Joy-it RB-P-XPLR-SET handleiding

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Joy-it

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Handleiding

# Load libraries

from machine import Pin, SPI

import ST7735

import time

import lcd_gfx

# Initialization of GPIO16 as input and GPIO17 as output

trig = Pin(17, Pin.OUT)

echo = Pin(16, Pin.IN, Pin.PULL_DOWN)

# Initialize LCD

spi = SPI(0, baudrate=8000000, polarity=0, phase=0, sck=Pin(18), mosi=Pin(19),

miso=Pin(16))

lcd = ST7735.ST7735(spi, rst=6, ce=17, dc=3)

backlight = Pin(2, Pin.OUT)

backlight.high()

lcd.reset()

lcd.begin()

lcd.ll_screen(lcd.rgb_to_565(255, 255, 255))

def translate(value, leftMin, leftMax, rightMin, rightMax):

# Figure out how 'wide' each range is

leftSpan = leftMax - leftMin

rightSpan = rightMax - rightMin

# Convert the left range into a 0-1 range (oat)

valueScaled = oat(value - leftMin) / oat(leftSpan)

# Convert the 0-1 range into a value in the right range.

return rightMin + (valueScaled * rightSpan)

# Endless loop for measuring the distance

while True:

# Distance measurement is started using the 10us trigger signal

trig.value(0)

time.sleep(0.1)

trig.value(1)

# Now wait at the echo input until the signal has been activated

# Then the time is measured for how long it remains activated

time.sleep_us(2)

trig.value(0)

while echo.value()==0:

pulse_start = time.ticks_us()

while echo.value()==1:

pulse_end = time.ticks_us()

pulse_duration = pulse_end - pulse_start

SUMMARY: In our first project, we measure distances with the ultrasonic sensor and visualize the measured distance by filling the graphic on the TFT display

to a greater or lesser extent. In our example, we fill the display completely from a measured distance of 100 cm.

Distance measurement

Auxiliary function for adjusting the

value range

Initialization of the ultrasonic

sensor and the TFT display

Bekijk gratis de handleiding van Joy-it RB-P-XPLR-SET, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.