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changeset 364:9a03605121b7

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fix usb dmx levels off by one
author Drew Perttula <drewp@bigasterisk.com>
date Fri, 15 Jun 2007 16:51:14 +0000
parents 87b14afaa00e
children d6a729e3c31d
files light9/io/__init__.py
diffstat 1 files changed, 4 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/light9/io/__init__.py	Sat Jun 16 16:02:11 2007 +0000
+++ b/light9/io/__init__.py	Fri Jun 15 16:51:14 2007 +0000
@@ -72,7 +72,10 @@
     def sendlevels(self, levels):
         if self.dummy:
             return
-        packet = ''.join([chr(int(lev * 255 / 100)) for lev in levels]) + "\x55"
+        # I was outputting on 76 and it was turning on the light at
+        # dmx75. So I added the 0 byte.
+        packet = '\x00' + ''.join([chr(int(lev * 255 / 100)) 
+                                  for lev in levels]) + "\x55"
         self._dmx().write(packet)
 
 class SerialPots(BaseIO):