Hi Leonard, Wich drive are you using? I try with python adafruit and did not work. i can blink with gpio but pwm never work. i use ubuntu precise, bbb,
root@ubuntu-armhf:/home/ubuntu# echo 51 > /sys/class/gpio/export root@ubuntu-armhf:/home/ubuntu# echo "out" > /sys/class/gpio/gpio51/direction /direction root@ubuntu-armhf:/home/ubuntu# echo "low" > /sys/class/gpio/gpio51/direction but can i use the same step with pwm? root@ubuntu-armhf:/home/ubuntu# ls /sys/class/pwm export pwmchip0 pwmchip2 pwmchip3 pwmchip5 pwmchip7 unexport root@ubuntu-armhf:/home/ubuntu# ls /sys/class/pwm/pwmchip0 base device npwm power subsystem uevent I try echo am33xx_pwm > /sys/devices/bone_capemgr.9/slots; echo bone_pwm_P8_19 > /sys/devices/bone_capemgr.9/slots; # EHRPWM2A echo bone_pwm_P8_13 > /sys/devices/bone_capemgr.9/slots; # EHRPWM2B echo bone_pwm_P9_14 > /sys/devices/bone_capemgr.9/slots; # EHRPWM1A echo bone_pwm_P9_16 > /sys/devices/bone_capemgr.9/slots; # EHRPWM1B but i get. root@ubuntu-armhf:/home/ubuntu# ls /sys/devices/ocp.2/pwm_test_* /sys/devices/ocp.2/pwm_test_P8_13.31: modalias power subsystem uevent /sys/devices/ocp.2/pwm_test_P8_19.30: modalias power subsystem uevent /sys/devices/ocp.2/pwm_test_P9_14.32: modalias power subsystem uevent /sys/devices/ocp.2/pwm_test_P9_16.33: modalias power subsystem uevent 2013/10/2 Tux Leonard <[email protected]> > You can use a PWM output to drive your servo. Set the PWM cycle frequency > to 50hz and the duty cycle to 1.5 ms (~7% = center position). Varying the > duty cycle +/- 0.5ms should drive your servo to left and right. > Power the servo by an external power source not the GPIOs of the board. > Am 02.10.2013 15:43 schrieb "서재필" <[email protected]>: > > Hello, BB group~ >> >> I'm figuring out how to control Servo motor by angle information with my >> BB. >> >> I made a tracking sound c++ code and this code get some angle(degree) >> information. And finally i got it with my BB. >> >> The next step is controlling Servo motor by this angle information. >> >> So I'm thinking of 2 methods. >> >> First one is using Arduino(send angle information to Arduino from BB), >> and Second one is BB directly controls a Servo motor. >> >> But I don't know how to use gpio in BB and I wonder 2 methods I >> thought are possible to implement coding by just using c++ in Angstrom >> linux. >> >> Please give me any comments. >> >> It will be great help for me. >> >> Thanks. >> >> >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/groups/opt_out. >> > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > -- Marcus de Vasconcelos Diogo da Silva "Uma montanha até um cego consegue desviar,mas é nas pedras menores que nós muitas vezes tropeçamos e caimos!" -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
