Merge pull request #12 from adafruit/jepler-examples-improvements

Fix the neopixel example

Author: kattni

.github/workflows/build.yml

@@ -50,10 +50,6 @@ jobs:
     - name: Pre-commit hooks
       run: |
         pre-commit run --all-files
-    - name: PyLint
-      run: |
-        pylint $( find . -path './adafruit*.py' )
-        ([[ ! -d "examples" ]] || pylint --disable=missing-docstring,invalid-name,bad-whitespace $( find . -path "./examples/*.py" ))
     - name: Build assets
       run: circuitpython-build-bundles --filename_prefix ${{ steps.repo-name.outputs.repo-name }} --library_location .
     - name: Archive bundles

.pre-commit-config.yaml

@@ -17,3 +17,18 @@ repos:
     -   id: check-yaml
     -   id: end-of-file-fixer
     -   id: trailing-whitespace
+-   repo: https://github.com/pycqa/pylint
+    rev: pylint-2.7.1
+    hooks:
+    -   id: pylint
+        name: pylint (library code)
+        types: [python]
+        exclude: "^(docs/|examples/|setup.py$)"
+-   repo: local
+    hooks:
+    -   id: pylint_examples
+        name: pylint (examples code)
+        description: Run pylint rules on "examples/*.py" files
+        entry: /usr/bin/env bash -c
+        args: ['([[ ! -d "examples" ]] || for example in $(find . -path "./examples/*.py"); do pylint --disable=missing-docstring,invalid-name $example; done)']
+        language: system

examples/pioasm_neopixel.py

@@ -5,6 +5,7 @@
 import time
 import rp2pio
 import board
+import microcontroller
 import adafruit_pioasm
 
 # NeoPixels are 800khz bit streams. Zeroes are 1/3 duty cycle (~416ns) and ones
@@ -25,21 +26,31 @@
 
 assembled = adafruit_pioasm.assemble(program)
 
+# If the board has a designated neopixel, then use it. Otherwise use
+# GPIO16 as an arbitrary choice.
+if hasattr(board, "NEOPIXEL"):
+    NEOPIXEL = board.NEOPIXEL
+else:
+    NEOPIXEL = microcontroller.pin.GPIO16
+
 sm = rp2pio.StateMachine(
     assembled,
     frequency=800000 * 6,  # 800khz * 6 clocks per bit
-    init=adafruit_pioasm.assemble("set pindirs 1"),
-    first_set_pin=board.D12,
-    first_sideset_pin=board.D12,
+    first_set_pin=NEOPIXEL,
+    first_sideset_pin=NEOPIXEL,
     auto_pull=True,
     out_shift_right=False,
     pull_threshold=8,
 )
 print("real frequency", sm.frequency)
 
-for i in range(100):
+for i in range(30):
     sm.write(b"\x0a\x00\x00")
     time.sleep(0.1)
+    sm.write(b"\x00\x0a\x00")
+    time.sleep(0.1)
+    sm.write(b"\x00\x00\x0a")
+    time.sleep(0.1)
 print("writes done")
 
 time.sleep(2)