Add flake8 CI checks

Signed-off-by: Matthias Blankertz <matthias@blankertz.org>

.gitea/workflows/check-format.yaml

@@ -12,3 +12,18 @@ jobs:
         run: |
           cmake software -B build
           cmake --build build -- check-format
+  Check-Python-Flake8:
+    runs-on: ubuntu-22.04-full
+    steps:
+      - name: Get Flake8
+        run: |
+          python -m venv flake-venv
+          flake-venv/bin/pip install flake8==7.0
+      - name: Check out repository code
+        uses: actions/checkout@v4
+        with:
+          path: git
+      - name: Check python
+        run: |
+          cd git/software/src &&
+          find . -iname '*.py' -exec ../../../flake-venv/bin/flake8 {} +

software/src/rp2_neopixel.py

@@ -14,17 +14,18 @@ T1 = 2
 T2 = 5
 T3 = 3
 
+
 @asm_pio(sideset_init=(PIO.OUT_LOW), fifo_join=PIO.JOIN_TX, autopull=True,
          out_shiftdir=PIO.SHIFT_LEFT)
 def _ws2812_pio(T1=T1, T2=T2, T3=T3):
-    label("bitloop")
-    out(x, 1).side(0).delay(T3-1)
-    jmp(not_x, "do_zero").side(1) [T1-1]
-    label("do_one")
-    jmp("bitloop").side(1) [T2-1]
-    label("do_zero")
-    nop().side(0) [T2-1]
-    wrap()
+    label("bitloop")  # noqa:F821
+    out(x, 1).side(0).delay(T3-1)  # noqa:F821
+    jmp(not_x, "do_zero").side(1).delay(T1-1)  # noqa:F821
+    label("do_one")  # noqa:F821
+    jmp("bitloop").side(1).delay(T2-1)  # noqa:F821
+    label("do_zero")  # noqa:F821
+    nop().side(0).delay(T2-1)  # noqa:F821
+    wrap()  # noqa:F821
 
 
 class NeoPixel:

software/src/test.py

@@ -44,14 +44,13 @@ async def rainbow(np, period=10):
 
 
 samplerate = 44100
-hz = 441 # 344.53125
-count = 100 # 128
+hz = 441
+count = 100
 amplitude = 0x1fff
 buf = array('I', range(count))
 for i in range(len(buf)):
-     val = int(sin(i * hz / samplerate * 2 * pi)*amplitude) & 0xffff
-     buf[i] = (val << 16) | val
-     # print(hex(buf[i]))
+    val = int(sin(i * hz / samplerate * 2 * pi)*amplitude) & 0xffff
+    buf[i] = (val << 16) | val
 
 
 async def output_sound(audioctx):
@@ -60,9 +59,7 @@ async def output_sound(audioctx):
     while True:
         pushed, avail, underruns = audioctx.put(buf[pos:])
         pos = (pos + pushed) % len(buf)
-        # pushed, avail = audioctx.put(array('I', range(pos, pos+100)))
-        # pos += pushed
-        #print(f"pushed {pushed}, pos {pos}, avail {avail}")
+        # print(f"pushed {pushed}, pos {pos}, avail {avail}")
         if underruns > known_underruns:
             print(f"{underruns:x}")
             known_underruns = underruns
@@ -94,7 +91,8 @@ def list_sd():
 delay_sum = 0
 delay_count = 0
 max_delay = 0
-    
+
+
 async def latency_test():
     global delay_sum
     global delay_count