-
Notifications
You must be signed in to change notification settings - Fork 7
/
oled_091.py
278 lines (230 loc) · 8.78 KB
/
oled_091.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
271
272
273
274
275
276
277
278
from os import path
from sys import exit, version_info
from PIL import Image, ImageDraw, ImageFont
try:
from smbus import SMBus
except ImportError:
if version_info[0] < 3:
exit("This library requires python-smbus\nInstall with: sudo "
"apt-get install python-smbus")
elif version_info[0] == 3:
exit("This library requires python3-smbus\nInstall with: sudo "
"apt-get install python3-smbus")
DIR_PATH = path.abspath(path.dirname(__file__))
DefaultFont = (path.join(DIR_PATH, "Fonts/GothamLight.ttf"))
# Fundamental Command Table
SET_CONTRAST = 0x81
DISPLAY_ON = 0xA4
DISPLAY_INVERT = 0xA6
DISPLAY_ON = 0xAE # Off: sleep mode
DISPLAY_OFF = 0xAF # On: Normal Mode
# Address Settting Command Table
MEM_ADD_MODE = 0x20
COLUMN_ADD = 0x21
PAGE_ADD = 0x22
# Hardware Configuration
DISPLAY_START_LINE = 0x40
SEGMENT_REMAP = 0xA0
MUX_RATIO = 0xA8
COM_OUT_SCAN = 0xC0
COM_SCAN_REMAP = 0xC8
DISPLAY_OFFSET = 0xD3
SET_COM_PIN = 0xDA
# Timing and Driving
SET_CLK_DIV = 0xD5
SET_PRE_CHARGE = 0xD9
SET_DESELECT = 0xDB
CHARGE_PUMP = 0x8D
class i2c_interface:
def __init__(self, address=0x3c):
"""
:param address: i2c address of ssd1306
"""
self.bus = SMBus(self.bus_id())
self.address = address
def __del__(self):
self.close_i2c()
def close_i2c(self):
self.bus.close()
def bus_id(self):
"""
:return: Returns SMBUS id of Raspberry Pi
"""
revision = [lines[12:-1] for lines in open('/proc/cpuinfo',
'r').readlines() if
"Revision" in lines[:8]]
revision = (revision ['0000'])[0]
return 1 if int(revision, 16) >= 4 else 0
def i2c_read(self, register=0):
data = self.bus.read_byte_data(self.address, register)
return data
def i2c_write(self, register=DISPLAY_START_LINE, data=0):
# Write a byte to address, register
self.bus.write_byte_data(self.address, register, data)
def i2c_write_block(self, register=DISPLAY_START_LINE, data=None):
if data is None:
data = [40]
self.bus.write_i2c_block_data(self.address, register, data)
class SSD1306(i2c_interface):
def __init__(self, width=128, height=32, address=0x3c):
i2c_interface.__init__(self, address=address)
self.Height = height
self.Width = width
self.Page = height // 8
self.address = address
self._Image = None
self._Image_New = None
self.Draw = None
self.Image_Buf = None
self.NewImage()
self.InitDisplay()
def NewImage(self):
self._Image = Image.new('1', (self.Width, self.Height), "WHITE")
self.Draw = ImageDraw.Draw(self._Image)
def DirImage(self, filename, size=None, cords=(0, 0)):
"""
:param cords: Coordinates of image on display
:param pos: X, Y positions of paste location
:param filename: Image file path
:param size: The requested size in pixels, as a 2-tuple: (width,
height)
:return: None
"""
self._Image_New = Image.open(filename).convert("1")
if not size:
size = (self.Width, self.Height)
self._Image_New = self._Image_New.resize(size)
self._Image.paste(self._Image_New, box=cords)
self.Draw = ImageDraw.Draw(self._Image)
def WriteCommand(self, cmd): # write command
self.i2c_write(register=0x00, data=cmd)
def WriteData(self, data): # write ram
self.i2c_write(register=DISPLAY_START_LINE, data=data)
def InitDisplay(self):
self.WriteCommand(DISPLAY_ON)
self.WriteCommand(DISPLAY_START_LINE)
self.WriteCommand(0xB0) # Page Address
self.WriteCommand(COM_SCAN_REMAP) # Com Output Scan
# Contrast Setting
self.WriteCommand(SET_CONTRAST)
self.WriteCommand(0xFF)
self.WriteCommand(0xA1)
self.WriteCommand(DISPLAY_INVERT)
self.WriteCommand(MUX_RATIO)
self.WriteCommand(0x1F) # Column Start Address
self.WriteCommand(DISPLAY_OFFSET)
self.WriteCommand(0x00)
self.WriteCommand(SET_CLK_DIV)
self.WriteCommand(0xF0)
self.WriteCommand(SET_PRE_CHARGE)
self.WriteCommand(PAGE_ADD)
self.WriteCommand(SET_COM_PIN)
self.WriteCommand(0x02)
self.WriteCommand(SET_DESELECT)
self.WriteCommand(0x49)
self.WriteCommand(CHARGE_PUMP)
self.WriteCommand(0x14)
self.WriteCommand(DISPLAY_OFF)
def NoDisplay(self):
for i in range(0, self.Page):
self.WriteCommand(0xb0 i)
self.WriteCommand(0x00)
self.WriteCommand(0x10)
for j in range(0, self.Width):
self.WriteData(0x00)
def WhiteDisplay(self):
for i in range(0, self.Page):
self.WriteCommand(0xb0 i)
self.WriteCommand(0x00)
self.WriteCommand(0x10)
for j in range(0, self.Width):
self.WriteData(0xff)
def ImgBuffer(self, image):
buf = [0xff] * (self.Page * self.Width)
Img_Mono = image.convert('1')
Img_Width, Img_Height = Img_Mono.size
pixels = Img_Mono.load()
if Img_Width == self.Width and Img_Height == self.Height:
# Horizontal screen
for y in range(Img_Height):
for x in range(Img_Width):
# Set the bits for the column of pixels at the current
# position.
if pixels[x, y] == 0:
buf[x (y // 8) * self.Width] &= ~(1 << (y % 8))
elif Img_Width == self.Width and Img_Height == self.Height:
# Vertical screen
for y in range(Img_Height):
for x in range(Img_Width):
x_pos = y
y_pos = self.Height - x - 1
if pixels[x, y] == 0:
buf[(x_pos int(y_pos / 8) * self.Width)] &= ~(
1 << (y % 8))
for i in range(self.Page * self.Width):
buf[i] = ~buf[i]
return buf
def ShowImage(self):
i_buf = self.ImgBuffer(self._Image)
for i in range(0, self.Page):
self.WriteCommand(0xB0 i) # set page address
self.WriteCommand(0x00) # set low column address
self.WriteCommand(0x10) # set high column address
# write data #
for j in range(0, 128): # self.Width):
self.WriteData(i_buf[j self.Width * i])
self.NewImage()
def PrintText(self, text, cords=(10, 5), Font=DefaultFont,
FontSize=14):
"""
:param text: Text to print
:param cords: Top left Corner (X, Y) cords
:param Font: Font Type
:param FontSize: Size of Font
:return: None
"""
self.Draw.text(cords, text, font=ImageFont.truetype(Font, FontSize))
def DrawRect(self, cords=(0, 0, 127, 31)):
"""
:param cords: X0, X1, Y0, Y1
:return: None
"""
self.Draw.rectangle(cords, outline=0)
def DrawPolygon(self, cords=(1, 2, 3, 4, 5, 6)):
"""
:param cords: Sequence of either 2-tuples like [(x, y), (x, y),
...] or numeric values like [x, y, x, y, ...]
:return: None
"""
self.Draw.polygon(cords)
def DrawPoint(self, cords=(64, 16, 66, 18)):
"""
:param cords: tuple of X, Y coordinates of Points
:return: None
"""
self.Draw.point(cords)
def DrawLine(self, cords=(64, 16, 78, 18)):
"""
Draws a line between the coordinates in the xy list
:param cords: tuple of X, Y coordinates for line
:return: None
"""
self.Draw.line(cords)
def DrawEllipse(self, cords=(64, 16, 78, 18)):
"""
Draws an ellipse inside the given bounding box
:param cords: Four points to define the bounding box
:return: None
"""
self.Draw.ellipse(cords)
def DrawArc(self, cords=(10, 10, 120, 10), start=0, end=90):
"""
Draws an arc (a portion of a circle outline) between the start and
end angles, inside the given bounding box
:param end: Starting angle, in degrees. Angles are measured from 3
o’clock, increasing clockwise.
:param start: Ending angle, in degrees.
:param cords: Four points to define the bounding box
:return: None
"""
self.Draw.arc(cords, start=start, end=end)