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Diffstat (limited to 'Adafruit_Python_GPIO/Adafruit_GPIO/PWM.py')
| -rw-r--r-- | Adafruit_Python_GPIO/Adafruit_GPIO/PWM.py | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/Adafruit_Python_GPIO/Adafruit_GPIO/PWM.py b/Adafruit_Python_GPIO/Adafruit_GPIO/PWM.py deleted file mode 100644 index 1e1717a..0000000 --- a/Adafruit_Python_GPIO/Adafruit_GPIO/PWM.py +++ /dev/null @@ -1,128 +0,0 @@ -# Copyright (c) 2014 Adafruit Industries -# Author: Tony DiCola -# -# Permission is hereby granted, free of charge, to any person obtaining a copy -# of this software and associated documentation files (the "Software"), to deal -# in the Software without restriction, including without limitation the rights -# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -# copies of the Software, and to permit persons to whom the Software is -# furnished to do so, subject to the following conditions: -# -# The above copyright notice and this permission notice shall be included in -# all copies or substantial portions of the Software. -# -# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN -# THE SOFTWARE. -import Adafruit_GPIO.Platform as Platform - - -class RPi_PWM_Adapter(object): - """PWM implementation for the Raspberry Pi using the RPi.GPIO PWM library.""" - - def __init__(self, rpi_gpio, mode=None): - self.rpi_gpio = rpi_gpio - # Suppress warnings about GPIO in use. - rpi_gpio.setwarnings(False) - # Set board or BCM pin numbering. - if mode == rpi_gpio.BOARD or mode == rpi_gpio.BCM: - rpi_gpio.setmode(mode) - elif mode is not None: - raise ValueError('Unexpected value for mode. Must be BOARD or BCM.') - else: - # Default to BCM numbering if not told otherwise. - rpi_gpio.setmode(rpi_gpio.BCM) - # Store reference to each created PWM instance. - self.pwm = {} - - def start(self, pin, dutycycle, frequency_hz=2000): - """Enable PWM output on specified pin. Set to intiial percent duty cycle - value (0.0 to 100.0) and frequency (in Hz). - """ - if dutycycle < 0.0 or dutycycle > 100.0: - raise ValueError('Invalid duty cycle value, must be between 0.0 to 100.0 (inclusive).') - # Make pin an output. - self.rpi_gpio.setup(pin, self.rpi_gpio.OUT) - # Create PWM instance and save a reference for later access. - self.pwm[pin] = self.rpi_gpio.PWM(pin, frequency_hz) - # Start the PWM at the specified duty cycle. - self.pwm[pin].start(dutycycle) - - def set_duty_cycle(self, pin, dutycycle): - """Set percent duty cycle of PWM output on specified pin. Duty cycle must - be a value 0.0 to 100.0 (inclusive). - """ - if dutycycle < 0.0 or dutycycle > 100.0: - raise ValueError('Invalid duty cycle value, must be between 0.0 to 100.0 (inclusive).') - if pin not in self.pwm: - raise ValueError('Pin {0} is not configured as a PWM. Make sure to first call start for the pin.'.format(pin)) - self.pwm[pin].ChangeDutyCycle(dutycycle) - - def set_frequency(self, pin, frequency_hz): - """Set frequency (in Hz) of PWM output on specified pin.""" - if pin not in self.pwm: - raise ValueError('Pin {0} is not configured as a PWM. Make sure to first call start for the pin.'.format(pin)) - self.pwm[pin].ChangeFrequency(frequency_hz) - - def stop(self, pin): - """Stop PWM output on specified pin.""" - if pin not in self.pwm: - raise ValueError('Pin {0} is not configured as a PWM. Make sure to first call start for the pin.'.format(pin)) - self.pwm[pin].stop() - del self.pwm[pin] - - -class BBIO_PWM_Adapter(object): - """PWM implementation for the BeagleBone Black using the Adafruit_BBIO.PWM - library. - """ - - def __init__(self, bbio_pwm): - self.bbio_pwm = bbio_pwm - - def start(self, pin, dutycycle, frequency_hz=2000): - """Enable PWM output on specified pin. Set to intiial percent duty cycle - value (0.0 to 100.0) and frequency (in Hz). - """ - if dutycycle < 0.0 or dutycycle > 100.0: - raise ValueError('Invalid duty cycle value, must be between 0.0 to 100.0 (inclusive).') - self.bbio_pwm.start(pin, dutycycle, frequency_hz) - - def set_duty_cycle(self, pin, dutycycle): - """Set percent duty cycle of PWM output on specified pin. Duty cycle must - be a value 0.0 to 100.0 (inclusive). - """ - if dutycycle < 0.0 or dutycycle > 100.0: - raise ValueError('Invalid duty cycle value, must be between 0.0 to 100.0 (inclusive).') - self.bbio_pwm.set_duty_cycle(pin, dutycycle) - - def set_frequency(self, pin, frequency_hz): - """Set frequency (in Hz) of PWM output on specified pin.""" - self.bbio_pwm.set_frequency(pin, frequency_hz) - - def stop(self, pin): - """Stop PWM output on specified pin.""" - self.bbio_pwm.stop(pin) - - -def get_platform_pwm(**keywords): - """Attempt to return a PWM instance for the platform which the code is being - executed on. Currently supports only the Raspberry Pi using the RPi.GPIO - library and Beaglebone Black using the Adafruit_BBIO library. Will throw an - exception if a PWM instance can't be created for the current platform. The - returned PWM object has the same interface as the RPi_PWM_Adapter and - BBIO_PWM_Adapter classes. - """ - plat = Platform.platform_detect() - if plat == Platform.RASPBERRY_PI: - import RPi.GPIO - return RPi_PWM_Adapter(RPi.GPIO, **keywords) - elif plat == Platform.BEAGLEBONE_BLACK: - import Adafruit_BBIO.PWM - return BBIO_PWM_Adapter(Adafruit_BBIO.PWM, **keywords) - elif plat == Platform.UNKNOWN: - raise RuntimeError('Could not determine platform.') |