sw: Implement SPI transmissions

software/webradio.py

@@ -3,6 +3,7 @@
 from PIL import Image, ImageDraw, ImageFont
 import asyncio
 from mpd import MPDClient
+import spidev
 
 IO_DELAY = (1.0 / 20.0)
 MPD_DELAY = 0.5
@@ -17,7 +18,6 @@ class display(object):
 		self.img = Image.new('1', (self.width, self.height), color = not self.fg)
 		self.d = ImageDraw.Draw(self.img)
 		self.bar_redraw = True
-		self.dbg = 0
 
 	def render(self):
 		print("render NYI")
@@ -26,9 +26,8 @@ class display(object):
 		print("animate NYI")
 
 	def get_image(self):
-		self.img.save("/tmp/wr/frame%d.png" % self.dbg)
-		self.dbg += 1
-		return self.img.tobytes()
+		temp = self.img
+		return temp.rotate(-90,expand=True).tobytes()
 
 class display_playback(display):
 	def __init__(self):
@@ -133,8 +132,8 @@ class radioserv:
 		while True:
 			self.disp_mgr.animate(1)
 			self.disp_mgr.render()
-			self.disp_mgr.get_image()
-			print("x")
+			data = list(self.disp_mgr.get_image())
+			self.spi.xfer(data)
 			await self.io_event.wait()
 			self.io_event.clear()
 
@@ -193,6 +192,12 @@ class radioserv:
 			await asyncio.sleep(MPD_DELAY)
 
 	async def main(self):
+		# Connect to SPI
+		self.spi = spidev.SpiDev()
+		self.spi.open(0, 0)
+		self.spi.max_speed_hz = 500000
+		self.spi.mode = 0b00
+
 		# Connect to MPD
 		self.mpd = MPDClient()
 		self.mpd.connect("yuki", 6600)
@@ -212,7 +217,7 @@ class radioserv:
 		mpd_task = asyncio.create_task(self.mpd_main())
 
 		# TODO: Wait for exit condition (shutdown command)
-		await asyncio.sleep(10)
+		await asyncio.sleep(60)
 
 		io_timer_task.cancel()
 		io_task.cancel()