Advantech FWA-2112, Руководство пользователя

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FWA-2112 User Manual 10
For FWA-2112, pin mapping are defined as below:
2. Control GPIOs.
“8” is smbus number and “0x23” is device address. “0x02” and “0x03” is offset, “0xff”
and other values are combined to control GPIO pin level.
1.3.2.3 Kernel GPIO sysfs to Control
The other interface to control LED from user space is by kernel GPIO sysfs. GPIO
sysfs also depends on i2c driver thus i2c_i801 must be loaded. It will use smbus
number and device address of IO expander located in previous chapter.
For more detail, please refer to kernel document:
https://www.kernel.org/doc/Documentation/gpio/sysfs.txt.
1. Probe i2c and gpio_ich drivers.
Pin LED Name
1 GPIO_0
2 GPIO_8
3 GPIO_1
4 GPIO_9
5 GPIO_2
6 GPIO_10
7 GPIO_3
8 GPIO_11
9 GPIO_4
10 GPIO_12
11 GPIO_5
12 GPIO_13
13 GPIO_6
14 GPIO_14
15 GPIO_7
16 GPIO_15
# sudo i2cset -y 8 0x23 0x02 0xff (GPIO0~7 high)
# sudo i2cset -y 8 0x23 0x03 0xff (GPIO8~15 high)
# sudo i2cset -y 8 0x23 0x02 0x00 (GPIO0~7 low)
# sudo i2cset -y 8 0x23 0x03 0x00 (GPIO8~15 low)
# sudo i2cset -y 8 0x23 0x02 0x01 (GPIO0 high, GPIO1~7 low)
# sudo i2cset -y 8 0x23 0x03 0x01 (GPIO8 high, GPIO9~15 low)
# sudo i2cset -y 8 0x23 0x02 0x02 (GPIO1 high, GPIO0 and GPIO2~7 low)
# sudo i2cset -y 8 0x23 0x03 0x02 (GPIO9 high, GPIO8 and GPIO10~15 low)
…
# sudo modprobe i2c_i801
# sudo modprobe gpio_ich