Cours:SaéSBC robotAutonome

pi5 et gpio

cat /sys/kernel/debug/gpio

utiliser libgpiod !!

pi5 et pwm

• config : modifier le fichier /boot/firmware/config.txt

dtoverlay=pwm-2chan,pin=18,pin2=19

• vérif :

dtoverlay=pwm-2chan,pin=18,pin2=19

• https://gist.github.com/Gadgetoid/b92ad3db06ff8c264eef2abf0e09d569
• https://community.element14.com/products/raspberry-pi/m/files/148385
• https://forums.raspberrypi.com/viewtopic.php?t=359251

• pwmchip2
  • channel 2 => gpio18
    • echo 2 > /sys/class/pwm/pwmchip2/export
    • modifier duty_cyle et period
  • channel 3 => gpio19
    • echo 3 > /sys/class/pwm/pwmchip2/export
    • modifier duty_cyle et period

tfmini

• https://github.com/TFmini/TFmini-I2C-MasterExample_Arduino/blob/master/TFminiReadData/TFminiReadData.ino