def __init__(self, txt_rf_ms, verbose):
self.txt_rf_ms = txt_rf_ms
self.verbose = verbose
self.tmax = 30 # Initial temperature range
self.tmin = 15
self.mode = _NORM
# Enable initial update
self.rf_disp = True
self.rf_txt = True
# Instantiate color mapper
self.mapper = Mapper(self.tmin, self.tmax)
# Instantiate switches
self.timer = Delay_ms(duration=2000) # Long press delay
# Release arg rarg enables calling switch to be identified.
for item in (('X4', self.chmax, 5, self.ar, 0), ('Y1', self.chmax, -5,
self.ar, 1),
('X5', self.chmin, 5, eliza, 2), ('X6', self.chmin, -5,
eliza, 3)):
sw, func, arg, long_func, rarg = item
cs = Switch(Pin(sw, Pin.IN, Pin.PULL_UP))
cs.close_func(self.press, (func, arg))
cs.open_func(self.release, (long_func, rarg))
# Instantiate display
pdc = Pin('X1', Pin.OUT_PP, value=0)
pcs = Pin('X2', Pin.OUT_PP, value=1)
prst = Pin('X3', Pin.OUT_PP, value=1)
# In practice baudrate made no difference to update rate which is
# dominated by interpolation time
spi = SPI(2, baudrate=13_500_000)
verbose and print('SPI:', spi)
ssd = SSD(spi, pcs, pdc, prst) # Create a display instance
ssd.fill(0)
ssd.show()
self.avg = 0.0
# Instantiate PIR temperature sensor
i2c = I2C(2)
pir = AMG88XX(i2c)
pir.ma_mode(True) # Moving average mode
# Run the camera
asyncio.create_task(self.run(pir, ssd))
def read_temperature():
'''Read temperatures from sensor on I2C bus and set the highest detected temperature to variable highest_pixel_value.'''
i2c = machine.I2C(1)
sensor = AMG88XX(i2c)
try:
while True:
highest_pixel_temp = 0
utime.sleep(0.2)
sensor.refresh() #refresh values from all pixels in sensor.
for row in range(8):
for col in range(8):
if sensor[
row,
col] > highest_pixel_temp: #select the highest of the pixel 64 detected temperatures
highest_pixel_value = sensor[row, col]
return highest_pixel_temp
except Exception as e:
print("Temperature read error: " + str(e))
from time import ticks_us, ticks_diff, sleep_ms
from amg88xx import AMG88XX
from helper import busio, dio
# Die 5V-Spannungsversorgung muss aktiviert werden, falls die Wärmebildkamera
# an ein Robotling-Board angeschlossen ist
dio.DigitalOut(16, value=True)
try:
# I2C-Objekt erstellen, 400 kHz Busfrequenz, SCL an Pin 22, SDA and Pin 23
i2c = busio.I2CBus(400000, 22, 23)
# Wärmebildkamera-Treiber starten und etwas warten
amg = AMG88XX(i2c)
sleep_ms(500)
# Beispielbild einlesen, es entspricht einer 1D Liste von 64 (8x8 pixel)
# Temperaturwerten (in °Celsius)
img = list(amg.pixels_64x1)
print("Image:", img)
print()
def find_some_blobs(n):
# Liest `n` Bilder ein und versucht Blobs zu finden. Dazu wird die
# Funktion `find_blobs` aus dem Modul `blob` benutzt; `find_blobs` läuft
# auf dem Mikrokontroller. Die gefundenen Blobs und die mittlere Lauf-
# zeit von `find_blobs` werden ausgegeben.
delta = 0
for i in range(n):
# Bild einlesen
img = list(amg.pixels_64x1)
# Instantiate color mapper
mapper = Mapper(TMIN, TMAX)
# Instantiate display
pdc = machine.Pin('X1', machine.Pin.OUT_PP, value=0)
pcs = machine.Pin('X2', machine.Pin.OUT_PP, value=1)
prst = machine.Pin('X3', machine.Pin.OUT_PP, value=1)
spi = machine.SPI(1)
ssd = SSD1331(spi, pcs, pdc, prst)
ssd.fill(0)
ssd.show()
# Instantiate temperature sensor
i2c = machine.I2C(1)
sensor = AMG88XX(i2c)
sensor.ma_mode(True) # Moving average mode
# Demo use in timer callback. No point in running faster than 10Hz as this is
# the update rate of the chip.
# tim = pyb.Timer(1)
# tim.init(freq=10)
# tim.callback(sensor.refresh)
# Draw color scale at right of display
col = 80
val = TMIN
dt = (TMAX - TMIN) / 32
for row in range(63, -1, -2):
ssd.fill_rect(col, row, 15, 2, ssd.rgb(*mapper(int(val))))
val += dt