print('This tool shows the character map of your LCD on the display.')
print('Press ctrl+c at any time to abort.\n')
page = 0
chars_per_page = rows * cols
try:
while True:
page_start = page * chars_per_page
page_end = page_start + chars_per_page
if page_end > 256:
page_end = 256
lcd.clear()
print('Displaying page %d (characters %d-%d).' %
(page, page_start, page_end - 1))
for i in range(page_start, page_end):
if i < 255:
lcd.write_string(unichr(i))
else:
lcd.write_string(unichr(i))
safe_input('Press <ENTER> to exit.')
lcd.clear()
sys.exit(0)
page += 1
safe_input('Press <ENTER> to continue.')
except KeyboardInterrupt:
print('Aborting.')
lcd.clear()
print('This tool shows the character map of your LCD on the display.')
print('Press ctrl+c at any time to abort.\n')
page = 0
chars_per_page = rows * cols
try:
while True:
page_start = page * chars_per_page
page_end = page_start + chars_per_page
if page_end > 256:
page_end = 256
lcd.clear()
print('Displaying page %d (characters %d-%d).' %
(page, page_start, page_end - 1))
for i in range(page_start, page_end):
if i < 255:
lcd.write_string(unichr(i))
else:
lcd.write_string(unichr(i))
safe_input('Press <ENTER> to exit.')
lcd.clear()
sys.exit(0)
page += 1
safe_input('Press <ENTER> to continue.')
except KeyboardInterrupt:
print('Aborting.')
lcd.clear()
try:
unichr = unichr
except NameError:
unichr = chr
lcd = CharLCD(address=0x38, port=1, cols=20, rows=4, dotsize=8)
input('Display should be blank. ')
lcd.cursor_mode = CursorMode.blink
input('The cursor should now blink. ')
lcd.cursor_mode = CursorMode.line
input('The cursor should now be a line. ')
lcd.write_string('Hello world!')
input('"Hello world!" should be on the LCD. ')
assert lcd.cursor_pos == (0, 12), 'cursor_pos should now be (0, 12)'
lcd.cursor_pos = (1, 0)
lcd.write_string('2')
lcd.cursor_pos = (2, 0)
lcd.write_string('3')
lcd.cursor_pos = (3, 0)
lcd.write_string('4')
assert lcd.cursor_pos == (3, 1), 'cursor_pos should now be (3, 1)'
input('Lines 2, 3 and 4 should now be labelled with the right numbers. ')
lcd.clear()
input('Display should now be clear, cursor should be at initial position. ')
unichr = unichr
except NameError:
unichr = chr
lcd = CharLCD(address=0x38, port=1, cols=20, rows=4, dotsize=8)
input('Display should be blank. ')
lcd.cursor_mode = CursorMode.blink
input('The cursor should now blink. ')
lcd.cursor_mode = CursorMode.line
input('The cursor should now be a line. ')
lcd.write_string('Hello world!')
input('"Hello world!" should be on the LCD. ')
assert lcd.cursor_pos == (0, 12), 'cursor_pos should now be (0, 12)'
lcd.cursor_pos = (1, 0)
lcd.write_string('2')
lcd.cursor_pos = (2, 0)
lcd.write_string('3')
lcd.cursor_pos = (3, 0)
lcd.write_string('4')
assert lcd.cursor_pos == (3, 1), 'cursor_pos should now be (3, 1)'
input('Lines 2, 3 and 4 should now be labelled with the right numbers. ')
lcd.clear()
input('Display should now be clear, cursor should be at initial position. ')
unichr = unichr
except NameError:
unichr = chr
lcd = CharLCD(address=0x3F, port=1, cols=16, rows=2, dotsize=8)
input('Display should be blank. ')
lcd.cursor_mode = CursorMode.blink
input('The cursor should now blink. ')
lcd.cursor_mode = CursorMode.line
input('The cursor should now be a line. ')
lcd.write_string('Hello world!')
input('"Hello world!" should be on the LCD. ')
assert lcd.cursor_pos == (0, 12), 'cursor_pos should now be (0, 12)'
lcd.cursor_pos = (1, 0)
lcd.write_string('2')
assert lcd.cursor_pos == (1, 1), 'cursor_pos should now be (2, 1)'
input('Lines 2, should now be labelled with the right number. ')
lcd.clear()
input('Display should now be clear, cursor should be at initial position. ')
lcd.cursor_pos = (0, 5)
lcd.write_string('12345')
input('The string should have a left offset of 5 characters. ')
