = IO1
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4 NO2 IO1_GPIO IN=L, IO1=GPIO
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7 NC2 LVL_TXD IN=H, IO2=TXD
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--- ---- --------- -------------------------------------
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The LVL_RXD/LVL_TXD driver from UART0_TXD/UART0_RXD via a TXS0108E
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voltage level translator that brings the which brings 1.2-3.6V signals
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to 165-5.5V.
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2) In addition, a second UART provides RS-232 support via a MAX3232 driver
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and is connected via a 3.5mm jack: Sleeve = GND, RING=SERIAL1_RXD, and
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TIP=SERIAL1_TXD.
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UART1 may be convenient because of its built-in RS232 drivers. But if you
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have a standard RS-232 shield, then UART0 may be the better choice.
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Configurations
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==============
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