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edison-gpio.sh
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edison-gpio.sh
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# TRI_STATE_ALL buffer
echo -n "214" > /sys/class/gpio/export
# Pin 0 - Rx
echo -n "130" > /sys/class/gpio/export # rx (input)
echo -n "248" > /sys/class/gpio/export # output enable
echo -n "216" > /sys/class/gpio/export # pullup enable
#Pin 1 - TX
echo -n "131" > /sys/class/gpio/export # tx (output)
echo -n "249" > /sys/class/gpio/export # output enable
echo -n "217" > /sys/class/gpio/export # pullup enable
echo low > /sys/class/gpio/gpio214/direction # Set the TRI_STATE_ALL to low before doing any changes
echo low > /sys/class/gpio/gpio248/direction
echo in > /sys/class/gpio/gpio216/direction
echo mode1 > /sys/kernel/debug/gpio_debug/gpio130/current_pinmux # mode1 is used to set the UART interface in Edison
echo in > /sys/class/gpio/gpio130/direction
echo high > /sys/class/gpio/gpio249/direction
echo in > /sys/class/gpio/gpio217/direction
echo mode1 > /sys/kernel/debug/gpio_debug/gpio131/current_pinmux # mode1 is used to
set the UART interface in Edison
echo out > /sys/class/gpio/gpio131/direction
echo high > /sys/class/gpio/gpio214/direction # Set the TRI_STATE_ALL to high after the changes are applied