Newer
Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
<!DOCTYPE html>
<html lang="en-us">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="generator" content="GitLab Pages">
<meta name="description" content="Fab Academy documentation site for Charlotte Fab-C">
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no" />
<link rel="stylesheet" href="../assets/css/main.css" />
<title>Charlotte Fab-C - Fab Academy</title>
</head>
<body class="is-preload">
<!-- Wrapper -->
<div id="wrapper">
<!-- Main -->
<div id="main">
<div class="inner">
<!-- Header -->
<header id="header">
<a href="../index.html" class="logo"><strong>Charlotte - FabLab de Charleroi</strong> Fab Academy website</a>
<ul class="icons">
<li><a href="https://www.facebook.com/littlebelge" class="icon brands fa-facebook-f" target="_blank"><span class="label">Facebook</span></a></li>
<li><a href="https://www.instagram.com/little.belge/" class="icon brands fa-instagram" target="_blank"><span class="label">Instagram</span></a></li>
<li><a href="https://gitlab.fabcloud.org/charlotte-vandenbulcke" class="icon brands fa-gitlab" target="_blank"><span class="label">Gitlab</span></a></li>
</ul>
</header>
<!-- Section -->
<section id="banner">
<div class="content">
<header class="main">
<h2>6. Embedded Programming</h2>
</header>
<section>
Charlotte Vandenbulcke
committed
<p>This week we programmed the Quentorres, tried another programming language and browsed through a data sheet.</p>
</section>
<hr>
<section>
<h3>Group assignment</h3>
Charlotte Vandenbulcke
committed
<p>Browsing through a data sheet and comparing the performance and development workflows for other architectures were on our to-do list.</p>
Charlotte Vandenbulcke
committed
<h4>Seeed Studio XIAO RP2040</h4>
<span class="image object">
<img src="../images/xinfront.jpg" alt="..." />
Charlotte Vandenbulcke
committed
</span>
Charlotte Vandenbulcke
committed
<p>
<ul>
<li>Powerful MCU: Dual-core ARM Cortex M0+ processor, flexible clock running up to 133 MHz</li>
<li>Rich on-chip resources: 264KB of SRAM, and 2MB of on-board Flash memory</li>
<li>Flexible compatibility: Support Micropython/Arduino/CircuitPython</li>
<li>Easy project operation: Breadboard-friendly & SMD design, no components on the back</li>
<li>Small size: As small as a thumb(20x17.5mm) for wearable devices and small projects.</li>
<li>Multiple interfaces: 11 digital pins, 4 analog pins, 11 PWM Pins,1 I2C interface, 1 UART interface, 1 SPI interface, 1 SWD Bonding pad interface.</li>
Charlotte Vandenbulcke
committed
</ul>
</p>
<span class="image object">
Charlotte Vandenbulcke
committed
<img src="../images/xinpin.jpg" alt="..." />
</span>
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
<h5>
Specifications
</h5>
<table>
<thead>
<tr>
<th scope="col">Item</th>
<th scope="col">Value</th>
</tr>
</thead>
<tbody>
<tr>
<th scope="row">CPU</th>
<td>Dual-core ARM Cortex M0+ processor up to 133MHz</td>
</tr>
<tr>
<th scope="row">Flash Memory</th>
<td>2MB</td>
</tr>
<tr>
<th scope="row">SRAM</th>
<td>264KB</td>
</tr>
<tr>
<th scope="row">Digital I/O Pins</th>
<td>11</td>
</tr>
<tr>
<th scope="row">Analog I/O Pins</th>
<td>4</td>
</tr>
<tr>
<th scope="row">PWM Pins</th>
<td>11</td>
</tr>
<tr>
<th scope="row">I2C interface</th>
<td>1</td>
</tr>
<tr>
<th scope="row">SPI interface</th>
<td>1</td>
</tr>
<tr>
<th scope="row">UART interface</th>
<td>1</td>
</tr>
<tr>
<th scope="row">Power supply and downloading interface</th>
<td>Type-C</td>
</tr>
<tr>
<th scope="row">Power</th>
<td>3.3V/5V DC</td>
</tr>
<tr>
<th scope="row">Dimensions</th>
<td>20×17.5×3.5mm</td>
</tr>
</tbody>
</table>
<p>In this state, the Seeed Studio has 11 pins free to be used and an in- and/or output.</p>
<p>When we use it in the Quentorres, only 4 pins are left available and the in- and/or output.</p>
<p>Link to our <a href="https://fabacademy.org/2024/labs/fabc/group-assignment/week006/" target="_blank">Group page</a></p>
</section>
<hr>
<section>
<h3>Individual assignment</h3>
<p>We've already programmed the led to blink by pushing the button on the Quentorres on week04.</p>
<span class="image object">
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
<img src="../images/quentorres-programming.jpg" alt="..." />
</span>
<p>This week we went a little further !</p>
<p>First we programmed the 3 leds to blink all at ones every second with Arduino.</p>
<pre>
<code>
//read leds on pin 26, 0 and 1(correspondance seeed studio component)
const int ledPin0 = 26;
const int ledPin1 = 0;
const int ledPin2 = 1;
// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pins as an output.
pinMode(ledPin0, OUTPUT);
pinMode(ledPin1, OUTPUT);
pinMode(ledPin2, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(ledPin0, HIGH); // turn the LEDs on (HIGH is the voltage level)
digitalWrite(ledPin1, HIGH);
digitalWrite(ledPin2, HIGH);
delay(1000); // wait for a second
digitalWrite(ledPin0, LOW); // turn the LEDs off (LOW is the voltage level)
digitalWrite(ledPin1, LOW);
digitalWrite(ledPin2, LOW);
delay(1000); // wait for a second
}
</code>
</pre>
<span class="object">
<video width="600" height="300" controls>
<source src="../images/3LEDs-blinking.mp4" type="video/mp4">
</video>
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
<p>The next step was to use the button again and turn the 3 leds on all at ones by pushing it.</p>
<pre>
<code>
// Defining the pins
const int boutonPin = 27;
const int ledPin0 = 26;
const int ledPin1 = 0;
const int ledPin2 = 1;
void setup() {
// Configure the button as INPUT
pinMode(boutonPin, INPUT);
// Configure the LEDs as OUTPUT
pinMode(ledPin0, OUTPUT);
pinMode(ledPin1, OUTPUT);
pinMode(ledPin2, OUTPUT);
// Starting with the LEDs turned off
digitalWrite(ledPin0, LOW);
digitalWrite(ledPin1, LOW);
digitalWrite(ledPin2, LOW);
}
void loop() {
// Reading the button's state
int etatBouton = digitalRead(boutonPin);
// If the button is pushed
if (etatBouton == HIGH) {
// Turn on the LEDs
digitalWrite(ledPin0, HIGH);
digitalWrite(ledPin1, HIGH);
digitalWrite(ledPin2, HIGH);
} else {
// Turn off the LEDs
digitalWrite(ledPin0, LOW);
digitalWrite(ledPin1, LOW);
digitalWrite(ledPin2, LOW);
}
}
</code>
</pre>
<span class="object">
<video width="600" height="300" controls>
<source src="../images/3LEDs-blink-button2.mp4" type="video/mp4">
</video>
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
<p>Last step, I used the Arduino Serial Monitor to turn on and off the LEDs separately.</p>
<p>For this program, I asked <a href="https://gemini.google.com/app/" target="_blank">Gemini</a> (Google's ChatGPT) for some help (because I'm no good at programming!) and it gave me this code :</p>
<pre>
<code>
// Defining LEDs pins
#define LED_26 26
#define LED_1 1
#define LED_0 0
void setup() {
// Initialize LEDs pins as OUTPUT
pinMode(LED_26, OUTPUT);
pinMode(LED_1, OUTPUT);
pinMode(LED_0, OUTPUT);
// Starting Serial Monitor
Serial.begin(9600);
}
void loop() {
// Declaring the variable that will stock the received character
char c;
// Waiting to receive the character
while (!Serial.available());
// Reading the received character
c = Serial.read();
// The LED that corresponds to the received character lights up
switch (c) {
case '1':
digitalWrite(LED_26, HIGH);
digitalWrite(LED_1, LOW);
digitalWrite(LED_0, LOW);
break;
case '2':
digitalWrite(LED_26, LOW);
digitalWrite(LED_1, HIGH);
digitalWrite(LED_0, LOW);
break;
case '3':
digitalWrite(LED_26, LOW);
digitalWrite(LED_1, LOW);
digitalWrite(LED_0, HIGH);
break;
case '0':
digitalWrite(LED_26, LOW);
digitalWrite(LED_1, LOW);
digitalWrite(LED_0, LOW);
break;
}
}
</code>
</pre>
<p>It results on :
<ul>
<li>turning on LED 26 by writing "1" in the serial monitor,</li>
<li>turning on LED 1 by writing "2" in the serial monitor,</li>
<li>turning on LED 0 by writing "3" in the serial monitor,</li>
<li>turning all LEDs off by writing "0" in the serial monitor.</li>
</ul>
</p>
<p>Here is the prompt I used in Gemini to get the code :
<blockquote>
code arduino serial monitor seeed rp2040 led pin 26, led pin1 and led pin0. When "1" is written in the serial monitor, led pin 26 lights up. When "2" is written in the serial monitor, led pin 1 lights up. When "3" is written in the serial monitor, led pin 0 lights up. When "0" is written in the serial monitor, all 3 leds go out.
</blockquote>
</p>
<span class="image object">
<img src="../images/gemini-prog-test.jpg" alt="..." />
</span>
<br>
<span class="object">
<video width="600" height="300" controls>
<source src="../images/LED-change-serial-monitor.mp4" type="video/mp4">
</video>
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
<p>As little extra, I installed and tried out <a href="https://thonny.org/" target="_blank">Thonny</a> to code in MicroPython.</p>
<p>For that, I followed all the steps of the <a href="https://wiki.seeedstudio.com/XIAO-RP2040-with-MicroPython/" target="_blank">Seeed Studio wiki page MicroPython language</a> to get the RGB LED to blink in "Beautiful colors".</p>
<p>So, after installing the Thonny Editor and connecting the Seeed Studio, it is asked to download the <a href="../files/ws2812.py" target="_blank">ws2812.py</a> library, open it in the Editor and save it on the "Raspberry Pi Pico".</p>
<p>Here is the ws2812.py library content :</p>
<pre>
<code>
import array, time
from machine import Pin
import rp2
# Configure the number of WS2812 LEDs.
#brightness = 0.2
@rp2.asm_pio(sideset_init=rp2.PIO.OUT_LOW, out_shiftdir=rp2.PIO.SHIFT_LEFT, autopull=True,pull_thresh=24)
def ws2812():
T1 = 2
T2 = 5
T3 = 3
wrap_target()
label("bitloop")
out(x, 1) .side(0) [T3 - 1]
jmp(not_x, "do_zero") .side(1) [T1 - 1]
jmp("bitloop") .side(1) [T2 - 1]
label("do_zero")
nop() .side(0) [T2 - 1]
wrap()
class WS2812():
def __init__(self, pin_num, led_count, brightness = 0.5):
self.Pin = Pin
self.led_count = led_count
self.brightness = brightness
self.sm = rp2.StateMachine(0, ws2812, freq=8_000_000, sideset_base=Pin(pin_num))
self.sm.active(1)
self.ar = array.array("I", [0 for _ in range(led_count)])
def pixels_show(self):
dimmer_ar = array.array("I", [0 for _ in range(self.led_count)])
for i,c in enumerate(self.ar):
r = int(((c >> 8) & 0xFF) * self.brightness)
g = int(((c >> 16) & 0xFF) * self.brightness)
b = int((c & 0xFF) * self.brightness)
dimmer_ar[i] = (g<<16) + (r<<8) + b
self.sm.put(dimmer_ar, 8)
time.sleep_ms(10)
def pixels_set(self, i, color):
self.ar[i] = (color[1]<<16) + (color[0]<<8) + color[2]
def pixels_fill(self, color):
for i in range(len(self.ar)):
self.pixels_set(i, color)
def color_chase(self,color, wait):
for i in range(self.led_count):
self.pixels_set(i, color)
time.sleep(wait)
self.pixels_show()
time.sleep(0.2)
def wheel(self, pos):
# Input a value 0 to 255 to get a color value.
# The colours are a transition r - g - b - back to r.
if pos < 0 or pos > 255:
return (0, 0, 0)
if pos < 85:
return (255 - pos * 3, pos * 3, 0)
if pos < 170:
pos -= 85
return (0, 255 - pos * 3, pos * 3)
pos -= 170
return (pos * 3, 0, 255 - pos * 3)
def rainbow_cycle(self, wait):
for j in range(255):
for i in range(self.led_count):
rc_index = (i * 256 // self.led_count) + j
self.pixels_set(i, self.wheel(rc_index & 255))
self.pixels_show()
time.sleep(wait)
</code>
</pre>
<p>Then I had to open a new file and paste this code in it :</p>
<pre>
<code>
from ws2812 import WS2812
import utime
import machine
power = machine.Pin(11,machine.Pin.OUT)
power.value(1)
BLACK = (0, 0, 0)
RED = (255, 0, 0)
YELLOW = (255, 150, 0)
GREEN = (0, 255, 0)
CYAN = (0, 255, 255)
BLUE = (0, 0, 255)
PURPLE = (180, 0, 255)
WHITE = (255, 255, 255)
COLORS = (BLACK, RED, YELLOW, GREEN, CYAN, BLUE, PURPLE, WHITE)
led = WS2812(12,1)#WS2812(pin_num,led_count)
while True:
print("Beautiful color")
for color in COLORS:
led.pixels_fill(color)
led.pixels_show()
utime.sleep(0.2)
</code>
</pre>
<p>Finally, this code has to be uploaded by clicking the "Run current script" button. The location where it will be saved is not important. Both locations are fine.</p>
<p>If it works well, you will see the RGB LED light convert and flash the lights. And the output of the text "Beautiful Color" will as well be displayed in the Shell.</p>
<span class="object">
<video width="600" height="300" controls>
<source src="../images/beautiful-color-microPython.mp4" type="video/mp4">
</video>
</span>
<hr>
<section>
<h3>My journey</h3>
<p></p>
<span class="image object">
<img src="../images/...jpg" alt="..." />
</span>
</section>
<hr>
<section>
<h3>Files and resources</h3>
<p><strong>My files</strong></p>
<ul>
<li><a href="../files/Blink-3-leds.ino" target="_blank">Arduino file 3 leds blinking</a></li>
<li><a href="../files/blink-button-3-leds.ino" target="_blank">Arduino file 3 leds blinking with button pushed</a></li>
<li><a href="../files/3_leds_changing_serial_monitor.ino" target="_blank">Arduino file leds on/off with serial monitor</a></li>
<li><a href="../files/ws2812.py" target="_blank">ws2812.py library for Thonny Editor</a></li>
</ul>
<p><strong>Resources</strong></p>
<ul>
<li><a href="https://wiki.seeedstudio.com" target="_blank">Seeed Studio wiki page</a></li>
<li><a href="https://gemini.google.com/app/" target="_blank">Gemini website</a></li>
<li><a href="https://thonny.org/" target="_blank">Thonny Editor Website</a></li>
<li><a href="https://fabacademy.org/2024/labs/fabc/" target="_blank">Our group page</a></li>
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
</ul>
</section>
</div>
</section>
</div>
</div>
<!-- Sidebar -->
<div id="sidebar">
<div class="inner">
<!-- Menu -->
<nav id="menu">
<header class="major">
<h2>Menu</h2>
</header>
<ul>
<li><a href="../index.html">Homepage</a></li>
<li><a href="../assignments.html">Assignments</a></li>
<li>
<span class="opener">Week per week</span>
<ul>
<li><a href="../assignments/week01.html">1. Project Management</a></li>
<li><a href="../assignments/week02.html">2. Computer Aided Design</a></li>
<li><a href="../assignments/week03.html">3. Computer Controlled Cutting</a></li>
<li><a href="../assignments/week04.html">4. Electronics Production</a></li>
<li><a href="../assignments/week05.html">5. 3D Scanning And Printing</a></li>
<li><a href="../assignments/week06.html">6. Embedded Programming</a></li>
<li><a href="../assignments/week07.html">7. Computer Controlled Machining</a></li>
<li><a href="../assignments/week08.html">8. Electronics Design</a></li>
<li><a href="../assignments/week09.html">9. Output Devices</a></li>
<li><a href="../assignments/week10.html">10. Mechanical Design And Machine Design</a></li>
<li><a href="../assignments/week11.html">11. Input Devices</a></li>
<li><a href="../assignments/week12.html">12. Molding and Casting</a></li>
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
<li><a href="../assignments/week13.html">13. Networking And Communications</a></li>
<li><a href="../assignments/week14.html">14. Interface And Application Programming</a></li>
<li><a href="../assignments/week15.html">15. Wildcard Week</a></li>
<li><a href="../assignments/week16.html">16. Applications And Implications</a></li>
<li><a href="../assignments/week17.html">17. Invention, Intellectual Property And Income</a></li>
<li><a href="../assignments/week18.html">18. Project Development</a></li>
</ul>
</li>
<li><a href="../final-project.html">Final Project</a></li>
<li><a href="../about.html">About Me</a></li>
</nav>
<!-- Footer -->
<footer id="footer">
<p class="copyright">© Charlotte - FabLab de Charleroi. Fab Academy 2024. All rights reserved. Design: <a href="https://html5up.net">HTML5 UP</a>.</p>
</footer>
</div>
</div>
</div>
<!-- Scripts -->
<script src="../assets/js/jquery.min.js"></script>
<script src="../assets/js/browser.min.js"></script>
<script src="../assets/js/breakpoints.min.js"></script>
<script src="../assets/js/util.js"></script>
<script src="../assets/js/main.js"></script>
</body>
</html>