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Peter Hinch 2018-08-13 06:37:12 +01:00
rodzic d8a205d20d
commit 93a7a451ad
2 zmienionych plików z 99 dodań i 13 usunięć
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60
SSD1306/writer.py
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@ -37,6 +37,7 @@ class Writer():
text_col = 0
row_clip = False # Clip or scroll when screen full
col_clip = False # Clip or new line when row is full
wrap = True # Word wrap
@classmethod
def set_textpos(cls, row=None, col=None):
@ -47,12 +48,14 @@ class Writer():
return Writer.text_row, Writer.text_col
@classmethod
def set_clip(cls, row_clip=None, col_clip=None):
def set_clip(cls, row_clip=None, col_clip=None, wrap=None):
if row_clip is not None:
Writer.row_clip = row_clip
if col_clip is not None:
Writer.col_clip = col_clip
return Writer.row_clip, Writer.col_clip
if wrap is not None:
Writer.wrap = wrap
return Writer.row_clip, Writer.col_clip, Writer.wrap
def __init__(self, device, font, verbose=True):
self.device = device
@ -100,8 +103,23 @@ class Writer():
def printstring(self, string, invert=False):
#print('Writer.text_row = ', Writer.text_row)
# word wrapping. Assumes words separated by single space.
rstr = None
if Writer.wrap and self.stringlen(string) > self.screenwidth:
pos = 0
lstr = string[:]
while self.stringlen(lstr) > self.screenwidth:
pos = lstr.rfind(' ')
lstr = lstr[:pos]
if pos > 0:
rstr = string[pos + 1:]
string = lstr
for char in string:
self._printchar(char, invert)
if rstr is not None:
self._printchar('\n')
self.printstring(rstr, invert) # Recurse
def stringlen(self, string):
l = 0
@ -172,14 +190,41 @@ class CWriter(Writer):
def __init__(self,device, font, verbose=True):
super().__init__(device, font, verbose)
self.fgcolor = 1
self.cpos = 0
self.tab = 4
def setcolor(fgcolor, bgcolor):
self.fgcolor = fgcolor
self.bgcolor = bgcolor
def setcolor(self, fgcolor=None, bgcolor=None):
if fgcolor is not None:
self.fgcolor = fgcolor
if bgcolor is not None:
self.bgcolor = bgcolor
return self.fgcolor, self.bgcolor
def _printchar(self, char, invert=False):
def tabsize(self, value=None):
if value is not None:
self.tab = value
return self.tab
def _gchar(self, char):
if char == '\n':
self.cpos = 0
elif char == '\t':
nspaces = self.tab - (self.cpos % self.tab)
if nspaces == 0:
nspaces = self.tab
while nspaces:
nspaces -= 1
self._printchar(' ', recurse=True)
self.glyph = None # All done
return
super()._get_char(char)
def _printchar(self, char, invert=False, recurse=False):
#print('Writer.text_row 1 = ', Writer.text_row)
self._get_char(char)
if recurse:
self._get_char(char)
else:
self._gchar(char)
#print('Writer.text_row 2 = ', Writer.text_row)
if self.glyph is None:
return # All done
@ -212,3 +257,4 @@ class CWriter(Writer):
if drow >= self.screenheight or drow < 0:
break
Writer.text_col += -char_width if usd else char_width
self.cpos += 1

52
SSD1306/writer_tests.py
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@ -44,8 +44,9 @@ def inverse(use_spi=False, soft=True):
square_side = 10
ssd.fill_rect(rhs - square_side, 0, square_side, square_side, 1)
CWriter.set_textpos(0, 0) # In case previous tests have altered it
wri = CWriter(ssd, freesans20, verbose=False)
Writer.set_textpos(0, 0) # In case previous tests have altered it
Writer.set_clip(False, False, False) # Char wrap
wri = Writer(ssd, freesans20, verbose=False)
wri.printstring('Sunday\n')
wri.printstring('12 Aug 2018\n')
wri.printstring('10.30am', True) # Inverse text
@ -59,6 +60,7 @@ def scroll(use_spi=False, soft=True):
ssd.fill_rect(rhs - square_side, 0, square_side, square_side, 1)
Writer.set_textpos(0, 0) # In case previous tests have altered it
Writer.set_clip(False, False, False) # Char wrap
wri = Writer(ssd, freesans20, verbose=False)
wri.printstring('Sunday\n')
wri.printstring('12 Aug 2018\n')
@ -77,6 +79,7 @@ def usd_scroll(use_spi=False, soft=True):
# Only CWriter can do usd
CWriter.invert_display()
CWriter.set_textpos(HEIGHT - 1, WIDTH - 1)
CWriter.set_clip(False, False, False) # Char wrap
wri = CWriter(ssd, freesans20, verbose=False)
wri.printstring('Sunday\n')
@ -97,6 +100,7 @@ def usd(use_spi=False, soft=True):
# Only CWriter can do usd
CWriter.invert_display()
CWriter.set_textpos(HEIGHT - 1, WIDTH - 1)
CWriter.set_clip(False, False, False) # Char wrap
wri = CWriter(ssd, freesans20, verbose=False)
wri.printstring('Sunday\n')
wri.printstring('12 Aug 2018\n')
@ -107,27 +111,29 @@ def usd(use_spi=False, soft=True):
def rjust(use_spi=False, soft=True):
ssd = setup(use_spi, soft) # Create a display instance
Writer.set_textpos(0, 0) # Previous tests may have altered it
Writer.set_clip(False, False, False) # Char wrap
wri = Writer(ssd, freesans20, verbose=False)
my_str = 'Sunday\n'
l = wri.stringlen(my_str)
CWriter.set_textpos(col = WIDTH - l)
Writer.set_textpos(col = WIDTH - l)
wri.printstring(my_str)
my_str = '12 Aug 2018\n'
l = wri.stringlen(my_str)
CWriter.set_textpos(col = WIDTH - l)
Writer.set_textpos(col = WIDTH - l)
wri.printstring(my_str)
my_str = '10.30am'
l = wri.stringlen(my_str)
CWriter.set_textpos(col = WIDTH - l)
Writer.set_textpos(col = WIDTH - l)
wri.printstring(my_str)
ssd.show()
def fonts(use_spi=False, soft=True):
ssd = setup(use_spi, soft) # Create a display instance
Writer.set_textpos(0, 0) # In case previous tests have altered it
Writer.set_clip(False, False, False) # Char wrap
wri = Writer(ssd, freesans20, verbose=False)
wri_f = Writer(ssd, fixed, verbose=False)
wri_f.printstring('Sunday\n')
@ -135,17 +141,51 @@ def fonts(use_spi=False, soft=True):
wri.printstring('10.30am')
ssd.show()
def tabs(use_spi=False, soft=True):
ssd = setup(use_spi, soft) # Create a display instance
CWriter.set_textpos(0, 0) # In case previous tests have altered it
CWriter.set_clip(False, False, False) # Char wrap
wri = CWriter(ssd, fixed, verbose=False)
wri.printstring('1\t2\n')
wri.printstring('111\t22\n')
wri.printstring('1111\t1')
ssd.show()
def usd_tabs(use_spi=False, soft=True):
ssd = setup(use_spi, soft) # Create a display instance
CWriter.invert_display()
CWriter.set_textpos(HEIGHT - 1, WIDTH - 1)
CWriter.set_clip(False, False, False) # Char wrap
wri = CWriter(ssd, fixed, verbose=False)
wri.printstring('1\t2\n')
wri.printstring('111\t22\n')
wri.printstring('1111\t1')
ssd.show()
CWriter.invert_display(False) # For subsequent tests
def wrap(use_spi=False, soft=True):
ssd = setup(use_spi, soft) # Create a display instance
CWriter.set_textpos(0, 0) # In case previous tests have altered it
CWriter.set_clip(False, False, True) # Word wrap
wri = CWriter(ssd, freesans20, verbose=False)
wri.printstring('the quick brown fox jumps over')
ssd.show()
tstr = '''Test assumes a 128*64 (w*h) display. Edit WIDTH and HEIGHT in ssd1306_setup.py for others.
Device pinouts are comments in ssd1306_setup.py.
All tests take two boolean args:
use_spi = False. Set True for SPI connected device
soft=True set False to use hardware I2C/SPI. Hardware option currently fails with official SSD1306 driver.
Available tests:
inverse() Show black on white text.
scroll() Illustrate scrolling
usd() Upside-down display.
usd_scroll() Upside-down scroll test.
rjust() Right justification.
fonts() Two fonts.'''
fonts() Two fonts.
tabs() Tab stops.
usd_tabs() Upside-down tabs.
wrap() Word wrapping'''
print(tstr)