framebuffer: fix pixel split

diff --git a/milkymist/framebuffer/__init__.py b/milkymist/framebuffer/__init__.py
index 65a2bbced8392ec086ddc2a5d472ff039a326992..5800a64f767dfede30886c1bfa5df82e6c699b18 100644 (file)
--- a/milkymist/framebuffer/__init__.py
+++ b/milkymist/framebuffer/__init__.py
@@ -110,12 +110,13 @@ class VTG(Actor):
                hcounter = Signal(BV(_hbits))
                vcounter = Signal(BV(_vbits))
                
+               skip = _bpc - _bpc_dac
                comb = [
                        active.eq(hactive & vactive),
                        If(active,
-                               self.token("dac").r.eq(self.token("pixels").r[:_bpc_dac]),
-                               self.token("dac").g.eq(self.token("pixels").g[:_bpc_dac]),
-                               self.token("dac").b.eq(self.token("pixels").b[:_bpc_dac])
+                               self.token("dac").r.eq(self.token("pixels").r[skip:]),
+                               self.token("dac").g.eq(self.token("pixels").g[skip:]),
+                               self.token("dac").b.eq(self.token("pixels").b[skip:])
                        ),
                        
                        generate_en.eq(self.endpoints["timing"].stb & self.endpoints["dac"].ack \