Difference between revisions of "Fitlet GPIO usage manual in Linux environment"
From fit-PC wiki
(→GPIO connector Pinout) (change visibility) |
|||
Line 2: | Line 2: | ||
* It provides instructions to install the dkms kernel module to enable GPIO functionality. | * It provides instructions to install the dkms kernel module to enable GPIO functionality. | ||
− | == | + | == Installation == |
+ | $ wget https://fit-iot.com/files/download/fitlet/sw/gpio-fch-dkms_1.01.deb | ||
+ | $ sudo dpkg -i gpio-fch-dkms_1.01.deb | ||
− | + | == GPIO connector Pinout == | |
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | == | + | |
{| class="wikitable" | {| class="wikitable" | ||
! Pin Number | ! Pin Number | ||
Line 125: | Line 114: | ||
|} | |} | ||
− | == | + | == Usage example == |
− | + | $ sudo -i | |
$ modprobe gpio_fch | $ modprobe gpio_fch | ||
$ echo 89 > /sys/class/gpio/export | $ echo 89 > /sys/class/gpio/export | ||
+ | |||
+ | $ echo out > /sys/class/gpio/gpio89/direction | ||
+ | $ echo 1 > /sys/class/gpio/gpio89/value | ||
+ | ## at this point voltage measuring on P-1 (Brown) should give 3.3V | ||
+ | $ echo 0 > /sys/class/gpio/gpio89/value | ||
+ | ## at this point voltage measuring on P-1 (Brown) should give 0.0V | ||
+ | |||
$ echo in > /sys/class/gpio/gpio89/direction | $ echo in > /sys/class/gpio/gpio89/direction | ||
− | $ cat /sys/class/gpio/gpio89/ | + | $ cat /sys/class/gpio/gpio89/value |
− | # cat command will print 0 or 1 depending if voltage measuring on P-1 (Brown) was 0V or 3.3V | + | ## at this point cat command will print 0 or 1 depending if voltage measuring on P-1 (Brown) was 0V or 3.3V |
+ | |||
$ echo 89 > /sys/class/gpio/unexport | $ echo 89 > /sys/class/gpio/unexport |
Revision as of 13:14, 19 June 2019
- This application notes applies to fitlet models running Linux environment.
- It provides instructions to install the dkms kernel module to enable GPIO functionality.
Installation
$ wget https://fit-iot.com/files/download/fitlet/sw/gpio-fch-dkms_1.01.deb $ sudo dpkg -i gpio-fch-dkms_1.01.deb
GPIO connector Pinout
Pin Number | Color Code | GPIO name | Power domain | HW source | Notes |
---|---|---|---|---|---|
1 | Brown | GPIO89 | 3.3V | SoC | |
2 | Red | GPIO132 | 3.3V | SoC | |
3 | Orange | GPIO65 | 3.3V | SoC | |
4 | Yellow | GPIO66 | 3.3V | SoC | |
5 | Green | GPIO29 | 1.5V | SoC | |
6 | Blue | I2C Clock | 3.3V | SoC | |
7 | Purple | I2C Data | 3.3V | SoC | |
8 | Grey | GPIO73 | 3.3V | SoC | |
9 | White | GPIO27 | 1.5V | SoC | |
10 | Black | GPIO28 | 1.5V | SoC | |
11 | Brown | GPIO12 | 3.3V | SoC | |
12 | Red | UART Rx | 3.3V | SuperIO | |
13 | Orange | UART Tx | 3.3V | SuperIO | |
14 | Yellow | GND |
Usage example
$ sudo -i $ modprobe gpio_fch $ echo 89 > /sys/class/gpio/export $ echo out > /sys/class/gpio/gpio89/direction $ echo 1 > /sys/class/gpio/gpio89/value ## at this point voltage measuring on P-1 (Brown) should give 3.3V $ echo 0 > /sys/class/gpio/gpio89/value ## at this point voltage measuring on P-1 (Brown) should give 0.0V $ echo in > /sys/class/gpio/gpio89/direction $ cat /sys/class/gpio/gpio89/value ## at this point cat command will print 0 or 1 depending if voltage measuring on P-1 (Brown) was 0V or 3.3V
$ echo 89 > /sys/class/gpio/unexport