Added 7-Segment FeatherWing

[makermelissa]

Now the that last pull request has been moved along, here's the next one. This adds the 7-segment featherwing and gives it similar functionality to the alphanumeric one.

[jerryneedell]

hmmm -- just a heads up -- I tried thsi on a Particle Argon and it causes the board to reset ??
checking to see if I have something configured wrong

[makermelissa]

Uh oh. I don't have any particle boards to test this out on. :-\

[makermelissa]

Could you also check the AlphaNumeric FeatherWing if you have it Jerry? The code bases are pretty much the same.

[jerryneedell]

no idea why it should matter -- do you have any nrf52840 boards?

[makermelissa]

Nope.

[jerryneedell]

works fine on a feather_m4_express.. I'll try a different nrf52840

[jerryneedell]

fails the same way on a feather_nrf52840_express -- very strange

[jerryneedell]

I'll try the 14 segment

[jerryneedell]

same result with alphanum

[makermelissa]

Yeah, I developed it against a Feather M4 Express and I think I tried it out on the Feather M0 as well.

[jerryneedell]

let me try previous release of alphanum

[makermelissa]

Could you see if you could narrow it down to where it's failing?

[jerryneedell]

same with previous release -- I'll dig into it -- to board goes to safe mode! I'll also ping Danh

[makermelissa]

I'm wondering if the issue is in this library or the ht16k33 library.

[jerryneedell]

the ht16k33 works for the 14segment on the feather_nrf52840

[jerryneedell]

opened issue in CP adafruit/circuitpython#1545
it crashes on the featherwing library import if it is in a script ???

[jerryneedell]

as noted in the CP issue -- I can use this library on the feather_nrf52840 if I copy the contents of sevensegment_featherwing.py directly into the main file. here is my test

"""This example changes the fill, brightness, blink rates,
shows number and text printing, displays a counter
and then shows off the new marquee features."""

from time import sleep
import adafruit_ht16k33.segments as segments
from adafruit_featherwing import shared
from adafruit_featherwing.led_segments import Segments

class SevenSegmentFeatherWing(Segments):
    """Class representing an `Adafruit 7-Segment LED HT16K33 FeatherWing
       <https://www.adafruit.com/product/3140>`_.

       Automatically uses the feather's I2C bus."""
    def __init__(self, address=0x70):
        super().__init__()
        self._segments = segments.Seg7x4(shared.I2C_BUS, address)
        self._segments.auto_write = False

display = SevenSegmentFeatherWing()

#Fill and empty all segments
for count in range(0, 3):
    display.fill(True)
    sleep(0.5)
    display.fill(False)
    sleep(0.5)

#Display a number and text
display.print(1234)
sleep(1)
display.print('FEED')

#Change brightness
for brightness in range(0, 16):
    display.brightness = brightness
    sleep(0.1)

#Change blink rate
for blink_rate in range(3, 0, -1):
    display.blink_rate = blink_rate
    sleep(4)
display.blink_rate = 0

#Show a counter using decimals
count = 975.0
while count < 1025:
    count += 1
    display.print(count)
    sleep(0.1)

#Display a Time
hour = 12
for minute in range(15, 26):
    display.print("{}:{}".format(hour, minute))
    sleep(1)

#Show the Marquee
display.marquee('Deadbeef 192.168.100.102... ', 0.2)

this executes on the feather_nrf52840 just fine -- I also ran the alphanum test the same way.

[jerryneedell]

based on the above, I have no concerns with this PR -- it remains to be resolved if the nrf52840 issue is with this library -- already existing or with CP.
Given that, I will approve the PR since it is not relevant to the problem.

[jerryneedell]

I found an issue with thsi library overall when used on an nrf52840 but with the workaround described in the comments, I can get everything to wok. It worked fine on the feather_m4_express. I will approve the PR since I don't think it is part of the larger issue.