-
Notifications
You must be signed in to change notification settings - Fork 1
/
code.py
271 lines (235 loc) · 7.14 KB
/
code.py
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
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
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
189
190
191
192
193
194
195
196
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
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
#
# circuitpy-compass (code.py)
#
# This application renders a simulated magnetic compass on an embedded display. The input is a single
# integer indicating what heading to display in the range (0,359).
#
# Copyright (C) 2021 Dan Stieglitz
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
#
import usb_cdc
import displayio
import board
import time
from adafruit_gizmo import tft_gizmo
from adafruit_display_shapes.rect import Rect
from adafruit_display_shapes.line import Line
from adafruit_display_text import label
from adafruit_bitmap_font import bitmap_font
# use built in display (MagTag, PyPortal, PyGamer, PyBadge, CLUE, etc.)
# see guide for setting up external displays (TFT / OLED breakouts, RGB matrices, etc.)
# https://learn.adafruit.com/circuitpython-display-support-using-displayio/display-and-display-bus
display = tft_gizmo.TFT_Gizmo()
uart = usb_cdc.data
#print(uart.connected)
DISPLAY_WIDTH = 240
DISPLAY_HEIGHT = 240
# try uncommenting different font files if you like
font_file = "/Helvetica-Bold-16.bdf"
# font_file = "fonts/Junction-regular-24.pcf"
# Set text, font, and color
text = "N"
font = bitmap_font.load_font(font_file)
# color = 0xFF00FF
color = 0xFFFFFF
# How many degrees are visible on the display
tot_visible_degrees = 90
# pixels per degree heading
ppd = DISPLAY_WIDTH / tot_visible_degrees
tick_pad = 40
tick_30_height = 40
tick_10_height = 20
tick_5_height = 10
tick_30_width = 6
tick_10_width = 4
tick_5_width = 2
MESSAGE=0x0018fd
ERROR=0xfd1800
def msg(text, color=MESSAGE):
heading_label = label.Label(font, text=text, color=color, scale=1)
heading_label.anchor_point = (0.5, 0.5)
heading_label.anchored_position = (DISPLAY_WIDTH / 2, DISPLAY_HEIGHT / 2)
display.show(heading_label);
msg("Loading...",color=MESSAGE)
def string_width(text, font):
w = 0
for c in text:
g = font.get_glyph(ord(c))
w = w + g.width
return w
def create_group(text, visible_degrees=30, scale=4, color=0xFFFFFF):
group = displayio.Group()
heading_label = label.Label(font, text=text, color=color, scale=scale)
heading_label.anchor_point = (0.5, 0.5)
heading_label.x = -int(string_width(text, font) * scale / 2)
heading_label.y = int(DISPLAY_WIDTH / 2)
group.append(heading_label)
for i in range(visible_degrees):
if i % 30 == 0:
rect = Rect(
int(i * ppd),
int(DISPLAY_HEIGHT / 2) + tick_pad,
tick_30_width,
tick_30_height,
fill=color,
)
group.append(rect)
elif i % 10 == 0:
rect = Rect(
int(i * ppd),
int(DISPLAY_HEIGHT / 2) + tick_pad + (tick_pad - tick_10_height),
tick_10_width,
tick_10_height,
fill=color,
)
group.append(rect)
elif i % 5 == 0:
rect = Rect(
int(i * ppd) + 1,
int(DISPLAY_HEIGHT / 2) + tick_pad + (tick_pad - tick_5_height),
tick_5_width,
tick_5_height,
fill=color,
)
group.append(rect)
return group
compass = displayio.Group()
group_data = [
("N", 4),
("3", 2),
("6", 2),
("E", 4),
("12", 2),
("15", 2),
("S", 4),
("21", 2),
("24", 2),
("W", 4),
("30", 2),
("33", 2),
]
group_data.reverse()
# Helper method to wrap index calculations around the length of the array
def circ_index(idx, tot=len(group_data)):
if idx >= tot - 1:
return idx - tot
elif idx < 0:
return tot + idx
else:
return idx
# Convert degrees to the group index
def to_index(degrees):
return int((360-degrees) / 30) - 1
def to_degrees(index):
return 360 - (circ_index(index + 1) * 30)
#
# Create tiles
#
x=0
left=330
pad=2
pad_px = -int((30*pad) *ppd)
# adjust for extra groups and alignment
compass.x = pad_px
#for i, g in enumerate(group_data):
# cap the ends with an extra couple of groups to simulate a round compass
for i in range(-pad,len(group_data)+pad):
#print(i)
#print(circ_index(i))
g = group_data[circ_index(i)]
g_ = create_group(g[0], scale=g[1])
g_.x = x
compass.append(g_)
x = x + int(30 * ppd)
updating = False
# Simulate the supplied compass heading
def heading(degrees, compass=compass):
if degrees < 0 or degrees > 359:
msg("Bad Heading",color=ERROR)
global updating
global left
updating = True
# clear the existing configuration
# t = len(compass)
# for i in range(0,t):
# compass.pop()
#print("after clearing="+str(len(compass)))
# find the index of the group that contains the desired heading
index = to_index(degrees)
#print("index="+str(index))
#left=to_degrees(circ_index(index-2))
#print("left="+str(left))
midpoint=left-int(tot_visible_degrees/2)
if midpoint < 0:
midpoint = 360 + midpoint
#print("midpoint="+str(midpoint))
right=midpoint-int(tot_visible_degrees/2)
if right < 0:
right = 360 + right
#print("right="+str(right))
# calculate the number of pixels we need to move the groups to show the
# correct heading
offset = int((degrees-midpoint)*ppd)
# print("offset="+str(offset))
compass.x = offset + pad_px
# x = offset
# else:
# i = circ_index(index-2)
# # print("i="+str(i))
# for n in range(5):
# l = circ_index(i+n,len(compass))
# # print("l="+str(l)+" at "+str(x))
# #g_ = groups[l]
# #g_.x = x
# #compass.append(g_)
# #x = x + int(30 * ppd)
# compass.append(Line(int(DISPLAY_WIDTH / 2),0,int(DISPLAY_WIDTH / 2),DISPLAY_HEIGHT,0xaaaaaa))
# cts = label.Label(font, text=str(degrees), color=color, scale=1)
# cts.anchor_point = (0.5, 0.5)
# cts.anchored_position = (DISPLAY_WIDTH / 2, 50)
# # compass.append(cts)
updating = False
compass.y = compass.y - 30
display.show(compass)
cur_head = 0
heading(127)
def test_loop():
for i in range(0,359):
heading(i)
time.sleep(0.001)
def main_loop():
i = 0
global cur_head
global updating
try:
data = uart.readline()
p = data.split()
key = p[0]
#print(key)
val = int(p[1])
print(str(val))
i = i + 1
if key == b'HDG':
if not updating:
print("updating to "+str(val))
cur_head = val
heading(cur_head)
except Exception as e:
pass
#msg(str(e),color=ERROR)
while True:
main_loop()
pass
# test_loop()