drtio: better LED demo

artiq/examples/drtio/device_db.pyon

@@ -32,7 +32,42 @@
         "module": "artiq.coredevice.ttl",
         "class": "TTLOut",
         "arguments": {"channel": 1},
-        "comment": "Hello World"
+    },
+    "rled2": {
+        "type": "local",
+        "module": "artiq.coredevice.ttl",
+        "class": "TTLOut",
+        "arguments": {"channel": 2},
+    },
+    "rled3": {
+        "type": "local",
+        "module": "artiq.coredevice.ttl",
+        "class": "TTLOut",
+        "arguments": {"channel": 3},
+    },
+    "rled4": {
+        "type": "local",
+        "module": "artiq.coredevice.ttl",
+        "class": "TTLOut",
+        "arguments": {"channel": 4},
+    },
+    "rled5": {
+        "type": "local",
+        "module": "artiq.coredevice.ttl",
+        "class": "TTLOut",
+        "arguments": {"channel": 5},
+    },
+    "rled6": {
+        "type": "local",
+        "module": "artiq.coredevice.ttl",
+        "class": "TTLOut",
+        "arguments": {"channel": 6},
+    },
+    "rled7": {
+        "type": "local",
+        "module": "artiq.coredevice.ttl",
+        "class": "TTLOut",
+        "arguments": {"channel": 7},
     },
 
     "rsmap": {

artiq/examples/drtio/repository/blink_forever.py

@@ -4,11 +4,18 @@ from artiq.experiment import *
 class BlinkForever(EnvExperiment):
     def build(self):
         self.setattr_device("core")
-        self.setattr_device("rled0")
+        self.leds = [self.get_device("rled" + str(i)) for i in range(8)]
 
     @kernel
     def run(self):
-        self.core.reset()
+        #self.core.reset()
+        self.core.break_realtime()
+
         while True:
-            self.rled0.pulse(100*ms)
+            for led in self.leds:
-            delay(100*ms)
+                led.pulse(250*ms)
+            t = now_mu()
+            for led in self.leds:
+                at_mu(t)
+                led.pulse(500*ms)
+            delay(250*ms)