Cartft FLEETPC-ARM-300 Reference Manual page 28

// Linux commands for GPIO
# echo 1 > /sys/class/gpio/gpio232
# echo 0 > /sys/class/gpio/gpio232
# cat /sys/class/gpio/gpio224
The GPIO pins are from 3 different PCF8574 I/O expanders, with I
0x21 and 0x22 respectively. The schematics and I
FLEETPC-ARM-300 Series
// set gpio232 output high
// set gpio232 output low
// read gpio224 value
2
C addresses are in below diagrams:
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2
C addresses at 0x20,