7-segment Print function doesn't handle multiple periods

[makermelissa]

I'm not sure if this is by design as the AlphaNumeric display handles this fine, but issuing a command like print with multiple dots such as in

import board
import busio
import adafruit_ht16k33.segments as segments

I2C_BUS = busio.I2C(board.SCL, board.SDA)
display = segments.Seg7x4(I2C_BUS)
display.print('0...9')

Results in it printing 0.9

[caternuson]

Not by design, looks like a bug. The second half of this conditional:
https://github.com/adafruit/Adafruit_CircuitPython_HT16K33/blob/master/adafruit_ht16k33/segments.py#L190
doesn't work for the 7 segment, so scroll() is not being called.

Adafruit CircuitPython 3.1.2 on 2019-01-07; Adafruit ItsyBitsy M4 Express with samd51g19
>>> import board, busio
>>> import adafruit_ht16k33.segments as segments
>>> i2c = busio.I2C(board.SCL, board.SDA)
>>> disp = segments.Seg7x4(i2c)
>>> disp.fill(0)
>>> disp._push('.')
>>> disp.show()
>>> disp._get_buffer(7) & 0b01000000
0
>>> 

That same sequence for an instance of Seg14x4 results in a non-zero return:

Adafruit CircuitPython 3.1.2 on 2019-01-07; Adafruit ItsyBitsy M4 Express with samd51g19
>>> import board, busio
>>> import adafruit_ht16k33.segments as segments
>>> i2c = busio.I2C(board.SCL, board.SDA)
>>> disp = segments.Seg14x4(i2c)
>>> disp.fill(0)
>>> disp._push('.')
>>> disp.show()
>>> disp._get_buffer(7) & 0b01000000
64
>>> 

[makermelissa]

Ok cool, I just wanted to make sure it was a bug before I worked on it.

[makermelissa]

Yeah, you were correct. Thanks for pointing me in the right direction. The reason it wasn't is 2-fold. First buffer position 7 isn't used for this display. It's 8 for the 4th digit (see self._POSITIONS). Secondly the dot is lit with the highest bit (128). After that, a little experimentation and I got the fix working.

[caternuson]

Done with #34
thanks!