All posts by admin

In this video I show how to use both cores on the Raspberry Pi Pico W. We will explore an example using threading where we will operate 2 LED and a servo.

from machine import Pin
import time
import _thread
import SERVO

greenPin=14
redPin=15
servoPin=17

LED=""

redLED=Pin(redPin,Pin.OUT)
greenLED=Pin(greenPin,Pin.OUT)

delOn=.1
delOff=.1
myServo=SERVO.servo(servoPin)
running =True

def othCore(del1,del2):
    global LED
    while True:
        if LED=="RED":
            redLED.value(1)
            time.sleep(del1)
            redLED.value(0)
            time.sleep(del2)
        if LED=="GREEN":
            greenLED.value(1)
            time.sleep(del1)
            greenLED.value(0)
            time.sleep(del2)
_thread.start_new_thread(othCore,(delOn,delOff))
time.sleep(.25)
while True:
    LED="RED"
    for i in range(0,180,1):
        myServo.pos(i)
        time.sleep(.01)
    LED="GREEN"
    for i in range(180,0,-1):
        myServo.pos(i)
        time.sleep(.01)

from machine import Pin

import time

import _thread

import SERVO

greenPin=14

redPin=15

servoPin=17

LED=""

redLED=Pin(redPin,Pin.OUT)

greenLED=Pin(greenPin,Pin.OUT)

delOn=.1

delOff=.1

myServo=SERVO.servo(servoPin)

running =True

def othCore(del1,del2):

global LED

while True:

if LED=="RED":

redLED.value(1)

time.sleep(del1)

redLED.value(0)

time.sleep(del2)

if LED=="GREEN":

greenLED.value(1)

time.sleep(del1)

greenLED.value(0)

time.sleep(del2)

_thread.start_new_thread(othCore,(delOn,delOff))

time.sleep(.25)

while True:

LED="RED"

for i in range(0,180,1):

myServo.pos(i)

time.sleep(.01)

LED="GREEN"

for i in range(180,0,-1):

myServo.pos(i)

time.sleep(.01)

MicroPython, Raspberry Pi Pico

Servo Library for the Raspberry Pi Pico W in MicroPython

April 23, 2024 admin

In this lesson we demonstrate how to create a custom library on the Raspberry Pi Pico W to control a servo. We create a servo class, and then show how to use it as a library in future programs.

class servo:
    def __init__(self,sPin):
        import machine
        self.servoPin=sPin
        self.obj=machine.PWM(machine.Pin(self.servoPin))
        self.obj.freq(50)
    
    def pos(self,angle):
        writeVal=6553/180*angle+1638
        self.obj.duty_u16(int(writeVal))

class servo:

def __init__(self,sPin):

import machine

self.servoPin=sPin

self.obj=machine.PWM(machine.Pin(self.servoPin))

self.obj.freq(50)

def pos(self,angle):

writeVal=6553/180*angle+1638

self.obj.duty_u16(int(writeVal))

MicroPython, Raspberry Pi Pico

How to Write Modular Code With Micropython Functions

March 19, 2024 admin

In this lesson we show how to write modular code in micropython. We demonstrate this with a simple example of how to calculate parameters of interest for a given rectangle. For your convenience, the code developed in the video is presented below. Enjoy!

def rectSolve(len,wid):
    #global area,perimeter,diagonal
    area=rectArea(len,wid)
    perimeter=rectPerimeter(len,wid)
    diagonal=rectDiagonal(len,wid)
    return area,perimeter,diagonal

def rectArea(len,wid):
    area=len*wid
    return area

def rectPerimeter(len,wid):
    perimeter=2*len+2*wid
    return perimeter

def rectDiagonal(len,wid):
    diag=(len**2+wid**2)**(1/2)
    return diag
   
while True:
    l=float(input("What is Length of your Rectangle? "))
    w=float(input("what is the Width of your Rectuangle? "))
    a,p,d = rectSolve(l,w)
    print("Your Rectangle Information: ")
    print("Area: ",a)
    print("Perimeter: ",p)
    print("Diagonal: ",d)
    print()

def rectSolve(len,wid):

#global area,perimeter,diagonal

area=rectArea(len,wid)

perimeter=rectPerimeter(len,wid)

diagonal=rectDiagonal(len,wid)

return area,perimeter,diagonal

def rectArea(len,wid):

area=len*wid

return area

def rectPerimeter(len,wid):

perimeter=2*len+2*wid

return perimeter

def rectDiagonal(len,wid):

diag=(len**2+wid**2)**(1/2)

return diag

while True:

l=float(input("What is Length of your Rectangle? "))

w=float(input("what is the Width of your Rectuangle? "))

a,p,d = rectSolve(l,w)

print("Your Rectangle Information: ")

print("Area: ",a)

print("Perimeter: ",p)

print("Diagonal: ",d)

print()

MicroPython, Raspberry Pi Pico

Calibrating Joystick to Show Positional Angle in MicroPython on the Raspberry Pi Pico W

March 5, 2024 admin

In this Video Lesson we show how to calibrate a joystick to report Angular Position. We do this using MicroPython on a Raspberry Pi Pico W. For your convenience, the code is included below.

import machine
import time
import math
hPin=27
vPin=26
hJoy= machine.ADC(hPin)
vJoy= machine.ADC(vPin)
while True:
    hVal=hJoy.read_u16()
    vVal=vJoy.read_u16()
    
    hCal=int(-.00306*hVal+100.766)
    vCal=int(.00306*vVal-100.766)
    
    deg=math.atan2(vCal,hCal)*360/2/math.pi
    if hCal==0:
        hCal=1
    if deg<0:
        deg=deg+360
    
    mag=math.sqrt(hCal**2+vCal**2)
    if mag<=4:
        hCal=0
        vCal=0
    
    print(hCal,vCal,deg)
    time.sleep_ms(200)

import machine

import time

import math

hPin=27

vPin=26

hJoy= machine.ADC(hPin)

vJoy= machine.ADC(vPin)

while True:

hVal=hJoy.read_u16()

vVal=vJoy.read_u16()

hCal=int(-.00306*hVal+100.766)

vCal=int(.00306*vVal-100.766)

deg=math.atan2(vCal,hCal)*360/2/math.pi

if hCal==0:

hCal=1

if deg<0:

deg=deg+360

mag=math.sqrt(hCal**2+vCal**2)

if mag<=4:

hCal=0

vCal=0

print(hCal,vCal,deg)

time.sleep_ms(200)

Uncategorized

Calibrating a Joystick on the Raspberry Pi Pico W in MicroPython

February 27, 2024 admin

In this lesson we show how to get intuitive calibrated results from a joystick, connected to a Raspberry Pi Pico W, using microPython. This lesson will make it easy to incorporate a joystick into Pico W projects.

For your convenience, the code we develop in the video above is included below.

import machine
import time
import math
hPin=27
vPin=26
hJoy= machine.ADC(hPin)
vJoy= machine.ADC(vPin)
while True:
    hVal=hJoy.read_u16()
    vVal=vJoy.read_u16()
    
    hCal=int(-.00306*hVal+100.766)
    vCal=int(.00306*vVal-100.766)
    
    mag=math.sqrt(hCal**2+vCal**2)
    if mag<=4:
        hCal=0
        vCal=0
    
    print(hCal,vCal)
    time.sleep_ms(200)

import machine

import time

import math

hPin=27

vPin=26

hJoy= machine.ADC(hPin)

vJoy= machine.ADC(vPin)

while True:

hVal=hJoy.read_u16()

vVal=vJoy.read_u16()

hCal=int(-.00306*hVal+100.766)

vCal=int(.00306*vVal-100.766)

mag=math.sqrt(hCal**2+vCal**2)

if mag<=4:

hCal=0

vCal=0

print(hCal,vCal)

time.sleep_ms(200)

Technology Tutorials

All posts by admin

MicroPython MultiCore Programming on the Raspberry Pi Pico Using Threading

Servo Library for the Raspberry Pi Pico W in MicroPython

How to Write Modular Code With Micropython Functions

Calibrating Joystick to Show Positional Angle in MicroPython on the Raspberry Pi Pico W

Calibrating a Joystick on the Raspberry Pi Pico W in MicroPython

Making The World a Better Place One High Tech Project at a Time. Enjoy!