"""generic_agnostic_board pin interface"""
import random
+# Values for sine wave analog output
+# (data points = 20, amplitude=100, frequency=1)
+sine_wave = [
+ 0,
+ 31,
+ 59,
+ 81,
+ 95,
+ 100,
+ 95,
+ 81,
+ 59,
+ 31,
+ 0,
+ -31,
+ -59,
+ -81,
+ -95,
+ -100,
+ -95,
+ -81,
+ -59,
+ -31,
+]
+
+# Values for a square wave analog output
+# (data points = 20, amplitude=100)
+square_wave_int = [
+ 100,
+ -100,
+ 100,
+ -100,
+ 100,
+ -100,
+ 100,
+ -100,
+ 100,
+ -100,
+ 100,
+ -100,
+ 100,
+ -100,
+ 100,
+ -100,
+ 100,
+ -100,
+ 100,
+ -100
+]
+
class Pin:
"""A basic Pin class for use with generic_agnostic_board"""
+
# pin modes
OUT = 0
IN = 1
# pin values
LOW = 0
HIGH = 1
+ # pin pulls
+ PULL_NONE = 0
+ PULL_UP = 1
+ PULL_DOWN = 2
def return_toggle(self):
- """Returns the pin's expected value, toggling between True and False"""
- toggle_state = not self.previous_value
- return toggle_state
+ """Returns the pin's expected value, toggling between True and False"""
+ toggle_state = not self.previous_value
+ return toggle_state
def return_false(self):
- """Returns the pin's expected value, False"""
- return False
+ """Returns the pin's expected value, False"""
+ return False
def return_true(self):
- """Returns the pin's expected value, True"""
- return True
+ """Returns the pin's expected value, True"""
+ return True
def return_random_int(self):
- """Returns a random integer"""
- return random.randint(0, 65535)
+ """Returns a random integer"""
+ return random.randint(0, 65535)
def return_fixed_int_pi(self):
- """Returns the first five digits of Pi, 31415"""
- return 31415
-
- expected_pin_behavior = {
- 'Dx_INPUT_TRUE': return_true,
- 'Dx_INPUT_FALSE': return_false,
- 'Dx_INPUT_TRUE_THEN_FALSE': return_toggle,
- 'Dx_INPUT_TRUE_PULL_UP': return_true,
- 'Dx_INPUT_TRUE_PULL_DOWN': return_true,
- 'Dx_OUTPUT_TRUE': return_true,
- 'Dx_OUTPUT_FALSE': return_true,
- 'Ax_INPUT_RAND_INT': return_random_int
- }
+ """Returns the first five digits of Pi, 31415"""
+ return 31415
+
+ def return_sine_wave(self):
+ """Returns the next value in the sine wave"""
+ if self._wave_idx is None:
+ self._wave_idx = 0
+ else:
+ self._wave_idx = (self._wave_idx + 1) % len(sine_wave)
+ return sine_wave[self._wave_idx]
+
+ def return_square_wave(self):
+ """Returns the next value in the square wave"""
+ if self._wave_idx is None:
+ self._wave_idx = 0
+ else:
+ self._wave_idx = (self._wave_idx + 1) % len(square_wave_int)
+ return square_wave_int[self._wave_idx]
def __init__(self, pin_id=None):
- self.id = pin_id
- self._mode = None
- self.previous_value = None
- self.current_value = None
+ self.id = pin_id
+ self._mode = None
+ self._pull = None
+ self.previous_value = False
+ self.current_value = None
+ self._wave_idx = None
+
+ # mapping of pin definition names to expected behavior
+ self.pin_behavior = {
+ 0: self.return_true, # Dx_INPUT_TRUE
+ 1: self.return_false, # Dx_INPUT_FALSE
+ 2: self.return_true, # Dx_INPUT_TRUE_PULL_UP
+ 3: self.return_true, # Dx_INPUT_TRUE_PULL_DOWN
+ 4: self.return_true, # Dx_OUTPUT
+ 7: self.return_random_int, # Ax_INPUT_RAND_INT
+ 8: self.return_fixed_int_pi, # Ax_INPUT_FIXED_INT_PI
+ 9: self.return_sine_wave, # Ax_OUTPUT_WAVE_SINE
+ 10: self.return_square_wave, # Ax_OUTPUT_WAVE_SAWTOOTH
+ 11: self.return_toggle # Dx_INPUT_TOGGLE
+ }
def init(self, mode=IN, pull=None):
"""Initialize the Pin"""
if self.id is None:
raise RuntimeError("Can not init a None type pin.")
- if pull is not None:
- raise NotImplementedError("Internal pullups and pulldowns not supported")
+ pull = Pin.PULL_NONE if pull is None else pull
+ self._pull = pull
self._mode = mode
def write(self, new_value):
- """Saves the new_value to the pin for subsequent calls to .value"""
- self.previous_value = self.current_value
- self.current_value = new_value
+ """Saves the new_value to the pin for subsequent calls to .value"""
+ self.previous_value = self.current_value
+ self.current_value = new_value
def read(self):
- """Returns the pin's expected value."""
- self.previous_value = self.current_value
- self.current_value = self.expected_pin_behavior.get(self.pin_id)
- return self.current_value
+ """Returns the pin's expected value."""
+ self.previous_value = self.current_value
+ # perform a lookup on the pin_behavior dict to get the value
+ self.current_value = self.pin_behavior.get(self.id)()
+
+ # is pin a pull up and pin is LOW?
+ if self._pull == Pin.PULL_UP and self.current_value == False:
+ self.current_value = False
+ # is pin a pull down and pin is HIGH?
+ if self._pull == Pin.PULL_DOWN and self.current_value == True:
+ self.current_value = False
+ return self.current_value
def value(self, val=None):
"""Set or return the Pin Value"""
"No action for mode {} with value {}".format(self._mode, val)
)
+
# create pin instances for each pin
D0 = Pin(0)
D1 = Pin(1)
D2 = Pin(2)
D3 = Pin(3)
D4 = Pin(4)
-D5 = Pin(5)
# Special "digital" pins
D6 = Pin(6)
# Analog pins
A2 = Pin(9)
A3 = Pin(10)
+D7 = Pin(11)
+
# I2C pins
SDA = Pin()
SCL = Pin()
projects / Adafruit_Blinka-hackapet.git / blobdiff