Initial commit

pico.py

@@ -0,0 +1,52 @@
+import machine
+import sdcard
+import uos
+import array, time
+from machine import Pin
+import rp2
+from ws2812b import WS2812B
+
+NUM_LEDS = 256
+
+ws = WS2812B(256, 28, 0.1)
+
+# Assign chip select (CS) pin (and start it high)
+cs = machine.Pin(13, machine.Pin.OUT)
+
+# Intialize SPI peripheral (start with 1 MHz)
+spi = machine.SPI(1,
+                  baudrate=1000000,
+                  polarity=0,
+                  phase=0,
+                  bits=8,
+                  firstbit=machine.SPI.MSB,
+                  sck=machine.Pin(10),
+                  mosi=machine.Pin(11),
+                  miso=machine.Pin(12))
+
+# Initialize SD card
+sd = sdcard.SDCard(spi, cs)
+
+# Mount filesystem
+vfs = uos.VfsFat(sd)
+uos.mount(vfs, "/sd")
+print(uos.listdir("/sd"))
+
+
+with open("/sd/art.grb", 'rb') as f:
+    while True:
+        frame = f.read(256*3)
+        if not frame:
+            print("End of frames")
+            break
+        
+        for i in range(256):
+            offset = i * 3
+            green, red, blue = frame[offset:offset + 3]
+            print(red, green, blue)
+            ws.pixels_set(i, (red, green, blue))
+        ws.pixels_show()
+
+
+
+