how to change the pulse width of a GPIO pin?

[withr]

In the example of "example4_pwm_lowlevel.py", it said we can add a new pulse to a subcycle. E.g.:

import RPIO.PWM as PWM

GPIO = 17
CHANNEL = 0

PWM.set_loglevel(PWM.LOG_LEVEL_DEBUG)

PWM.setup()
PWM.init_channel(CHANNEL)
PWM.print_channel(CHANNEL)

PWM.add_channel_pulse(CHANNEL, GPIO, 0, 50)
PWM.add_channel_pulse(CHANNEL, GPIO, 100, 50)

The above code will generate a pulse with two high levels, for each level, the width is 50*10us, the subcycle should looks like: --------__,

what if I want change the pulse to --? I don't think we can use PWM.add_channel_pulse(CHANNEL, GPIO, 50, 50), because I feel that will create: ------_, Am I right? how to change the pulse width smoothly?

[mlv]

I use PWM.Servo, as in:

Set the servo period to one million uSec (1S), increments of 5us

(necessary for 25us pulse width)
s=RPIO.PWM.Servo(subcycle_time_us=1000000, pulse_incr_us=5)

Set pulse width to 25us

s.set_servo(18, 25)

This is for a 25us pulse once per second.

On Wed, May 6, 2015 at 4:59 AM, withr notifications@github.com wrote:

In the example of "example4_pwm_lowlevel.py", it said we can add a new
pulse to a subcycle. E.g.:

import RPIO.PWM as PWM

GPIO = 17
CHANNEL = 0

PWM.set_loglevel(PWM.LOG_LEVEL_DEBUG)

PWM.setup()
PWM.init_channel(CHANNEL)
PWM.print_channel(CHANNEL)

PWM.add_channel_pulse(CHANNEL, GPIO, 0, 50)
PWM.add_channel_pulse(CHANNEL, GPIO, 100, 50)

The above code will generate a pulse with two high levels, for each level,
the width is 50*10us, the subcycle should looks like:
--------__,

what if I want change the pulse to --? I don't think we can
use PWM.add_channel_pulse(CHANNEL, GPIO, 50, 50), because I feel that will
create: ------_, Am I right? how to change the pulse width
smoothly?

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