class Scale:
""" A Class to represent SparkFun's HX711 Scale """
@staticmethod
def twosbinarystring_to_integer(value_string, bits):
""" Given a binary string of a number in 2's complement, compute the integer value """
value = int(value_string, 2)
if value & (1 << (bits - 1)) != 0:
value = value - (1 << bits)
return value
def __init__(self,
gain=1,
data_cycles=24,
clock_pin="G16",
data_pin="G15"):
self.gain = gain
self.data_cycles = data_cycles
self.clock_pin = clock_pin
self.data_pin = data_pin
self.clk = Pin(self.clock_pin, mode=Pin.OUT)
self.clk.mode(Pin.OUT)
self.data = Pin(self.data_pin, mode=Pin.IN, pull=Pin.PULL_DOWN)
self.data.mode(Pin.IN)
def read(self):
self.clk.value(0)
wait_iterations = 0
while wait_iterations < 100 and self.data.value() != 0:
wait_iterations += 1
sleep_ms(1)
if wait_iterations >= 100:
raise Exception("ADC Communication Failure")
# Retrieve ADC Reading
observation = []
for i in range(self.data_cycles):
self.clk.toggle()
self.clk.toggle()
observation.append(self.data.value())
# Set ADC Gain for next reading
for i in range(self.gain):
self.clk.toggle()
self.clk.toggle()
ob_string = ''.join([str(i) for i in observation])
ob_value = self.twosbinarystring_to_integer(ob_string, bits=self.data_cycles)
return ob_value
pin.toggle() # test toggle again print(pin()) # test different value settings pin(1) print(pin.value()) pin(0) print(pin.value()) pin.value(1) print(pin()) pin.value(0) print(pin()) # test all getters and setters pin = Pin(pin_map[0], mode=Pin.OUT) # mode print(pin.mode() == Pin.OUT) pin.mode(Pin.IN) print(pin.mode() == Pin.IN) # pull pin.pull(None) print(pin.pull() == None) pin.pull(Pin.PULL_DOWN) print(pin.pull() == Pin.PULL_DOWN) # drive pin.drive(Pin.MED_POWER) print(pin.drive() == Pin.MED_POWER) pin.drive(Pin.HIGH_POWER) print(pin.drive() == Pin.HIGH_POWER) # id print(pin.id() == pin_map[0])
pin.toggle() # test toggle again print(pin()) # test different value settings pin(1) print(pin.value()) pin(0) print(pin.value()) pin.value(1) print(pin()) pin.value(0) print(pin()) # test all getters and setters pin = Pin(pin_map[0], mode=Pin.OUT) # mode print(pin.mode() == Pin.OUT) pin.mode(Pin.IN) print(pin.mode() == Pin.IN) # pull pin.pull(None) print(pin.pull() == None) pin.pull(Pin.PULL_DOWN) print(pin.pull() == Pin.PULL_DOWN) # drive pin.drive(Pin.MED_POWER) print(pin.drive() == Pin.MED_POWER) pin.drive(Pin.HIGH_POWER) print(pin.drive() == Pin.HIGH_POWER) # id print(pin.id() == pin_map[0])
class TM1639():
FONT = {
'0': 0b00111111,
'1': 0b00000110,
'2': 0b01011011,
'3': 0b01001111,
'4': 0b01100110,
'5': 0b01101101,
'6': 0b01111101,
'7': 0b00000111,
'8': 0b01111111,
'9': 0b01101111,
'a': 0b01110111,
'b': 0b01111100,
'c': 0b01011000,
'd': 0b01011110,
'e': 0b01111001,
'f': 0b01110001,
'g': 0b01011111,
'h': 0b01110100,
'i': 0b00010000,
'j': 0b00001110,
'l': 0b00111000,
'n': 0b01010100,
'o': 0b01011100,
'p': 0b01110011,
'r': 0b01010000,
's': 0b01101101,
't': 0b01111000,
'u': 0b00111110,
'y': 0b01101110,
'C': 0b00111001,
'P': 0b01110011,
'U': 0b00111110
}
def __init__(self, dio, clk, stb):
self.dio = Pin(dio, Pin.OUT)
self.clk = Pin(clk, Pin.OUT)
self.stb = Pin(stb, Pin.OUT)
def enable(self, intensity=7):
self.stb.high()
self.clk.high()
self.send_command(0x40)
self.send_command(0x80 | 8 | min(7, intensity))
self.stb.low()
self.send_byte(0xC0)
for i in range(16):
self.send_byte(0x00)
self.stb.high()
def send_command(self, cmd):
self.stb.low()
self.send_byte(cmd)
self.stb.high()
def send_data(self, addr, data):
self.send_command(0x44)
self.stb.low()
self.send_byte(0xC0 | addr)
self.send_byte(data)
self.stb.high()
def send_byte(self, data):
for i in range(8):
self.clk.low()
self.dio.value((data & 1) == 1)
data >>= 1
self.clk.high()
def set_led(self, n, color):
self.send_data((n << 1) + 1, color)
def send_char(self, pos, data, dot=False):
self.send_data(pos << 1, data | (128 if dot else 0))
def set_digit(self, pos, digit, dot=False):
for i in range(0, 6):
self.send_char(i, self.get_bit_mask(pos, digit, i), dot)
def get_bit_mask(self, pos, digit, bit):
return ((self.FONT[digit] >> bit) & 1) << pos
def set_text(self, text):
dots = 0b00000000
pos = text.find('.')
if pos != -1:
dots = dots | (128 >> pos + (8 - len(text)))
text = text.replace('.', '')
self.send_char(7, self.rotate_bits(dots))
text = text[0:8]
text = text[::-1]
text += " " * (8 - len(text))
for i in range(0, 7):
byte = 0b00000000
for pos in range(8):
c = text[pos]
if c == 'c':
byte = (byte | self.get_bit_mask(pos, c, i))
elif c != ' ':
byte = (byte | self.get_bit_mask(pos, c, i))
self.send_char(i, self.rotate_bits(byte))
def receive(self):
temp = 0
self.dio.mode(Pin.IN, pull=Pin.PULL_UP)
for i in range(8):
temp >>= 1
self.clk.low()
if self.dio.value():
temp |= 0x80
self.clk.high()
self.dio.mode(Pin.OUT)
return temp
def get_buttons(self):
keys = 0
self.stb.low()
self.send_byte(0x42)
for i in range(4):
keys |= self.receive() << i
self.stb.high()
return keys
def rotate_bits(self, num):
for i in range(0, 4):
num = self.rotr(num, 8)
return num
def rotr(self, num, bits):
# num &= (2**bits-1)
num &= ((1 << bits) - 1)
bit = num & 1
num >>= 1
if bit:
num |= (1 << (bits - 1))
return num
def convert(self, src, dst, n):
count = 0x01
s = 0x01
for i in range(n):
tmp = src[i]
for j in range(8):
if (i < 8):
index = 2 * j
else:
index = 2 * j + 1
if (tmp & count) == count:
dst[index] = dst[index] | s
else:
dst[index] = dst[index] & (~s)
if (count == 0x80):
count = 0x01
else:
count <<= 1
if s == 0x80:
s = 0x01
else:
s <<= 1
lcd = hx1230.HX1230_SPI(spi, cs, rst)
# draw a triangle pattern
for i in range(108):
lcd.data([255,127,63,31,15,7,3,1])
# backlight on
bl = Pin(4, Pin.OUT, value=1)
# backlight off
bl(0)
# PWM dimming
# on the ESP8266 port there is a machine.PWM
from machine import PWM
# off
bl_pwm = PWM(bl, freq=500, duty=0)
# dim
bl_pwm = PWM(bl, freq=500, duty=512)
# bright
bl_pwm = PWM(bl, freq=500, duty=1024)
# return to logic level output
bl_pwm.deinit()
bl.mode(b1.OUT)
bl(0)
bl(1)
try_pin = "P004"
try_s = "Pin(Pin.cpu.P004, mode=Pin.IN, pull=Pin.PULL_NONE, drive=Pin.LOW_POWER)"
else:
try_pin = "P000"
try_s = "Pin(Pin.cpu.P000, mode=Pin.IN, pull=Pin.PULL_NONE, drive=Pin.LOW_POWER)"
p = Pin(try_pin, Pin.IN)
if str(p) == try_s:
print("OK")
else:
print("NG")
print("exp: " + try_s)
print("out: " + str(p))
p = Pin("SW1", Pin.IN, Pin.PULL_UP)
if p.mode() != 1:
print("mode: NG")
p = Pin("SW1", Pin.IN, pull=Pin.PULL_UP)
if p.pull() != 14:
print("pull: NG")
p = Pin("SW1", mode=Pin.IN, pull=Pin.PULL_UP)
p.init(p.IN, p.PULL_UP)
p.init(p.IN, pull=p.PULL_UP)
p.init(mode=p.IN, pull=p.PULL_UP)
print(p.value())
p.init(p.OUT)
p.init(p.OPEN_DRAIN)
p.low()
print(p.value())