If you provide a link to the source of this that would help. But, basically in your own Python code you would first import the class
Ex: * from source_file import Pca9685* The you could create an instance of this like: * my_servo_control = Pca9685(bus_num, addr_val)* You could need to know the value of bus_num and addr_val to set these. Then you could call the methods as such: *my_servo_control.read_reg(reg_val)* Again, you would need to know what the value of reg_val is to set the 'reg' parameter for the 'read_reg' method. You still need to know where it is getting the '*write_i2c_block_data*' and *'read_i2c_block_data*' methods from though. Perhaps 'import smbus' is missing? https://learn.sparkfun.com/tutorials/python-programming-tutorial-getting-started-with-the-raspberry-pi/experiment-4-i2c-temperature-sensor A course in Python wouldn't hurt. Cheers, Jon On Tue, May 5, 2020 at 1:29 PM Mala Dies <fun...@gmail.com> wrote: > Hello, > > I have a, to me, piece of complicated text in Python3 format. > > Anyway... > > I have been unable to make the conversion of the wrapper to another > Python3 file. > > So, here is the source in case you are interested: > > from time import sleep > > # relevant registers > MODE1 = 0x00 > MODE2 = 0x01 > LED = 0x06 > ALL_LED = 0xFA > PRE_SCALE = 0xFE > > class Pca9685: > def __init__( self, bus, addr ): > self.addr = 0b10000000 | addr > self.bus = bus > self.write_reg( MODE1, 1 << 5 ) # initialize MODE1 register > sleep( 500e-6 ) # wait 500us to allow oscillator to power up > > def read_reg( self, reg ) > return self.read_regs( reg, 1 )[0] > > def write_reg( self, reg, value ): > return self.write_regs( reg, [ value ] ) > > def read_regs( self, reg, count ): > assert reg in range( 0, 256 ) > assert count in range( 1, 257-reg ) > return self.bus.read_i2c_block_data( self.addr, reg, count ) > > def write_regs( self, reg, values ): > assert reg in range( 0, 256 ) > return self.bus.write_i2c_block_data( self.addr, reg, values ) > > def get_pwm( self, output ): > assert output in range( 0, 16 ) > reg = LED + 4 * output > > [ on_l, on_h, off_l, off_h ] = self.read_regs( reg, 4 ) > on = on_l | on_h << 8 > off = off_l | off_h << 8 > > phase = on > duty = ( off - on ) & 0xfff > if off & 0x1000: > duty = 0 > elif on & 0x1000: > duty = 4096 > > return ( duty, phase ) > > def set_pwm( self, output, duty, phase=0 ): > assert duty in range( 0, 4097 ) > assert phase in range( 0, 4096 ) > > if output == 'all': > reg = ALL_LED > else: > assert output in range( 0, 16 ) > reg = LED + 4 * output > > on = phase > off = ( duty + phase ) & 0xfff > if duty == 0: > off |= 0x1000 > elif duty == 4096: > on |= 0x1000 > > on_l = on & 0xff > on_h = on >> 8 > off_l = off & 0xff > off_h = off >> 8 > self.write_regs( reg, [ on_l, on_h, off_l, off_h ] ) > > Now... > > How would I actually use this source to promote a servo movement with the > ServoCape? > > I have tried particular source from different tutorials, the python.org > site, and examples of classes online. > > None really cover the BBB and expansion Capes like this source is listed. > Anyway... > > What steps if any would you take to make a servo move w/ this Cape and > source? > > > - Would I need a Adafruit_BBIO library for GPIO/PWM or a similar > library? > > Seth > > -- > 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 beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/5e42131b-733f-413d-91e9-eb204e204f84%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/5e42131b-733f-413d-91e9-eb204e204f84%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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 beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAG99bkp%3Dx9QNdd_rfPWxhCxWJ9vFHzXjt3PtvsoLsrymO-WNwQ%40mail.gmail.com.
