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Add support of drawing text #3

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260 changes: 260 additions & 0 deletions ssd1306/font.py
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,260 @@
# Originally from https://github.com/guyc/py-gaugette/blob/master/gaugette/font5x8.py

cols = 5
rows = 8
bytes = [
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27 changes: 27 additions & 0 deletions ssd1306/ssd1306.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@
# THE SOFTWARE.

import pyb
import font

# Constants
DISPLAYOFF = 0xAE
Expand Down Expand Up @@ -185,3 +186,29 @@ def contrast(self, contrast):
self.write_command(SETCONTRAST)
self.write_command(contrast)

def draw_text(self, x, y, string, size=1, space=1):
def pixel_x(char_number, char_column, point_row):
char_offset = x + char_number * size * font.cols + space * char_number
pixel_offset = char_offset + char_column * size + point_row
return self.columns - pixel_offset

def pixel_y(char_row, point_column):
char_offset = y + char_row * size
return char_offset + point_column

def pixel_mask(char, char_column, char_row):
char_index_offset = ord(char) * font.cols
return font.bytes[char_index_offset + char_column] >> char_row & 0x1

pixels = (
(pixel_x(char_number, char_column, point_row),
pixel_y(char_row, point_column),
pixel_mask(char, char_column, char_row))
for char_number, char in enumerate(string)
for char_column in range(font.cols)
for char_row in range(font.rows)
for point_column in range(size)
for point_row in range(1, size + 1))

for pixel in pixels:
self.set_pixel(*pixel)