Framing experiments

1 files changed, 51 insertions, 0 deletions

diff --git a/fw/test.py b/fw/test.py
new file mode 100755
index 0000000..2f0da3f
--- /dev/null
+++ b/fw/test.py
@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+import serial
+
+def chunked(data, chunk_size):
+    for i in range(0, len(data), chunk_size):
+        yield data[i:i+chunk_size]
+
+def frame_packet(data, chunk_size=32, frame_char=b'\x42'):
+    return frame_char + frame_char.join(chunked(data, chunk_size))
+
+def sync_frame(sync_char=b'\x23', chunk_size=32):
+    return sync_char*(chunk_size+1)
+
+def format_packet(data):
+    out = b''
+    for a, b, c, d in chunked(data, 4):
+        ah, bh, ch, dh = a>>8,   b>>8,   c>>8,   d>>8
+        al, bl, cl, dl = a&0xff, b&0xff, c&0xff, d&0xff
+        # FIXME check order of high bits
+        out += bytes([al, bl, cl, dl, (ah<<6 | bh<<4 | ch<<2 | dh<<0)&0xff])
+    return out
+
+if __name__ == '__main__':
+    import argparse
+    import time
+    
+    parser = argparse.ArgumentParser()
+    parser.add_argument('serial')
+    args = parser.parse_args()
+
+    ser = serial.Serial(args.serial, 2000000)
+
+    frame_len = 4*8*8
+    black, red = [0]*frame_len, [255]*frame_len
+    frames = \
+            [black]*10 +\
+            [red]*10 +\
+            [[i]*frame_len for i in range(0, 256, 4)] +\
+            [[(i + (d//8)*8) % 256*8 for d in range(frame_len)] for i in range(0, 256, 16)]
+
+    frames = [red, black]*5
+    while True:
+        print('Sending sync structure')
+        ser.write(sync_frame())
+        for i, frame in enumerate(frames):
+            formatted = format_packet(frame)
+            #formatted = format_packet(list(range(256)))
+            framed = frame_packet(formatted)
+            print('sending', i, len(frame), len(formatted), len(framed))
+            ser.write(framed)
+            time.sleep(0.1)