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gpioinfo
$ gpiodetect
gpiochip0 [pinctrl-bcm2835] (54 lines)
gpiochip1 [raspberrypi-exp-gpio] (8 lines)

$ gpioinfo
gpiochip0 - 54 lines:
line 0: unnamed unused input active-high
line 1: unnamed unused input active-high
line 2: unnamed unused input active-high
line 3: unnamed unused input active-high
line 4: unnamed unused input active-high
line 5: unnamed unused input active-high
line 6: unnamed unused input active-high
line 7: unnamed unused input active-high
line 8: unnamed unused input active-high
line 9: unnamed unused input active-high
line 10: unnamed unused input active-high
line 11: unnamed unused input active-high
line 12: unnamed unused input active-high
line 13: unnamed unused input active-high
line 14: unnamed unused input active-high
line 15: unnamed unused input active-high
line 16: unnamed unused input active-high
line 17: unnamed unused input active-high
line 18: unnamed unused input active-high
line 19: unnamed unused input active-high
line 20: unnamed "klipper" output active-high [used]
line 21: unnamed unused input active-high
line 22: unnamed unused input active-high
line 23: unnamed unused input active-high
line 24: unnamed unused input active-high
line 25: unnamed unused input active-high
line 26: unnamed unused input active-high
line 27: unnamed unused input active-high
line 28: unnamed unused input active-high
line 29: unnamed "led0" output active-high [used]
line 30: unnamed unused input active-high
line 31: unnamed unused input active-high
line 32: unnamed unused input active-high
line 33: unnamed unused input active-high
line 34: unnamed unused input active-high
line 35: unnamed unused input active-high
line 36: unnamed unused input active-high
line 37: unnamed unused input active-high
line 38: unnamed unused input active-high
line 39: unnamed unused input active-high
line 40: unnamed unused input active-high
line 41: unnamed unused input active-high
line 42: unnamed unused input active-high
line 43: unnamed unused input active-high
line 44: unnamed unused input active-high
line 45: unnamed unused input active-high
line 46: unnamed unused input active-high
line 47: unnamed unused input active-high
line 48: unnamed unused input active-high
line 49: unnamed unused input active-high
line 50: unnamed unused input active-high
line 51: unnamed unused input active-high
line 52: unnamed unused input active-high
line 53: unnamed unused input active-high
gpiochip1 - 8 lines:
line 0: unnamed unused input active-high
line 1: unnamed unused input active-high
line 2: unnamed "led1" output active-low [used]
line 3: unnamed unused input active-high
line 4: unnamed unused input active-high
line 5: unnamed unused input active-high
line 6: unnamed unused input active-high
line 7: unnamed unused input active-high
Optional: Hardware PWM
Raspberry Pi's have two PWM channels (PWM0 and PWM1) which are exposed on the header or if not, can be routed to existing gpio pins. The Linux mcu daemon uses the pwmchip sysfs interface to control hardware pwm devices on Linux hosts. The pwm sysfs interface is not exposed by default on a Raspberry and can be activated by adding a line to `/boot/config.txt`:
# Enable pwmchip sysfs interface
dtoverlay=pwm,pin=12,func=4
With the sysfs in place, you can now use either the pwm channel(s) by adding the following piece of configuration to your `printer.cfg`:
RPi microcontroller
PWM0 can be routed to gpio12 and gpio18, PWM1 can be routed to gpio13 and gpio19:
PWM
gpio PIN
Func

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String information

Flags
md-text, read-only
Source string location
docs/RPi_microcontroller.md:block • 38 • (paragraph)
String age
2 years ago
Last updated
a year ago
Source string age
2 years ago
Translation file
docs/locales/en/LC_MESSAGES/RPi_microcontroller.pot, string 31